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2020-12-14Merge tag 'locking-core-2020-12-14' of ↵Linus Torvalds1-17/+34
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking updates from Thomas Gleixner: "A moderate set of locking updates: - A few extensions to the rwsem API and support for opportunistic spinning and lock stealing - lockdep selftest improvements - Documentation updates - Cleanups and small fixes all over the place" * tag 'locking-core-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits) seqlock: kernel-doc: Specify when preemption is automatically altered seqlock: Prefix internal seqcount_t-only macros with a "do_" Documentation: seqlock: s/LOCKTYPE/LOCKNAME/g locking/rwsem: Remove reader optimistic spinning locking/rwsem: Enable reader optimistic lock stealing locking/rwsem: Prevent potential lock starvation locking/rwsem: Pass the current atomic count to rwsem_down_read_slowpath() locking/rwsem: Fold __down_{read,write}*() locking/rwsem: Introduce rwsem_write_trylock() locking/rwsem: Better collate rwsem_read_trylock() rwsem: Implement down_read_interruptible rwsem: Implement down_read_killable_nested refcount: Fix a kernel-doc markup completion: Drop init_completion define atomic: Update MAINTAINERS atomic: Delete obsolete documentation seqlock: Rename __seqprop() users lockdep/selftest: Add spin_nest_lock test lockdep/selftests: Fix PROVE_RAW_LOCK_NESTING seqlock: avoid -Wshadow warnings ...
2020-12-14Merge tag 's390-5.11-1' of ↵Linus Torvalds1-9/+0
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Heiko Carstens: - Add support for the hugetlb_cma command line option to allocate gigantic hugepages using CMA - Add arch_get_random_long() support. - Add ap bus userspace notifications. - Increase default size of vmalloc area to 512GB and otherwise let it increase dynamically by the size of physical memory. This should fix all occurrences where the vmalloc area was not large enough. - Completely get rid of set_fs() (aka select SET_FS) and rework address space handling while doing that; making address space handling much more simple. - Reimplement getcpu vdso syscall in C. - Add support for extended SCLP responses (> 4k). This allows e.g. to handle also potential large system configurations. - Simplify KASAN by removing 3-level page table support and only supporting 4-levels from now on. - Improve debug-ability of the kernel decompressor code, which now prints also stack traces and symbols in case of problems to the console. - Remove more power management leftovers. - Other various fixes and improvements all over the place. * tag 's390-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (62 commits) s390/mm: add support to allocate gigantic hugepages using CMA s390/crypto: add arch_get_random_long() support s390/smp: perform initial CPU reset also for SMT siblings s390/mm: use invalid asce for user space when switching to init_mm s390/idle: fix accounting with machine checks s390/idle: add missing mt_cycles calculation s390/boot: add build-id to decompressor s390/kexec_file: fix diag308 subcode when loading crash kernel s390/cio: fix use-after-free in ccw_device_destroy_console s390/cio: remove pm support from ccw bus driver s390/cio: remove pm support from css-bus driver s390/cio: remove pm support from IO subchannel drivers s390/cio: remove pm support from chsc subchannel driver s390/vmur: remove unused pm related functions s390/tape: remove unsupported PM functions s390/cio: remove pm support from eadm-sch drivers s390: remove pm support from console drivers s390/dasd: remove unused pm related functions s390/zfcp: remove pm support from zfcp driver s390/ap: let bus_register() add the AP bus sysfs attributes ...
