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2022-10-16Merge tag 'random-6.1-rc1-for-linus' of ↵Linus Torvalds23-48/+45
git://git.kernel.org/pub/scm/linux/kernel/git/crng/random Pull more random number generator updates from Jason Donenfeld: "This time with some large scale treewide cleanups. The intent of this pull is to clean up the way callers fetch random integers. The current rules for doing this right are: - If you want a secure or an insecure random u64, use get_random_u64() - If you want a secure or an insecure random u32, use get_random_u32() The old function prandom_u32() has been deprecated for a while now and is just a wrapper around get_random_u32(). Same for get_random_int(). - If you want a secure or an insecure random u16, use get_random_u16() - If you want a secure or an insecure random u8, use get_random_u8() - If you want secure or insecure random bytes, use get_random_bytes(). The old function prandom_bytes() has been deprecated for a while now and has long been a wrapper around get_random_bytes() - If you want a non-uniform random u32, u16, or u8 bounded by a certain open interval maximum, use prandom_u32_max() I say "non-uniform", because it doesn't do any rejection sampling or divisions. Hence, it stays within the prandom_*() namespace, not the get_random_*() namespace. I'm currently investigating a "uniform" function for 6.2. We'll see what comes of that. By applying these rules uniformly, we get several benefits: - By using prandom_u32_max() with an upper-bound that the compiler can prove at compile-time is ≤65536 or ≤256, internally get_random_u16() or get_random_u8() is used, which wastes fewer batched random bytes, and hence has higher throughput. - By using prandom_u32_max() instead of %, when the upper-bound is not a constant, division is still avoided, because prandom_u32_max() uses a faster multiplication-based trick instead. - By using get_random_u16() or get_random_u8() in cases where the return value is intended to indeed be a u16 or a u8, we waste fewer batched random bytes, and hence have higher throughput. This series was originally done by hand while I was on an airplane without Internet. Later, Kees and I worked on retroactively figuring out what could be done with Coccinelle and what had to be done manually, and then we split things up based on that. So while this touches a lot of files, the actual amount of code that's hand fiddled is comfortably small" * tag 'random-6.1-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random: prandom: remove unused functions treewide: use get_random_bytes() when possible treewide: use get_random_u32() when possible treewide: use get_random_{u8,u16}() when possible, part 2 treewide: use get_random_{u8,u16}() when possible, part 1 treewide: use prandom_u32_max() when possible, part 2 treewide: use prandom_u32_max() when possible, part 1
2022-10-16Merge tag '6.1-rc-smb3-client-fixes-part2' of ↵Linus Torvalds23-726/+922
git://git.samba.org/sfrench/cifs-2.6 Pull more cifs updates from Steve French: - fix a regression in guest mounts to old servers - improvements to directory leasing (caching directory entries safely beyond the root directory) - symlink improvement (reducing roundtrips needed to process symlinks) - an lseek fix (to problem where some dir entries could be skipped) - improved ioctl for returning more detailed information on directory change notifications - clarify multichannel interface query warning - cleanup fix (for better aligning buffers using ALIGN and round_up) - a compounding fix - fix some uninitialized variable bugs found by Coverity and the kernel test robot * tag '6.1-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6: smb3: improve SMB3 change notification support cifs: lease key is uninitialized in two additional functions when smb1 cifs: lease key is uninitialized in smb1 paths smb3: must initialize two ACL struct fields to zero cifs: fix double-fault crash during ntlmssp cifs: fix static checker warning cifs: use ALIGN() and round_up() macros cifs: find and use the dentry for cached non-root directories also cifs: enable caching of directories for which a lease is held cifs: prevent copying past input buffer boundaries cifs: fix uninitialised var in smb2_compound_op() cifs: improve symlink handling for smb2+ smb3: clarify multichannel warning cifs: fix regression in very old smb1 mounts cifs: fix skipping to incorrect offset in emit_cached_dirents
2022-10-15smb3: improve SMB3 change notification supportSteve French6-13/+90
Change notification is a commonly supported feature by most servers, but the current ioctl to request notification when a directory is changed does not return the information about what changed (even though it is returned by the server in the SMB3 change notify response), it simply returns when there is a change. This ioctl improves upon CIFS_IOC_NOTIFY by returning the notify information structure which includes the name of the file(s) that changed and why. See MS-SMB2 2.2.35 for details on the individual filter flags and the file_notify_information structure returned. To use this simply pass in the following (with enough space to fit at least one file_notify_information structure) struct __attribute__((__packed__)) smb3_notify { uint32_t completion_filter; bool watch_tree; uint32_t data_len; uint8_t data[]; } __packed; using CIFS_IOC_NOTIFY_INFO 0xc009cf0b or equivalently _IOWR(CIFS_IOCTL_MAGIC, 11, struct smb3_notify_info) The ioctl will block until the server detects a change to that directory or its subdirectories (if watch_tree is set). Acked-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Acked-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-15cifs: lease key is uninitialized in two additional functions when smb1Steve French1-2/+2
cifs_open and _cifsFileInfo_put also end up with lease_key uninitialized in smb1 mounts. It is cleaner to set lease key to zero in these places where leases are not supported (smb1 can not return lease keys so the field was uninitialized). Addresses-Coverity: 1514207 ("Uninitialized scalar variable") Addresses-Coverity: 1514331 ("Uninitialized scalar variable") Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-15cifs: lease key is uninitialized in smb1 pathsSteve French1-1/+1
It is cleaner to set lease key to zero in the places where leases are not supported (smb1 can not return lease keys so the field was uninitialized). Addresses-Coverity: 1513994 ("Uninitialized scalar variable") Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-15smb3: must initialize two ACL struct fields to zeroSteve French1-1/+2
Coverity spotted that we were not initalizing Stbz1 and Stbz2 to zero in create_sd_buf. Addresses-Coverity: 1513848 ("Uninitialized scalar variable") Cc: <stable@vger.kernel.org> Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-15cifs: fix double-fault crash during ntlmsspPaulo Alcantara1-7/+9