2020-12-14Merge branch 'linus' of ↵Linus Torvalds7-159/+68
git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto updates from Herbert Xu: "API: - Add speed testing on 1420-byte blocks for networking Algorithms: - Improve performance of chacha on ARM for network packets - Improve performance of aegis128 on ARM for network packets Drivers: - Add support for Keem Bay OCS AES/SM4 - Add support for QAT 4xxx devices - Enable crypto-engine retry mechanism in caam - Enable support for crypto engine on sdm845 in qce - Add HiSilicon PRNG driver support" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (161 commits) crypto: qat - add capability detection logic in qat_4xxx crypto: qat - add AES-XTS support for QAT GEN4 devices crypto: qat - add AES-CTR support for QAT GEN4 devices crypto: atmel-i2c - select CONFIG_BITREVERSE crypto: hisilicon/trng - replace atomic_add_return() crypto: keembay - Add support for Keem Bay OCS AES/SM4 dt-bindings: Add Keem Bay OCS AES bindings crypto: aegis128 - avoid spurious references crypto_aegis128_update_simd crypto: seed - remove trailing semicolon in macro definition crypto: x86/poly1305 - Use TEST %reg,%reg instead of CMP $0,%reg crypto: x86/sha512 - Use TEST %reg,%reg instead of CMP $0,%reg crypto: aesni - Use TEST %reg,%reg instead of CMP $0,%reg crypto: cpt - Fix sparse warnings in cptpf hwrng: ks-sa - Add dependency on IOMEM and OF crypto: lib/blake2s - Move selftest prototype into header file crypto: arm/aes-ce - work around Cortex-A57/A72 silion errata crypto: ecdh - avoid unaligned accesses in ecdh_set_secret() crypto: ccree - rework cache parameters handling crypto: cavium - Use dma_set_mask_and_coherent to simplify code crypto: marvell/octeontx - Use dma_set_mask_and_coherent to simplify code ...
2020-12-14Merge tag 'drm-next-2020-12-11' of git://anongit.freedesktop.org/drm/drmLinus Torvalds13-0/+13
Pull drm updates from Dave Airlie: "Not a huge amount of big things here, AMD has support for a few new HW variants (vangogh, green sardine, dimgrey cavefish), Intel has some more DG1 enablement. We have a few big reworks of the TTM layers and interfaces, GEM and atomic internal API reworks cross tree. fbdev is marked orphaned in here as well to reflect the current reality. core: - documentation updates - deprecate DRM_FORMAT_MOD_NONE - atomic crtc enable/disable rework - GEM convert drivers to gem object functions - remove SCATTER_LIST_MAX_SEGMENT sched: - avoid infinite waits ttm: - remove AGP support - don't modify caching for swapout - ttm pinning rework - major TTM reworks - new backend allocator - multihop support vram-helper: - top down BO placement fix - TTM changes - GEM object support displayport: - DP 2.0 DPCD prep work - DP MST extended DPCD caps fbdev: - mark as orphaned amdgpu: - Initial Vangogh support - Green Sardine support - Dimgrey Cavefish support - SG display support for renoir - SMU7 improvements - gfx9+ modiifier support - CI BACO fixes radeon: - expose voltage via hwmon on SUMO amdkfd: - fix unique id handling i915: - more DG1 enablement - bigjoiner support - integer scaling filter support - async flip support - ICL+ DSI command mode - Improve display shutdown - Display refactoring - eLLC machine fbdev loading fix - dma scatterlist fixes - TGL hang fixes - eLLC display buffer caching on SKL+ - MOCS PTE seeting for gen9+ msm: - Shutdown hook - GPU cooling device support - DSI 7nm and 10nm phy/pll updates - sm8150/sm2850 DPU support - GEM locking re-work - LLCC system cache support aspeed: - sysfs output config support ast: - LUT fix - new display mode gma500: - remove 2d framebuffer accel panfrost: - move gpu reset to a worker exynos: - new HDMI mode support mediatek: - MT8167 support - yaml bindings - MIPI DSI phy code moved etnaviv: - new perf counter - more lockdep annotation hibmc: - i2c DDC support ingenic: - pixel clock reset fix - reserved memory support - allow both DMA channels at once - different pixel format support - 30/24/8-bit palette modes tilcdc: - don't keep vblank irq enabled vc4: - new maintainer added - DSI registration fix virtio: - blob resource support - host visible and cross-device support - uuid api support" * tag 'drm-next-2020-12-11' of git://anongit.freedesktop.org/drm/drm: (1754 commits) drm/amdgpu: Initialise drm_gem_object_funcs for imported BOs drm/amdgpu: fix size calculation with stolen vga memory drm/amdgpu: remove amdgpu_ttm_late_init and amdgpu_bo_late_init drm/amdgpu: free the pre-OS console framebuffer after the first modeset drm/amdgpu: enable runtime pm using BACO on CI dGPUs drm/amdgpu/cik: enable BACO reset on Bonaire drm/amd/pm: update smu10.h WORKLOAD_PPLIB setting for raven drm/amd/pm: remove one unsupported smu function for vangogh drm/amd/display: setup system context for APUs drm/amd/display: add S/G support for Vangogh drm/amdkfd: Fix leak in dmabuf import drm/amdgpu: use AMDGPU_NUM_VMID when possible drm/amdgpu: fix sdma instance fw version and feature version init drm/amd/pm: update driver if version for dimgrey_cavefish drm/amd/display: 3.2.115 drm/amd/display: [FW Promotion] Release 0.0.45 drm/amd/display: Revert DCN2.1 dram_clock_change_latency update drm/amd/display: Enable gpu_vm_support for dcn3.01 drm/amd/display: Fixed the audio noise during mode switching with HDCP mode on drm/amd/display: Add wm table for Renoir ...