The crash occurred because we were calling memzero_explicit() on an already freed sess_data::iov[1] (ntlmsspblob) in sess_free_buffer(). Fix this by not calling memzero_explicit() on sess_data::iov[1] as it's already by handled by callers. Fixes: a4e430c8c8ba ("cifs: replace kfree() with kfree_sensitive() for sensitive data") Reviewed-by: Enzo Matsumiya <ematsumiya@suse.de> Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-14Merge tag 'for-linus-6.1-rc1' of ↵Linus Torvalds5-25/+45
git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs Pull UBI and UBIFS updates from Richard Weinberger: "UBI: - Use bitmap API to allocate bitmaps - New attach mode, disable_fm, to attach without fastmap - Fixes for various typos in comments UBIFS: - Fix for a deadlock when setting xattrs for encrypted file - Fix for an assertion failures when truncating encrypted files - Fixes for various typos in comments" * tag 'for-linus-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs: ubi: fastmap: Add fastmap control support for 'UBI_IOCATT' ioctl ubi: fastmap: Use the bitmap API to allocate bitmaps ubifs: Fix AA deadlock when setting xattr for encrypted file ubifs: Fix UBIFS ro fail due to truncate in the encrypted directory mtd: ubi: drop unexpected word 'a' in comments ubi: block: Fix typos in comments ubi: fastmap: Fix typo in comments ubi: Fix repeated words in comments ubi: ubi-media.h: Fix comment typo ubi: block: Remove in vain semicolon ubifs: Fix ubifs_check_dir_empty() kernel-doc comment
2022-10-14Merge tag 'for-linus-6.1-rc1' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux Pull UML updates from Richard Weinberger: - Move to strscpy() - Improve panic notifiers - Fix NR_CPUS usage - Fixes for various comments - Fixes for virtio driver * tag 'for-linus-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux: uml: Remove the initialization of statics to 0 um: Do not initialise statics to 0. um: Fix comment typo um: Improve panic notifiers consistency and ordering um: remove unused reactivate_chan() declaration um: mmaper: add __exit annotations to module exit funcs um: virt-pci: add __init/__exit annotations to module init/exit funcs hostfs: move from strlcpy with unused retval to strscpy um: move from strlcpy with unused retval to strscpy um: increase default virtual physical memory to 64 MiB UM: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK um: read multiple msg from virtio slave request fd
2022-10-14Merge tag 'mm-stable-2022-10-13' of ↵Linus Torvalds2-2/+4
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull more MM updates from Andrew Morton: - fix a race which causes page refcounting errors in ZONE_DEVICE pages (Alistair Popple) - fix userfaultfd test harness instability (Peter Xu) - various other patches in MM, mainly fixes * tag 'mm-stable-2022-10-13' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (29 commits) highmem: fix kmap_to_page() for kmap_local_page() addresses mm/page_alloc: fix incorrect PGFREE and PGALLOC for high-order page mm/selftest: uffd: explain the write missing fault check mm/hugetlb: use hugetlb_pte_stable in migration race check mm/hugetlb: fix race condition of uffd missing/minor handling zram: always expose rw_page LoongArch: update local TLB if PTE entry exists mm: use update_mmu_tlb() on the second thread kasan: fix array-bounds warnings in tests hmm-tests: add test for migrate_device_range() nouveau/dmem: evict device private memory during release nouveau/dmem: refactor nouveau_dmem_fault_copy_one() mm/migrate_device.c: add migrate_device_range() mm/migrate_device.c: refactor migrate_vma and migrate_deivce_coherent_page() mm/memremap.c: take a pgmap reference on page allocation mm: free device private pages have zero refcount mm/memory.c: fix race when faulting a device private page mm/damon: use damon_sz_region() in appropriate place mm/damon: move sz_damon_region to damon_sz_region lib/test_meminit: add checks for the allocation functions ...
2022-10-14cifs: fix static checker warningPaulo Alcantara1-1/+1
Remove unnecessary NULL check of oparam->cifs_sb when parsing symlink error response as it's already set by all smb2_open_file() callers and deferenced earlier. This fixes below report: fs/cifs/smb2file.c:126 smb2_open_file() warn: variable dereferenced before check 'oparms->cifs_sb' (see line 112) Link: https://lore.kernel.org/r/Y0kt42j2tdpYakRu@kili Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-13Merge tag 'ceph-for-6.1-rc1' of https://github.com/ceph/ceph-clientLinus Torvalds5-9/+54
Pull ceph updates from Ilya Dryomov: "A quiet round this time: several assorted filesystem fixes, the most noteworthy one being some additional wakeups in cap handling code, and a messenger cleanup" * tag 'ceph-for-6.1-rc1' of https://github.com/ceph/ceph-client: ceph: remove Sage's git tree from documentation ceph: fix incorrectly showing the .snap size for stat ceph: fail the open_by_handle_at() if the dentry is being unlinked ceph: increment i_version when doing a setattr with caps ceph: Use kcalloc for allocating multiple elements ceph: no need to wait for transition RDCACHE|RD -> RD ceph: fail the request if the peer MDS doesn't support getvxattr op ceph: wake up the waiters if any new caps comes libceph: drop last_piece flag from ceph_msg_data_cursor
2022-10-13Merge tag 'nfs-for-6.1-1' of git://git.linux-nfs.org/projects/anna/linux-nfsLinus Torvalds17-36/+194
Pull NFS client updates from Anna Schumaker: "New Features: - Add NFSv4.2 xattr tracepoints - Replace xprtiod WQ in rpcrdma - Flexfiles cancels I/O on layout recall or revoke Bugfixes and Cleanups: - Directly use ida_alloc() / ida_free() - Don't open-code max_t() - Prefer using strscpy over strlcpy - Remove unused forward declarations - Always return layout states on flexfiles layout return - Have LISTXATTR treat NFS4ERR_NOXATTR as an empty reply instead of error - Allow more xprtrdma memory allocations to fail without triggering a reclaim - Various other xprtrdma clean ups - Fix rpc_killall_tasks() races" * tag 'nfs-for-6.1-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (27 commits) NFSv4/flexfiles: Cancel I/O if the layout is recalled or revoked SUNRPC: Add API to force the client to disconnect SUNRPC: Add a helper to allow pNFS drivers to selectively cancel RPC calls SUNRPC: Fix races with rpc_killall_tasks() xprtrdma: Fix uninitialized variable xprtrdma: Prevent memory allocations from driving a reclaim xprtrdma: Memory allocation should be allowed to fail during connect xprtrdma: MR-related memory allocation should be allowed to fail xprtrdma: Clean up synopsis of rpcrdma_regbuf_alloc() xprtrdma: Clean up synopsis of rpcrdma_req_create() svcrdma: Clean up RPCRDMA_DEF_GFP SUNRPC: Replace the use of the xprtiod WQ in rpcrdma NFSv4.2: Add a tracepoint for listxattr NFSv4.2: Add tracepoints for getxattr, setxattr, and removexattr NFSv4.2: Move TRACE_DEFINE_ENUM(NFS4_CONTENT_*) under CONFIG_NFS_V4_2 NFSv4.2: Add special handling for LISTXATTR receiving NFS4ERR_NOXATTR nfs: remove nfs_wait_atomic_killable() and nfs_write_prepare() declaration NFSv4: remove nfs4_renewd_prepare_shutdown() declaration fs/nfs/pnfs_nfs.c: fix spelling typo and syntax error in comment NFSv4/pNFS: Always return layout stats on layout return for flexfiles ...