2020-12-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski2-1/+5
xdp_return_frame_bulk() needs to pass a xdp_buff to __xdp_return(). strlcpy got converted to strscpy but here it makes no functional difference, so just keep the right code. Conflicts: net/netfilter/nf_tables_api.c Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-11selftest/fpu: avoid clang warningArnd Bergmann1-1/+2
With extra warnings enabled, clang complains about the redundant -mhard-float argument: clang: error: argument unused during compilation: '-mhard-float' [-Werror,-Wunused-command-line-argument] Move this into the gcc-only part of the Makefile. Link: https://lkml.kernel.org/r/20201203223652.1320700-1-arnd@kernel.org Fixes: 4185b3b92792 ("selftests/fpu: Add an FPU selftest") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Nathan Chancellor <natechancellor@gmail.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Petteri Aimonen <jpa@git.mail.kapsi.fi> Cc: Borislav Petkov <bp@suse.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-11Add and use a generic version of devmem_is_allowed()Palmer Dabbelt4-1/+33
As part of adding STRICT_DEVMEM support to the RISC-V port, Zong provided an implementation of devmem_is_allowed() that's exactly the same as the version in a handful of other ports. Rather than duplicate code, I've put a generic version of this in lib/ and used it for the RISC-V port. * palmer/generic-devmem: arm64: Use the generic devmem_is_allowed() arm: Use the generic devmem_is_allowed() RISC-V: Use the new generic devmem_is_allowed() lib: Add a generic version of devmem_is_allowed()
2020-12-11lib: Add a generic version of devmem_is_allowed()Palmer Dabbelt4-1/+33
As part of adding support for STRICT_DEVMEM to the RISC-V port, Zong provided a devmem_is_allowed() implementation that's exactly the same as all the others I checked. Instead I'm adding a generic version, which will soon be used. Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-12-09dyndbg: fix use before null checkJim Cromie1-2/+7
In commit a2d375eda771 ("dyndbg: refine export, rename to dynamic_debug_exec_queries()"), a string is copied before checking it isn't NULL. Fix this, report a usage/interface error, and return the proper error code. Fixes: a2d375eda771 ("dyndbg: refine export, rename to dynamic_debug_exec_queries()") Cc: stable@vger.kernel.org -- -v2 drop comment tweak, improve commit message Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Link: https://lore.kernel.org/r/20201209183625.2432329-1-jim.cromie@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-12-09Merge branch 'locking/rwsem'Peter Zijlstra1-2/+17
2020-12-07sbitmap: simplify wrap checkPavel Begunkov1-3/+5
__sbitmap_get_word() doesn't warp if it's starting from the beginning (i.e. initial hint is 0). Instead of stashing the original hint just set @wrap accordingly. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-12-07sbitmap: replace CAS with atomic andPavel Begunkov1-5/+3
sbitmap_deferred_clear() does CAS loop to propagate cleared bits, replace it with equivalent atomic bitwise and. That's slightly faster and makes wait-free instead of lock-free as before. The atomic can be relaxed (i.e. barrier-less) because following sbitmap_get*() deal with synchronisation, see comments in sbitmap_queue_clear(). It's ok to cast to atomic_long_t, that's what bitops/lock.h does. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-12-07sbitmap: remove swap_lockPavel Begunkov1-11/+3
map->swap_lock protects map->cleared from concurrent modification, however sbitmap_deferred_clear() is already atomically drains it, so it's guaranteed to not loose bits on concurrent sbitmap_deferred_clear(). A one threaded tag heavy test on top of nullbk showed ~1.5% t-put increase, and 3% -> 1% cycle reduction of sbitmap_get() according to perf. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-12-07sbitmap: optimise sbitmap_deferred_clear()Pavel Begunkov1-12/+12
Because of spinlocks and atomics sbitmap_deferred_clear() have to reload &sb->map[index] on each access even though the map address won't change. Pass in sbitmap_word instead of {sb, index}, so it's cached in a variable. It also improves code generation of sbitmap_find_bit_in_index(). Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Reviewed-by: John Garry <john.garry@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-12-06zlib: export S390 symbols for zlib modulesRandy Dunlap1-0/+3