2022-10-13Merge tag 'for-linus-6.1-ofs1' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux Pull orangefs update from Mike Marshall: "Change iterate to iterate_shared" * tag 'for-linus-6.1-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux: Orangefs: change iterate to iterate_shared
2022-10-13cifs: use ALIGN() and round_up() macrosEnzo Matsumiya5-38/+33
Improve code readability by using existing macros: Replace hardcoded alignment computations (e.g. (len + 7) & ~0x7) by ALIGN()/IS_ALIGNED() macros. Also replace (DIV_ROUND_UP(len, 8) * 8) with ALIGN(len, 8), which, if not optimized by the compiler, has the overhead of a multiplication and a division. Do the same for roundup() by replacing it by round_up() (division-less version, but requires the multiple to be a power of 2, which is always the case for us). And remove some unnecessary checks where !IS_ALIGNED() would fit, but calling round_up() directly is fine as it's a no-op if the value is already aligned. Signed-off-by: Enzo Matsumiya <ematsumiya@suse.de> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-13cifs: find and use the dentry for cached non-root directories alsoRonnie Sahlberg1-14/+49
This allows us to use cached attributes for the entries in a cached directory for as long as a lease is held on the directory itself. Previously we have always allowed "used cached attributes for 1 second" but this extends this to the lifetime of the lease as well as making the caching safer. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-13cifs: enable caching of directories for which a lease is heldRonnie Sahlberg4-193/+263
This expands the directory caching to now cache an open handle for all directories (up to a maximum) and not just the root directory. In this patch, locking and refcounting is intended to work as so: The main function to get a reference to a cached handle is find_or_create_cached_dir() called from open_cached_dir() These functions are protected under the cfid_list_lock spin-lock to make sure we do not race creating new references for cached dirs with deletion of expired ones. An successful open_cached_dir() will take out 2 references to the cfid if this was the very first and successful call to open the directory and it acquired a lease from the server. One reference is for the lease and the other is for the cfid that we return. The is lease reference is tracked by cfid->has_lease. If the directory already has a handle with an active lease, then we just take out one new reference for the cfid and return it. It can happen that we have a thread that tries to open a cached directory where we have a cfid already but we do not, yet, have a working lease. In this case we will just return NULL, and this the caller will fall back to the case when no handle was available. In this model the total number of references we have on a cfid is 1 for while the handle is open and we have a lease, and one additional reference for each open instance of a cfid. Once we get a lease break (cached_dir_lease_break()) we remove the cfid from the list under the spinlock. This prevents any new threads to use it, and we also call smb2_cached_lease_break() via the work_queue in order to drop the reference we got for the lease (we drop it outside of the spin-lock.) Anytime a thread calls close_cached_dir() we also drop a reference to the cfid. When the last reference to the cfid is released smb2_close_cached_fid() will be invoked which will drop the reference ot the dentry we held for this cfid and it will also, if we the handle is open/has a lease also call SMB2_close() to close the handle on the server. Two events require special handling: invalidate_all_cached_dirs() this function is called from SMB2_tdis() and cifs_mark_open_files_invalid(). In both cases the tcon is either gone already or will be shortly so we do not need to actually close the handles. They will be dropped server side as part of the tcon dropping. But we have to be careful about a potential race with a concurrent lease break so we need to take out additional refences to avoid the cfid from being freed while we are still referencing it. free_cached_dirs() which is called from tconInfoFree(). This is called quite late in the umount process so there should no longer be any open handles or files and we can just free all the remaining data. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-13cifs: prevent copying past input buffer boundariesPaulo Alcantara1-2/+2
Prevent copying past @data buffer in smb2_validate_and_copy_iov() as the output buffer in @iov might be potentially bigger and thus copying more bytes than requested in @minbufsize. Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-13cifs: fix uninitialised var in smb2_compound_op()Paulo Alcantara1-0/+1
Fix uninitialised variable @idata when calling smb2_compound_op() with SMB2_OP_POSIX_QUERY_INFO. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-13cifs: improve symlink handling for smb2+Paulo Alcantara14-453/+451
When creating inode for symlink, the client used to send below requests to fill it in: * create+query_info+close (STATUS_STOPPED_ON_SYMLINK) * create(+reparse_flag)+query_info+close (set file attrs) * create+ioctl(get_reparse)+close (query reparse tag) and then for every access to the symlink dentry, the ->link() method would send another: * create+ioctl(get_reparse)+close (parse symlink) So, in order to improve: (i) Get rid of unnecessary roundtrips and then resolve symlinks as follows: * create+query_info+close (STATUS_STOPPED_ON_SYMLINK + parse symlink + get reparse tag) * create(+reparse_flag)+query_info+close (set file attrs) (ii) Set the resolved symlink target directly in inode->i_link and use simple_get_link() for ->link() to simply return it. Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-13smb3: clarify multichannel warningSteve French1-1/+2
When server does not return network interfaces, clarify the message to indicate that "multichannel not available" not just that "empty network interface returned by server ..." Suggested-by: Tom Talpey <tom@talpey.com> Reviewed-by: Bharath SM <bharathsm@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-13cifs: fix regression in very old smb1 mountsRonnie Sahlberg1-6/+5
BZ: 215375 Fixes: 76a3c92ec9e0 ("cifs: remove support for NTLM and weaker authentication algorithms") Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-12ext4,f2fs: fix readahead of verity dataMatthew Wilcox (Oracle)2-2/+4
The recent change of page_cache_ra_unbounded() arguments was buggy in the two callers, causing us to readahead the wrong pages. Move the definition of ractl down to after the index is set correctly. This affected performance on configurations that use fs-verity. Link: https://lkml.kernel.org/r/20221012193419.1453558-1-willy@infradead.org Fixes: 73bb49da50cd ("mm/readahead: make page_cache_ra_unbounded take a readahead_control") Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reported-by: Jintao Yin <nicememory@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-10-12Merge tag 'mm-hotfixes-stable-2022-10-11' of ↵Linus Torvalds2-5/+21
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc hotfixes from Andrew Morton: "Five hotfixes - three for nilfs2, two for MM. For are cc:stable, one is not" * tag 'mm-hotfixes-stable-2022-10-11' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: nilfs2: fix leak of nilfs_root in case of writer thread creation failure nilfs2: fix NULL pointer dereference at nilfs_bmap_lookup_at_level() nilfs2: fix use-after-free bug of struct nilfs_root mm/damon/core: initialize damon_target->list in damon_new_target() mm/hugetlb: fix races when looking up a CONT-PTE/PMD size hugetlb page
2022-10-12Merge tag 'mm-nonmm-stable-2022-10-11' of ↵Linus Torvalds30-175/+260
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-MM updates from Andrew Morton: - hfs and hfsplus kmap API modernization (Fabio Francesco) - make crash-kexec work properly when invoked from an NMI-time panic (Valentin Schneider) - ntfs bugfixes (Hawkins Jiawei) - improve IPC msg scalability by replacing atomic_t's with percpu counters (Jiebin Sun) - nilfs2 cleanups (Minghao Chi) - lots of other single patches all over the tree! * tag 'mm-nonmm-stable-2022-10-11' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (71 commits) include/linux/entry-common.h: remove has_signal comment of arch_do_signal_or_restart() prototype proc: test how it holds up with mapping'less process mailmap: update Frank Rowand email address ia64: mca: use strscpy() is more robust and safer init/Kconfig: fix unmet direct dependencies ia64: update config files nilfs2: replace WARN_ONs by nilfs_error for checkpoint acquisition failure fork: remove duplicate included header files init/main.c: remove unnecessary (void*) conversions proc: mark more files as permanent nilfs2: remove the unneeded result variable nilfs2: delete unnecessary checks before brelse() checkpatch: warn for non-standard fixes tag style usr/gen_init_cpio.c: remove unnecessary -1 values from int file ipc/msg: mitigate the lock contention with percpu counter percpu: add percpu_counter_add_local and percpu_counter_sub_local fs/ocfs2: fix repeated words in comments relay: use kvcalloc to alloc page array in relay_alloc_page_array proc: make config PROC_CHILDREN depend on PROC_FS fs: uninline inode_maybe_inc_iversion() ...
2022-10-11nilfs2: fix leak of nilfs_root in case of writer thread creation failureRyusuke Konishi1-4/+3
If nilfs_attach_log_writer() failed to create a log writer thread, it frees a data structure of the log writer without any cleanup. After commit e912a5b66837 ("nilfs2: use root object to get ifile"), this causes a leak of struct nilfs_root, which started to leak an ifile metadata inode and a kobject on that struct. In addition, if the kernel is booted with panic_on_warn, the above ifile metadata inode leak will cause the following panic when the nilfs2 kernel module is removed: kmem_cache_destroy nilfs2_inode_cache: Slab cache still has objects when called from nilfs_destroy_cachep+0x16/0x3a [nilfs2] WARNING: CPU: 8 PID: 1464 at mm/slab_common.c:494 kmem_cache_destroy+0x138/0x140 ... RIP: 0010:kmem_cache_destroy+0x138/0x140 Code: 00 20 00 00 e8 a9 55 d8 ff e9 76 ff ff ff 48 8b 53 60 48 c7 c6 20 70 65 86 48 c7 c7 d8 69 9c 86 48 8b 4c 24 28 e8 ef 71 c7 00 <0f> 0b e9 53 ff ff ff c3 48 81 ff ff 0f 00 00 77 03 31 c0 c3 53 48 ... Call Trace: <TASK> ? nilfs_palloc_freev.cold.24+0x58/0x58 [nilfs2] nilfs_destroy_cachep+0x16/0x3a [nilfs2] exit_nilfs_fs+0xa/0x1b [nilfs2] __x64_sys_delete_module+0x1d9/0x3a0 ? __sanitizer_cov_trace_pc+0x1a/0x50 ? syscall_trace_enter.isra.19+0x119/0x190 do_syscall_64+0x34/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd ... </TASK> Kernel panic - not syncing: panic_on_warn set ... This patch fixes these issues by calling nilfs_detach_log_writer() cleanup function if spawning the log writer thread fails. Link: https://lkml.kernel.org/r/20221007085226.57667-1-konishi.ryusuke@gmail.com Fixes: e912a5b66837 ("nilfs2: use root object to get ifile") Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Reported-by: syzbot+7381dc4ad60658ca4c05@syzkaller.appspotmail.com Tested-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-10-11nilfs2: fix NULL pointer dereference at nilfs_bmap_lookup_at_level()Ryusuke Konishi1-0/+2
If the i_mode field in inode of metadata files is corrupted on disk, it can cause the initialization of bmap structure, which should have been called from nilfs_read_inode_common(), not to be called. This causes a lockdep warning followed by a NULL pointer dereference at nilfs_bmap_lookup_at_level(). This patch fixes these issues by adding a missing sanitiy check for the i_mode field of metadata file's inode. Link: https://lkml.kernel.org/r/20221002030804.29978-1-konishi.ryusuke@gmail.com Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Reported-by: syzbot+2b32eb36c1a825b7a74c@syzkaller.appspotmail.com Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Tested-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-10-11nilfs2: fix use-after-free bug of struct nilfs_rootRyusuke Konishi1-1/+16
If the beginning of the inode bitmap area is corrupted on disk, an inode with the same inode number as the root inode can be allocated and fail soon after. In this case, the subsequent call to nilfs_clear_inode() on that bogus root inode will wrongly decrement the reference counter of struct nilfs_root, and this will erroneously free struct nilfs_root, causing kernel oopses. This fixes the problem by changing nilfs_new_inode() to skip reserved inode numbers while repairing the inode bitmap. Link: https://lkml.kernel.org/r/20221003150519.39789-1-konishi.ryusuke@gmail.com Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Reported-by: syzbot+b8c672b0e22615c80fe0@syzkaller.appspotmail.com Reported-by: Khalid Masum <khalid.masum.92@gmail.com> Tested-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-10-11nilfs2: replace WARN_ONs by nilfs_error for checkpoint acquisition failureRyusuke Konishi1-4/+10
If creation or finalization of a checkpoint fails due to anomalies in the checkpoint metadata on disk, a kernel warning is generated. This patch replaces the WARN_ONs by nilfs_error, so that a kernel, booted with panic_on_warn, does not panic. A nilfs_error is appropriate here to handle the abnormal filesystem condition. This also replaces the detected error codes with an I/O error so that neither of the internal error codes is returned to callers. Link: https://lkml.kernel.org/r/20220929123330.19658-1-konishi.ryusuke@gmail.com Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Reported-by: syzbot+fbb3e0b24e8dae5a16ee@syzkaller.appspotmail.com Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-10-11treewide: use get_random_bytes() when possibleJason A. Donenfeld1-1/+1
The prandom_bytes() function has been a deprecated inline wrapper around get_random_bytes() for several releases now, and compiles down to the exact same code. Replace the deprecated wrapper with a direct call to the real function. This was done as a basic find and replace. Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Yury Norov <yury.norov@gmail.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> # powerpc Acked-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2022-10-11treewide: use get_random_u32() when possibleJason A. Donenfeld12-16/+16
The prandom_u32() function has been a deprecated inline wrapper around get_random_u32() for several releases now, and compiles down to the exact same code. Replace the deprecated wrapper with a direct call to the real function. The same also applies to get_random_int(), which is just a wrapper around get_random_u32(). This was done as a basic find and replace. Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Yury Norov <yury.norov@gmail.com> Reviewed-by: Jan Kara <jack@suse.cz> # for ext4 Acked-by: Toke Høiland-Jørgensen <toke@toke.dk> # for sch_cake Acked-by: Chuck Lever <chuck.lever@oracle.com> # for nfsd Acked-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> # for thunderbolt Acked-by: Darrick J. Wong <djwong@kernel.org> # for xfs Acked-by: Helge Deller <deller@gmx.de> # for parisc Acked-by: Heiko Carstens <hca@linux.ibm.com> # for s390 Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2022-10-11treewide: use prandom_u32_max() when possible, part 2Jason A. Donenfeld2-5/+3
Rather than incurring a division or requesting too many random bytes for the given range, use the prandom_u32_max() function, which only takes the minimum required bytes from the RNG and avoids divisions. This was done by hand, covering things that coccinelle could not do on its own. Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Yury Norov <yury.norov@gmail.com> Reviewed-by: Jan Kara <jack@suse.cz> # for ext2, ext4, and sbitmap Acked-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2022-10-11treewide: use prandom_u32_max() when possible, part 1Jason A. Donenfeld11-26/+25