Fix build errors when ZLIB_INFLATE=m and ZLIB_DEFLATE=m and ZLIB_DFLTCC=y by exporting the 2 needed symbols in dfltcc_inflate.c. Fixes these build errors: ERROR: modpost: "dfltcc_inflate" [lib/zlib_inflate/zlib_inflate.ko] undefined! ERROR: modpost: "dfltcc_can_inflate" [lib/zlib_inflate/zlib_inflate.ko] undefined! Fixes: 126196100063 ("lib/zlib: add s390 hardware support for kernel zlib_inflate") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Ilya Leoshkevich <iii@linux.ibm.com> Cc: Mikhail Zaslonko <zaslonko@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Link: https://lkml.kernel.org/r/20201123191712.4882-1-rdunlap@infradead.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-04crypto: lib/blake2s - Move selftest prototype into header fileHerbert Xu2-3/+1
This patch fixes a missing prototype warning on blake2s_selftest. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-12-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-2/+9
Conflicts: drivers/net/ethernet/ibm/ibmvnic.c Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-03lib/syscall: fix syscall registers retrieval on 32-bit platformsWilly Tarreau1-2/+9
Lilith >_> and Claudio Bozzato of Cisco Talos security team reported that collect_syscall() improperly casts the syscall registers to 64-bit values leaking the uninitialized last 24 bytes on 32-bit platforms, that are visible in /proc/self/syscall. The cause is that info->data.args are u64 while syscall_get_arguments() uses longs, as hinted by the bogus pointer cast in the function. Let's just proceed like the other call places, by retrieving the registers into an array of longs before assigning them to the caller's array. This was successfully tested on x86_64, i386 and ppc32. Reference: CVE-2020-28588, TALOS-2020-1211 Fixes: 631b7abacd02 ("ptrace: Remove maxargs from task_current_syscall()") Cc: Greg KH <greg@kroah.com> Reviewed-by: Kees Cook <keescook@chromium.org> Tested-by: Michael Ellerman <mpe@ellerman.id.au> (ppc32) Signed-off-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-03lockdep/selftest: Add spin_nest_lock testBoqun Feng1-0/+17
Add a self test case to test the behavior for the following case: lock(A); lock_nest_lock(C1, A); lock(B); lock_nest_lock(C2, A); This is a reproducer for a problem[1] reported by Chris Wilson, and is helpful to prevent this. [1]: https://lore.kernel.org/lkml/160390684819.31966.12048967113267928793@build.alporthouse.com/ Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20201102053743.450459-2-boqun.feng@gmail.com
2020-12-03lockdep/selftests: Fix PROVE_RAW_LOCK_NESTINGPeter Zijlstra1-17/+17
The selftest nests rwlock_t inside raw_spinlock_t, this is invalid. Reported-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
2020-12-02kunit: Support for Parameterized TestingArpitha Raghunandan1-13/+46
Implementation of support for parameterized testing in KUnit. This approach requires the creation of a test case using the KUNIT_CASE_PARAM() macro that accepts a generator function as input. This generator function should return the next parameter given the previous parameter in parameterized tests. It also provides a macro to generate common-case generators based on arrays. Generators may also optionally provide a human-readable description of parameters, which is displayed where available. Note, currently the result of each parameter run is displayed in diagnostic lines, and only the overall test case output summarizes TAP-compliant success or failure of all parameter runs. In future, when supported by kunit-tool, these can be turned into subsubtest outputs. Signed-off-by: Arpitha Raghunandan <98.arpi@gmail.com> Co-developed-by: Marco Elver <elver@google.com> Signed-off-by: Marco Elver <elver@google.com> Reviewed-by: David Gow <davidgow@google.com> Tested-by: David Gow <davidgow@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2020-12-02Compiler Attributes: remove CONFIG_ENABLE_MUST_CHECKMasahiro Yamada1-8/+0