Rather than incurring a division or requesting too many random bytes for the given range, use the prandom_u32_max() function, which only takes the minimum required bytes from the RNG and avoids divisions. This was done mechanically with this coccinelle script: @basic@ expression E; type T; identifier get_random_u32 =~ "get_random_int|prandom_u32|get_random_u32"; typedef u64; @@ ( - ((T)get_random_u32() % (E)) + prandom_u32_max(E) | - ((T)get_random_u32() & ((E) - 1)) + prandom_u32_max(E * XXX_MAKE_SURE_E_IS_POW2) | - ((u64)(E) * get_random_u32() >> 32) + prandom_u32_max(E) | - ((T)get_random_u32() & ~PAGE_MASK) + prandom_u32_max(PAGE_SIZE) ) @multi_line@ identifier get_random_u32 =~ "get_random_int|prandom_u32|get_random_u32"; identifier RAND; expression E; @@ - RAND = get_random_u32(); ... when != RAND - RAND %= (E); + RAND = prandom_u32_max(E); // Find a potential literal @literal_mask@ expression LITERAL; type T; identifier get_random_u32 =~ "get_random_int|prandom_u32|get_random_u32"; position p; @@ ((T)get_random_u32()@p & (LITERAL)) // Add one to the literal. @script:python add_one@ literal << literal_mask.LITERAL; RESULT; @@ value = None if literal.startswith('0x'): value = int(literal, 16) elif literal[0] in '123456789': value = int(literal, 10) if value is None: print("I don't know how to handle %s" % (literal)) cocci.include_match(False) elif value == 2**32 - 1 or value == 2**31 - 1 or value == 2**24 - 1 or value == 2**16 - 1 or value == 2**8 - 1: print("Skipping 0x%x for cleanup elsewhere" % (value)) cocci.include_match(False) elif value & (value + 1) != 0: print("Skipping 0x%x because it's not a power of two minus one" % (value)) cocci.include_match(False) elif literal.startswith('0x'): coccinelle.RESULT = cocci.make_expr("0x%x" % (value + 1)) else: coccinelle.RESULT = cocci.make_expr("%d" % (value + 1)) // Replace the literal mask with the calculated result. @plus_one@ expression literal_mask.LITERAL; position literal_mask.p; expression add_one.RESULT; identifier FUNC; @@ - (FUNC()@p & (LITERAL)) + prandom_u32_max(RESULT) @collapse_ret@ type T; identifier VAR; expression E; @@ { - T VAR; - VAR = (E); - return VAR; + return E; } @drop_var@ type T; identifier VAR; @@ { - T VAR; ... when != VAR } Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Yury Norov <yury.norov@gmail.com> Reviewed-by: KP Singh <kpsingh@kernel.org> Reviewed-by: Jan Kara <jack@suse.cz> # for ext4 and sbitmap Reviewed-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com> # for drbd Acked-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Heiko Carstens <hca@linux.ibm.com> # for s390 Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # for mmc Acked-by: Darrick J. Wong <djwong@kernel.org> # for xfs Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2022-10-11cifs: fix skipping to incorrect offset in emit_cached_direntsRonnie Sahlberg1-6/+23
When application has done lseek() to a different offset on a directory fd we skipped one entry too many before we start emitting directory entries from the cache. We need to also make sure that when we are starting to emit directory entries from the cache, the ->pos sequence might have holes and skip some indices. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Reviewed-by: Tom Talpey <tom@talpey.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-10-10Merge tag 'xfs-6.1-for-linus' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linuxLinus Torvalds21-98/+116
Pull xfs updates from Dave Chinner: "There are relatively few updates this cycle; half the cycle was eaten by a grue, the other half was eaten by a tricky data corruption issue that I still haven't entirely solved. Hence there's no major changes in this cycle and it's largely just minor cleanups and small bug fixes: - fixes for filesystem shutdown procedure during a DAX memory failure notification - bug fixes - logic cleanups - log message cleanups - updates to use vfs{g,u}id_t helpers where appropriate" * tag 'xfs-6.1-for-linus' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: xfs: on memory failure, only shut down fs after scanning all mappings xfs: rearrange the logic and remove the broken comment for xfs_dir2_isxx xfs: trim the mapp array accordingly in xfs_da_grow_inode_int xfs: do not need to check return value of xlog_kvmalloc() xfs: port to vfs{g,u}id_t and associated helpers xfs: remove xfs_setattr_time() declaration xfs: Remove the unneeded result variable xfs: missing space in xfs trace log xfs: simplify if-else condition in xfs_reflink_trim_around_shared xfs: simplify if-else condition in xfs_validate_new_dalign xfs: replace unnecessary seq_printf with seq_puts xfs: clean up "%Ld/%Lu" which doesn't meet C standard xfs: remove redundant else for clean code xfs: remove the redundant word in comment
2022-10-10Merge tag 'f2fs-for-6.1-rc1' of ↵Linus Torvalds22-199/+465
git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "This round looks fairly small comparing to the previous updates and includes mostly minor bug fixes. Nevertheless, as we've still interested in improving the stability, Chao added some debugging methods to diagnoze subtle runtime inconsistency problem. Enhancements: - store all the corruption or failure reasons in superblock - detect meta inode, summary info, and block address inconsistency - increase the limit for reserve_root for low-end devices - add the number of compressed IO in iostat Bug fixes: - DIO write fix for zoned devices - do out-of-place writes for cold files - fix some stat updates (FS_CP_DATA_IO, dirty page count) - fix race condition on setting FI_NO_EXTENT flag - fix data races when freezing super - fix wrong continue condition check in GC - do not allow ATGC for LFS mode In addition, there're some code enhancement and clean-ups as usual" * tag 'f2fs-for-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (32 commits) f2fs: change to use atomic_t type form sbi.atomic_files f2fs: account swapfile inodes f2fs: allow direct read for zoned device f2fs: support recording errors into superblock f2fs: support recording stop_checkpoint reason into super_block f2fs: remove the unnecessary check in f2fs_xattr_fiemap f2fs: introduce cp_status sysfs entry f2fs: fix to detect corrupted meta ino f2fs: fix to account FS_CP_DATA_IO correctly f2fs: code clean and fix a type error f2fs: add "c_len" into trace_f2fs_update_extent_tree_range for compressed file f2fs: fix to do sanity check on summary info f2fs: port to vfs{g,u}id_t and associated helpers f2fs: fix to do sanity check on destination blkaddr during recovery f2fs: let FI_OPU_WRITE override FADVISE_COLD_BIT f2fs: fix race condition on setting FI_NO_EXTENT flag f2fs: remove redundant check in f2fs_sanity_check_cluster f2fs: add static init_idisk_time function to reduce the code f2fs: fix typo f2fs: fix wrong dirty page count when race between mmap and fallocate. ...