Revert commit cebc04ba9aeb ("add CONFIG_ENABLE_MUST_CHECK"). A lot of warn_unused_result warnings existed in 2006, but until now they have been fixed thanks to people doing allmodconfig tests. Our goal is to always enable __must_check where appropriate, so this CONFIG option is no longer needed. I see a lot of defconfig (arch/*/configs/*_defconfig) files having: # CONFIG_ENABLE_MUST_CHECK is not set I did not touch them for now since it would be a big churn. If arch maintainers want to clean them up, please go ahead. While I was here, I also moved __must_check to compiler_attributes.h from compiler_types.h Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> Acked-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> [Moved addition in compiler_attributes.h to keep it sorted] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-12-01net: switch to storing KCOV handle directly in sk_buffMarco Elver1-1/+0
It turns out that usage of skb extensions can cause memory leaks. Ido Schimmel reported: "[...] there are instances that blindly overwrite 'skb->extensions' by invoking skb_copy_header() after __alloc_skb()." Therefore, give up on using skb extensions for KCOV handle, and instead directly store kcov_handle in sk_buff. Fixes: 6370cc3bbd8a ("net: add kcov handle to skb extensions") Fixes: 85ce50d337d1 ("net: kcov: don't select SKB_EXTENSIONS when there is no NET") Fixes: 97f53a08cba1 ("net: linux/skbuff.h: combine SKB_EXTENSIONS + KCOV handling") Link: https://lore.kernel.org/linux-wireless/20201121160941.GA485907@shredder.lan/ Reported-by: Ido Schimmel <idosch@idosch.org> Signed-off-by: Marco Elver <elver@google.com> Link: https://lore.kernel.org/r/20201125224840.2014773-1-elver@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-27Merge branch 'linus' into sched/core, to resolve semantic conflictIngo Molnar18-62/+140
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-11-24mm/highmem: Provide CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAPThomas Gleixner1-0/+14
CONFIG_DEBUG_KMAP_LOCAL, which is selected by CONFIG_DEBUG_HIGHMEM is only providing guard pages, but does not provide a mechanism to enforce the usage of the kmap_local() infrastructure. Provide CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP which forces the temporary mapping even for lowmem pages. This needs to be a seperate config switch because this only works on architectures which do not have cache aliasing problems. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20201118204007.028261233@linutronix.de
2020-11-24mm/highmem: Provide and use CONFIG_DEBUG_KMAP_LOCALThomas Gleixner1-0/+8
CONFIG_KMAP_LOCAL can be enabled by x86/32bit even if CONFIG_HIGHMEM is not enabled for temporary MMIO space mappings. Provide it as a seperate config option which depends on CONFIG_KMAP_LOCAL and let CONFIG_DEBUG_HIGHMEM select it. This won't increase the debug coverage of this significantly but it paves the way to do so. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20201118204006.869487226@linutronix.de
2020-11-24Merge branch 'sched/core' into core/mmThomas Gleixner3-0/+25
Pull the migrate disable mechanics which is a prerequisite for preemptible kmap_local().
2020-11-24sched: Make migrate_disable/enable() independent of RTThomas Gleixner1-1/+1
Now that the scheduler can deal with migrate disable properly, there is no real compelling reason to make it only available for RT. There are quite some code pathes which needlessly disable preemption in order to prevent migration and some constructs like kmap_atomic() enforce it implicitly. Making it available independent of RT allows to provide a preemptible variant of kmap_atomic() and makes the code more consistent in general. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Grudgingly-Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20201118204007.269943012@linutronix.de
2020-11-20crypto: lib/curve25519 - Move selftest prototype into header fileHerbert Xu1-2/+0
This patch moves the curve25519_selftest into curve25519.h so we don't get a warning from gcc complaining about a missing prototype. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-11-20crypto: sha - split sha.h into sha1.h and sha2.hEric Biggers3-3/+3
Currently <crypto/sha.h> contains declarations for both SHA-1 and SHA-2, and <crypto/sha3.h> contains declarations for SHA-3. This organization is inconsistent, but more importantly SHA-1 is no longer considered to be cryptographically secure. So to the extent possible, SHA-1 shouldn't be grouped together with any of the other SHA versions, and usage of it should be phased out. Therefore, split <crypto/sha.h> into two headers <crypto/sha1.h> and <crypto/sha2.h>, and make everyone explicitly specify whether they want the declarations for SHA-1, SHA-2, or both. This avoids making the SHA-1 declarations visible to files that don't want anything to do with SHA-1. It also prepares for potentially moving sha1.h into a new insecure/ or dangerous/ directory. Signed-off-by: Eric Biggers <ebiggers@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-11-19Merge https://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-2/+17
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-19lib/strncpy_from_user.c: Mask out bytes after NUL terminator.Daniel Xu1-2/+17
do_strncpy_from_user() may copy some extra bytes after the NUL terminator into the destination buffer. This usually does not matter for normal string operations. However, when BPF programs key BPF maps with strings, this matters a lot. A BPF program may read strings from user memory by calling the bpf_probe_read_user_str() helper which eventually calls do_strncpy_from_user(). The program can then key a map with the destination buffer. BPF map keys are fixed-width and string-agnostic, meaning that map keys are treated as a set of bytes. The issue is when do_strncpy_from_user() overcopies bytes after the NUL terminator, it can result in seemingly identical strings occupying multiple slots in a BPF map. This behavior is subtle and totally unexpected by the user. This commit masks out the bytes following the NUL while preserving long-sized stride in the fast path. Fixes: 6ae08ae3dea2 ("bpf: Add probe_read_{user, kernel} and probe_read_{user, kernel}_str helpers") Signed-off-by: Daniel Xu <dxu@dxuuu.xyz> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/21efc982b3e9f2f7b0379eed642294caaa0c27a7.1605642949.git.dxu@dxuuu.xyz
2020-11-19lib: Fix fall-through warnings for ClangGustavo A. R. Silva7-13/+18
In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple warnings by explicitly adding multiple break statements instead of letting the code fall through to the next case, and by replacing a number of /* fall through */ comments with the new pseudo-keyword macro fallthrough. Notice that Clang doesn't recognize /* Fall through */ comments as implicit fall-through markings. Link: https://github.com/KSPP/linux/issues/115 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-11-18Revert "lib: Revert use of fallthrough pseudo-keyword in lib/"Nick Desaulniers16-64/+64
This reverts commit 6a9dc5fd6170 ("lib: Revert use of fallthrough pseudo-keyword in lib/") Now that we can build arch/powerpc/boot/ free of -Wimplicit-fallthrough, re-enable these fixes for lib/. Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Link: https://github.com/ClangBuiltLinux/linux/issues/236 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-11-17resource: Add test cases for new resource APIAndy Shevchenko1-0/+11
Add test cases for newly added resource APIs. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-11-16treewide: rename nla_strlcpy to nla_strscpy.Francis Laniel1-3/+3
Calls to nla_strlcpy are now replaced by calls to nla_strscpy which is the new name of this function. Signed-off-by: Francis Laniel <laniel_francis@privacyrequired.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16Modify return value of nla_strlcpy to match that of strscpy.Francis Laniel1-14/+25
nla_strlcpy now returns -E2BIG if src was truncated when written to dst. It also returns this error value if dstsize is 0 or higher than INT_MAX. For example, if src is "foo\0" and dst is 3 bytes long, the result will be: 1. "foG" after memcpy (G means garbage). 2. "fo\0" after memset. 3. -E2BIG is returned because src was not completely written into dst. The callers of nla_strlcpy were modified to take into account this modification. Signed-off-by: Francis Laniel <laniel_francis@privacyrequired.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16Fix unefficient call to memset before memcpu in nla_strlcpy.Francis Laniel1-1/+2
Before this commit, nla_strlcpy first memseted dst to 0 then wrote src into it. This is inefficient because bytes whom number is less than src length are written twice. This patch solves this issue by first writing src into dst then fill dst with 0's. Note that, in the case where src length is higher than dst, only 0 is written. Otherwise there are as many 0's written to fill dst. For example, if src is "foo\0" and dst is 5 bytes long, the result will be: 1. "fooGG" after memcpy (G means garbage). 2. "foo\0\0" after memset. Signed-off-by: Francis Laniel <laniel_francis@privacyrequired.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16Fonts: Add charcount field to font_descPeilin Ye13-0/+13