2022-10-10Merge tag 'gfs2-nopid-for-v6.1' of ↵Linus Torvalds8-25/+247
git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 Pull gfs2 debugfs updates from Andreas Gruenbacher: - Improve the way how the state of glocks is reported in debugfs for glocks which are not held by processes, but rather by other resouces like cached inodes or flocks. * tag 'gfs2-nopid-for-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: gfs2: Mark the remaining process-independent glock holders as GL_NOPID gfs2: Mark flock glock holders as GL_NOPID gfs2: Add GL_NOPID flag for process-independent glock holders gfs2: Add flocks to glockfd debugfs file gfs2: Add glockfd debugfs file
2022-10-10Merge tag 'gfs2-v6.0-rc2-fixes' of ↵Linus Torvalds6-25/+77
git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 Pull gfs2 updates from Andreas Gruenbacher: - Make sure to initialize the filesystem work queues before registering the filesystem; this prevents them from being used uninitialized. - On filesystem withdraw: prevent a a double iput() and immediately reject pending locking requests that can no longer succeed. - Use TRY lock in gfs2_inode_lookup() to prevent a rare glock hang during evict. - During filesystem mount, explicitly make sure that the sb_bsize and sb_bsize_shift super block fields are consistent with each other. This prevents messy error messages during fuzz testing. - Switch from strlcpy to strscpy. * tag 'gfs2-v6.0-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: gfs2: Register fs after creating workqueues gfs2: Check sb_bsize_shift after reading superblock gfs2: Switch from strlcpy to strscpy gfs2: Clear flags when withdraw prevents xmote gfs2: Dequeue waiters when withdrawn gfs2: Prevent double iput for journal on error gfs2: Use TRY lock in gfs2_inode_lookup for UNLINKED inodes
2022-10-10Merge tag '6.1-rc-smb3-client-fixes-part1' of ↵Linus Torvalds29-424/+444
git://git.samba.org/sfrench/cifs-2.6 Pull cifs updates from Steve French: - data corruption fix when cache disabled - four RDMA (smbdirect) improvements, including enabling support for SoftiWARP - four signing improvements - three directory lease improvements - four cleanup fixes - minor security fix - two debugging improvements * tag '6.1-rc-smb3-client-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6: (21 commits) smb3: fix oops in calculating shash_setkey cifs: secmech: use shash_desc directly, remove sdesc smb3: rename encryption/decryption TFMs cifs: replace kfree() with kfree_sensitive() for sensitive data cifs: remove initialization value cifs: Replace a couple of one-element arrays with flexible-array members smb3: do not log confusing message when server returns no network interfaces smb3: define missing create contexts cifs: store a pointer to a fid in the cfid structure instead of the struct cifs: improve handlecaching cifs: Make tcon contain a wrapper structure cached_fids instead of cached_fid smb3: add dynamic trace points for tree disconnect Fix formatting of client smbdirect RDMA logging Handle variable number of SGEs in client smbdirect send. Reduce client smbdirect max receive segment size Decrease the number of SMB3 smbdirect client SGEs cifs: Fix the error length of VALIDATE_NEGOTIATE_INFO message cifs: destage dirty pages before re-reading them for cache=none cifs: return correct error in ->calc_signature() MAINTAINERS: Add Tom Talpey as cifs.ko reviewer ...