Subsystems are hard-coding the number of characters of our built-in fonts as 256. Include that information in our kernel font descriptor, `struct font_desc`. Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/65952296d1d9486093bd955d1536f7dcd11112c6.1605169912.git.yepeilin.cs@gmail.com
2020-11-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextJakub Kicinski1-0/+9
Daniel Borkmann says: ==================== pull-request: bpf-next 2020-11-14 1) Add BTF generation for kernel modules and extend BTF infra in kernel e.g. support for split BTF loading and validation, from Andrii Nakryiko. 2) Support for pointers beyond pkt_end to recognize LLVM generated patterns on inlined branch conditions, from Alexei Starovoitov. 3) Implements bpf_local_storage for task_struct for BPF LSM, from KP Singh. 4) Enable FENTRY/FEXIT/RAW_TP tracing program to use the bpf_sk_storage infra, from Martin KaFai Lau. 5) Add XDP bulk APIs that introduce a defer/flush mechanism to optimize the XDP_REDIRECT path, from Lorenzo Bianconi. 6) Fix a potential (although rather theoretical) deadlock of hashtab in NMI context, from Song Liu. 7) Fixes for cross and out-of-tree build of bpftool and runqslower allowing build for different target archs on same source tree, from Jean-Philippe Brucker. 8) Fix error path in htab_map_alloc() triggered from syzbot, from Eric Dumazet. 9) Move functionality from test_tcpbpf_user into the test_progs framework so it can run in BPF CI, from Alexander Duyck. 10) Lift hashtab key_size limit to be larger than MAX_BPF_STACK, from Florian Lehner. Note that for the fix from Song we have seen a sparse report on context imbalance which requires changes in sparse itself for proper annotation detection where this is currently being discussed on linux-sparse among developers [0]. Once we have more clarification/guidance after their fix, Song will follow-up. [0] https://lore.kernel.org/linux-sparse/CAHk-=wh4bx8A8dHnX612MsDO13st6uzAz1mJ1PaHHVevJx_ZCw@mail.gmail.com/T/ https://lore.kernel.org/linux-sparse/20201109221345.uklbp3lzgq6g42zb@ltop.local/T/ * git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (66 commits) net: mlx5: Add xdp tx return bulking support net: mvpp2: Add xdp tx return bulking support net: mvneta: Add xdp tx return bulking support net: page_pool: Add bulk support for ptr_ring net: xdp: Introduce bulking for xdp tx return path bpf: Expose bpf_d_path helper to sleepable LSM hooks bpf: Augment the set of sleepable LSM hooks bpf: selftest: Use bpf_sk_storage in FENTRY/FEXIT/RAW_TP bpf: Allow using bpf_sk_storage in FENTRY/FEXIT/RAW_TP bpf: Rename some functions in bpf_sk_storage bpf: Folding omem_charge() into sk_storage_charge() selftests/bpf: Add asm tests for pkt vs pkt_end comparison. selftests/bpf: Add skb_pkt_end test bpf: Support for pointers beyond pkt_end. tools/bpf: Always run the *-clean recipes tools/bpf: Add bootstrap/ to .gitignore bpf: Fix NULL dereference in bpf_task_storage tools/bpftool: Fix build slowdown tools/runqslower: Build bpftool using HOSTCC tools/runqslower: Enable out-of-tree build ... ==================== Link: https://lore.kernel.org/r/20201114020819.29584-1-daniel@iogearbox.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-12net: kcov: don't select SKB_EXTENSIONS when there is no NETRandy Dunlap1-1/+1
Fix kconfig warning when CONFIG_NET is not set/enabled: WARNING: unmet direct dependencies detected for SKB_EXTENSIONS Depends on [n]: NET [=n] Selected by [y]: - KCOV [=y] && ARCH_HAS_KCOV [=y] && (CC_HAS_SANCOV_TRACE_PC [=y] || GCC_PLUGINS [=n]) Fixes: 6370cc3bbd8a ("net: add kcov handle to skb extensions") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Aleksandr Nogikh <nogikh@google.com> Cc: Willem de Bruijn <willemb@google.com> Link: https://lore.kernel.org/r/20201110175746.11437-1-rdunlap@infradead.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-10kbuild: Build kernel module BTFs if BTF is enabled and pahole supports itAndrii Nakryiko1-0/+9