2022-10-10Merge tag 'nfsd-6.1-1' of ↵Linus Torvalds1-59/+29
git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux Pull more nfsd updates from Chuck Lever: - filecache code clean-ups * tag 'nfsd-6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: nfsd: rework hashtable handling in nfsd_do_file_acquire nfsd: fix nfsd_file_unhash_and_dispose
2022-10-10Merge tag 'pull-tmpfile' of ↵Linus Torvalds19-227/+262
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs tmpfile updates from Al Viro: "Miklos' ->tmpfile() signature change; pass an unopened struct file to it, let it open the damn thing. Allows to add tmpfile support to FUSE" * tag 'pull-tmpfile' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fuse: implement ->tmpfile() vfs: open inside ->tmpfile() vfs: move open right after ->tmpfile() vfs: make vfs_tmpfile() static ovl: use vfs_tmpfile_open() helper cachefiles: use vfs_tmpfile_open() helper cachefiles: only pass inode to *mark_inode_inuse() helpers cachefiles: tmpfile error handling cleanup hugetlbfs: cleanup mknod and tmpfile vfs: add vfs_tmpfile_open() helper
2022-10-10Merge tag 'mm-stable-2022-10-08' of ↵Linus Torvalds35-472/+643
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - Yu Zhao's Multi-Gen LRU patches are here. They've been under test in linux-next for a couple of months without, to my knowledge, any negative reports (or any positive ones, come to that). - Also the Maple Tree from Liam Howlett. An overlapping range-based tree for vmas. It it apparently slightly more efficient in its own right, but is mainly targeted at enabling work to reduce mmap_lock contention. Liam has identified a number of other tree users in the kernel which could be beneficially onverted to mapletrees. Yu Zhao has identified a hard-to-hit but "easy to fix" lockdep splat at [1]. This has yet to be addressed due to Liam's unfortunately timed vacation. He is now back and we'll get this fixed up. - Dmitry Vyukov introduces KMSAN: the Kernel Memory Sanitizer. It uses clang-generated instrumentation to detect used-unintialized bugs down to the single bit level. KMSAN keeps finding bugs. New ones, as well as the legacy ones. - Yang Shi adds a userspace mechanism (madvise) to induce a collapse of memory into THPs. - Zach O'Keefe has expanded Yang Shi's madvise(MADV_COLLAPSE) to support file/shmem-backed pages. - userfaultfd updates from Axel Rasmussen - zsmalloc cleanups from Alexey Romanov - cleanups from Miaohe Lin: vmscan, hugetlb_cgroup, hugetlb and memory-failure - Huang Ying adds enhancements to NUMA balancing memory tiering mode's page promotion, with a new way of detecting hot pages. - memcg updates from Shakeel Butt: charging optimizations and reduced memory consumption. - memcg cleanups from Kairui Song. - memcg fixes and cleanups from Johannes Weiner. - Vishal Moola provides more folio conversions - Zhang Yi removed ll_rw_block() :( - migration enhancements from Peter Xu - migration error-path bugfixes from Huang Ying - Aneesh Kumar added ability for a device driver to alter the memory tiering promotion paths. For optimizations by PMEM drivers, DRM drivers, etc. - vma merging improvements from Jakub Matěn. - NUMA hinting cleanups from David Hildenbrand. - xu xin added aditional userspace visibility into KSM merging activity. - THP & KSM code consolidation from Qi Zheng. - more folio work from Matthew Wilcox. - KASAN updates from Andrey Konovalov. - DAMON cleanups from Kaixu Xia. - DAMON work from SeongJae Park: fixes, cleanups. - hugetlb sysfs cleanups from Muchun Song. - Mike Kravetz fixes locking issues in hugetlbfs and in hugetlb core. Link: https://lkml.kernel.org/r/CAOUHufZabH85CeUN-MEMgL8gJGzJEWUrkiM58JkTbBhh-jew0Q@mail.gmail.com [1] * tag 'mm-stable-2022-10-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (555 commits) hugetlb: allocate vma lock for all sharable vmas hugetlb: take hugetlb vma_lock when clearing vma_lock->vma pointer hugetlb: fix vma lock handling during split vma and range unmapping mglru: mm/vmscan.c: fix imprecise comments mm/mglru: don't sync disk for each aging cycle mm: memcontrol: drop dead CONFIG_MEMCG_SWAP config symbol mm: memcontrol: use do_memsw_account() in a few more places mm: memcontrol: deprecate swapaccounting=0 mode mm: memcontrol: don't allocate cgroup swap arrays when memcg is disabled mm/secretmem: remove reduntant return value mm/hugetlb: add available_huge_pages() func mm: remove unused inline functions from include/linux/mm_inline.h selftests/vm: add selftest for MADV_COLLAPSE of uffd-minor memory selftests/vm: add file/shmem MADV_COLLAPSE selftest for cleared pmd selftests/vm: add thp collapse shmem testing selftests/vm: add thp collapse file and tmpfs testing selftests/vm: modularize thp collapse memory operations selftests/vm: dedup THP helpers mm/khugepaged: add tracepoint to hpage_collapse_scan_file() mm/madvise: add file and shmem support to MADV_COLLAPSE ...
2022-10-10Merge tag 'xtensa-20221010' of https://github.com/jcmvbkbc/linux-xtensaLinus Torvalds1-1/+1
Pull xtensa updates from Max Filippov: - add support for FDPIC and static PIE executable formats for noMMU * tag 'xtensa-20221010' of https://github.com/jcmvbkbc/linux-xtensa: xtensa: add FDPIC and static PIE support for noMMU xtensa: clean up ELF_PLAT_INIT macro
2022-10-10Merge tag 'bitmap-6.1-rc1' of https://github.com/norov/linuxLinus Torvalds1-2/+2
Pull bitmap updates from Yury Norov: - Fix unsigned comparison to -1 in CPUMAP_FILE_MAX_BYTES (Phil Auld) - cleanup nr_cpu_ids vs nr_cpumask_bits mess (me) This series cleans that mess and adds new config FORCE_NR_CPUS that allows to optimize cpumask subsystem if the number of CPUs is known at compile-time. - optimize find_bit() functions (me) Reworks find_bit() functions based on new FIND_{FIRST,NEXT}_BIT() macros. - add find_nth_bit() (me) Adds find_nth_bit(), which is ~70 times faster than bitcounting with for_each() loop: for_each_set_bit(bit, mask, size) if (n-- == 0) return bit; Also adds bitmap_weight_and() to let people replace this pattern: tmp = bitmap_alloc(nbits); bitmap_and(tmp, map1, map2, nbits); weight = bitmap_weight(tmp, nbits); bitmap_free(tmp); with a single bitmap_weight_and() call. - repair cpumask_check() (me) After switching cpumask to use nr_cpu_ids, cpumask_check() started generating many false-positive warnings. This series fixes it. - Add for_each_cpu_andnot() and for_each_cpu_andnot() (Valentin Schneider) Extends the API with one more function and applies it in sched/core. * tag 'bitmap-6.1-rc1' of https://github.com/norov/linux: (28 commits) sched/core: Merge cpumask_andnot()+for_each_cpu() into for_each_cpu_andnot() lib/test_cpumask: Add for_each_cpu_and(not) tests cpumask: Introduce for_each_cpu_andnot() lib/find_bit: Introduce find_next_andnot_bit() cpumask: fix checking valid cpu range lib/bitmap: add tests for for_each() loops lib/find: optimize for_each() macros lib/bitmap: introduce for_each_set_bit_wrap() macro lib/find_bit: add find_next{,_and}_bit_wrap cpumask: switch for_each_cpu{,_not} to use for_each_bit() net: fix cpu_max_bits_warn() usage in netif_attrmask_next{,_and} cpumask: add cpumask_nth_{,and,andnot} lib/bitmap: remove bitmap_ord_to_pos lib/bitmap: add tests for find_nth_bit() lib: add find_nth{,_and,_andnot}_bit() lib/bitmap: add bitmap_weight_and() lib/bitmap: don't call __bitmap_weight() in kernel code tools: sync find_bit() implementation lib/find_bit: optimize find_next_bit() functions lib/find_bit: create find_first_zero_bit_le() ...
2022-10-10Merge tag 'sysctl-6.1-rc1' of ↵Linus Torvalds1-8/+1
git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux Pull sysctl updates from Luis Chamberlain: "Just some boring cleanups on the sysctl front for this release" * tag 'sysctl-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux: kernel/sysctl-test: use SYSCTL_{ZERO/ONE_HUNDRED} instead of i_{zero/one_hundred} kernel/sysctl.c: move sysctl_vals and sysctl_long_vals to sysctl.c sysctl: remove max_extfrag_threshold kernel/sysctl.c: remove unnecessary (void*) conversions proc: remove initialization assignment
2022-10-10Merge tag 'printk-for-6.1' of ↵Linus Torvalds1-2/+0
git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux Pull printk updates from Petr Mladek: - Initialize pointer hashing using the system workqueue. It avoids taking locks in printk()/vsprintf() code path - Misc code clean up * tag 'printk-for-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: printk: Mark __printk percpu data ready __ro_after_init printk: Remove bogus comment vs. boot consoles printk: Remove write only variable nr_ext_console_drivers printk: Declare log_wait properly printk: Make pr_flush() static lib/vsprintf: Initialize vsprintf's pointer hash once the random core is ready. lib/vsprintf: Remove static_branch_likely() from __ptr_to_hashval(). lib/vnsprintf: add const modifier for param 'bitmap'
2022-10-10Merge tag 'sched-rt-2022-10-05' of ↵Linus Torvalds1-11/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull preempt RT updates from Thomas Gleixner: "Introduce preempt_[dis|enable_nested() and use it to clean up various places which have open coded PREEMPT_RT conditionals. On PREEMPT_RT enabled kernels, spinlocks and rwlocks are neither disabling preemption nor interrupts. Though there are a few places which depend on the implicit preemption/interrupt disable of those locks, e.g. seqcount write sections, per CPU statistics updates etc. PREEMPT_RT added open coded CONFIG_PREEMPT_RT conditionals to disable/enable preemption in the related code parts all over the place. That's hard to read and does not really explain why this is necessary. Linus suggested to use helper functions (preempt_disable_nested() and preempt_enable_nested()) and use those in the affected places. On !RT enabled kernels these functions are NOPs, but contain a lockdep assert to validate that preemption is actually disabled to catch call sites which do not have preemption disabled. Clean up the affected code paths in mm, dentry and lib" * tag 'sched-rt-2022-10-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: u64_stats: Streamline the implementation flex_proportions: Disable preemption entering the write section. mm/compaction: Get rid of RT ifdeffery mm/memcontrol: Replace the PREEMPT_RT conditionals mm/debug: Provide VM_WARN_ON_IRQS_ENABLED() mm/vmstat: Use preempt_[dis|en]able_nested() dentry: Use preempt_[dis|en]able_nested() preempt: Provide preempt_[dis|en]able_nested()
2022-10-10Merge tag 'sched-core-2022-10-07' of ↵Linus Torvalds10-32/+31
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler updates from Ingo Molnar: "Debuggability: - Change most occurances of BUG_ON() to WARN_ON_ONCE() - Reorganize & fix TASK_ state comparisons, turn it into a bitmap - Update/fix misc scheduler debugging facilities Load-balancing & regular scheduling: - Improve the behavior of the scheduler in presence of lot of SCHED_IDLE tasks - in particular they should not impact other scheduling classes. - Optimize task load tracking, cleanups & fixes - Clean up & simplify misc load-balancing code Freezer: - Rewrite the core freezer to behave better wrt thawing and be simpler in general, by replacing PF_FROZEN with TASK_FROZEN & fixing/adjusting all the fallout. Deadline scheduler: - Fix the DL capacity-aware code - Factor out dl_task_is_earliest_deadline() & replenish_dl_new_period() - Relax/optimize locking in task_non_contending() Cleanups: - Factor out the update_current_exec_runtime() helper - Various cleanups, simplifications" * tag 'sched-core-2022-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (41 commits) sched: Fix more TASK_state comparisons sched: Fix TASK_state comparisons sched/fair: Move call to list_last_entry() in detach_tasks sched/fair: Cleanup loop_max and loop_break sched/fair: Make sure to try to detach at least one movable task sched: Show PF_flag holes freezer,sched: Rewrite core freezer logic sched: Widen TAKS_state literals sched/wait: Add wait_event_state() sched/completion: Add wait_for_completion_state() sched: Add TASK_ANY for wait_task_inactive() sched: Change wait_task_inactive()s match_state freezer,umh: Clean up freezer/initrd interaction freezer: Have {,un}lock_system_sleep() save/restore flags sched: Rename task_running() to task_on_cpu() sched/fair: Cleanup for SIS_PROP sched/fair: Default to false in test_idle_cores() sched/fair: Remove useless check in select_idle_core() sched/fair: Avoid double search on same cpu sched/fair: Remove redundant check in select_idle_smt() ...
2022-10-09Merge tag 'ucount-rlimits-cleanups-for-v5.19' of ↵Linus Torvalds2-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull ucounts update from Eric Biederman: "Split rlimit and ucount values and max values After the ucount rlimit code was merged a bunch of small but siginificant bugs were found and fixed. At the time it was realized that part of the problem was that while the ucount rlimits were very similar to the oridinary ucounts (in being nested counts with limits) the semantics were slightly different and the code would be less error prone if there was less sharing. This is the long awaited cleanup that should hopefully keep things more comprehensible and less error prone for whoever needs to touch that code next" * tag 'ucount-rlimits-cleanups-for-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: ucounts: Split rlimit and ucount values and max values
2022-10-09Merge tag 'signal-for-v5.20' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull ptrace update from Eric Biederman: "ptrace: Stop supporting SIGKILL for PTRACE_EVENT_EXIT Recently I had a conversation where it was pointed out to me that SIGKILL sent to a tracee stropped in PTRACE_EVENT_EXIT is quite difficult for a tracer to handle. Keeping SIGKILL working after the process has been killed is pain from an implementation point of view. So since the debuggers don't want this behavior let's see if we can remove this wart for the userspace API If a regression is detected it should only need to be the last change that is the reverted. The other two are just general cleanups that make the last patch simpler" * tag 'signal-for-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: signal: Drop signals received after a fatal signal has been processed signal: Guarantee that SIGNAL_GROUP_EXIT is set on process exit signal: Ensure SIGNAL_GROUP_EXIT gets set in do_group_exit