Detect if pahole supports split BTF generation, and generate BTF for each selected kernel module, if it does. This is exposed to Makefiles and C code as CONFIG_DEBUG_INFO_BTF_MODULES flag. Kernel module BTF has to be re-generated if either vmlinux's BTF changes or module's .ko changes. To achieve that, I needed a helper similar to if_changed, but that would allow to filter out vmlinux from the list of updated dependencies for .ko building. I've put it next to the only place that uses and needs it, but it might be a better idea to just add it along the other if_changed variants into scripts/Kbuild.include. Each kernel module's BTF deduplication is pretty fast, as it does only incremental BTF deduplication on top of already deduplicated vmlinux BTF. To show the added build time, I've first ran make only just built kernel (to establish the baseline) and then forced only BTF re-generation, without regenerating .ko files. The build was performed with -j60 parallelization on 56-core machine. The final time also includes bzImage building, so it's not a pure BTF overhead. $ time make -j60 ... make -j60 27.65s user 10.96s system 782% cpu 4.933 total $ touch ~/linux-build/default/vmlinux && time make -j60 ... make -j60 123.69s user 27.85s system 1566% cpu 9.675 total So 4.6 seconds real time, with noticeable part spent in compressed vmlinux and bzImage building. To show size savings, I've built my kernel configuration with about 700 kernel modules with full BTF per each kernel module (without deduplicating against vmlinux) and with split BTF against deduplicated vmlinux (approach in this patch). Below are top 10 modules with biggest BTF sizes. And total size of BTF data across all kernel modules. It shows that split BTF "compresses" 115MB down to 5MB total. And the biggest kernel modules get a downsize from 500-570KB down to 200-300KB. FULL BTF ======== $ for f in $(find . -name '*.ko'); do size -A -d $f | grep BTF | awk '{print $2}'; done | awk '{ s += $1 } END { print s }' 115710691 $ for f in $(find . -name '*.ko'); do printf "%s %d\n" $f $(size -A -d $f | grep BTF | awk '{print $2}'); done | sort -nr -k2 | head -n10 ./drivers/gpu/drm/i915/i915.ko 570570 ./drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.ko 520240 ./drivers/gpu/drm/radeon/radeon.ko 503849 ./drivers/infiniband/hw/mlx5/mlx5_ib.ko 491777 ./fs/xfs/xfs.ko 411544 ./drivers/net/ethernet/intel/i40e/i40e.ko 403904 ./drivers/net/ethernet/broadcom/bnx2x/bnx2x.ko 398754 ./drivers/infiniband/core/ib_core.ko 397224 ./fs/cifs/cifs.ko 386249 ./fs/nfsd/nfsd.ko 379738 SPLIT BTF ========= $ for f in $(find . -name '*.ko'); do size -A -d $f | grep BTF | awk '{print $2}'; done | awk '{ s += $1 } END { print s }' 5194047 $ for f in $(find . -name '*.ko'); do printf "%s %d\n" $f $(size -A -d $f | grep BTF | awk '{print $2}'); done | sort -nr -k2 | head -n10 ./drivers/gpu/drm/i915/i915.ko 293206 ./drivers/gpu/drm/radeon/radeon.ko 282103 ./fs/xfs/xfs.ko 222150 ./drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.ko 198503 ./drivers/infiniband/hw/mlx5/mlx5_ib.ko 198356 ./drivers/net/ethernet/broadcom/bnx2x/bnx2x.ko 113444 ./fs/cifs/cifs.ko 109379 ./arch/x86/kvm/kvm.ko 100225 ./drivers/gpu/drm/drm.ko 94827 ./drivers/infiniband/core/ib_core.ko 91188 Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201110011932.3201430-4-andrii@kernel.org
2020-11-10sched,rt: Use cpumask_any*_distribute()Peter Zijlstra1-0/+18
Replace a bunch of cpumask_any*() instances with cpumask_any*_distribute(), by injecting this little bit of random in cpu selection, we reduce the chance two competing balance operations working off the same lowest_mask pick the same CPU. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Valentin Schneider <valentin.schneider@arm.com> Reviewed-by: Daniel Bristot de Oliveira <bristot@redhat.com> Link: https://lkml.kernel.org/r/20201023102347.190759694@infradead.org
2020-11-10sched: Add migrate_disable()Peter Zijlstra1-0/+5
Add the base migrate_disable() support (under protest). While migrate_disable() is (currently) required for PREEMPT_RT, it is also one of the biggest flaws in the system. Notably this is just the base implementation, it is broken vs sched_setaffinity() and hotplug, both solved in additional patches for ease of review. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Valentin Schneider <valentin.schneider@arm.com> Reviewed-by: Daniel Bristot de Oliveira <bristot@redhat.com> Link: https://lkml.kernel.org/r/20201023102346.818170844@infradead.org
2020-11-10stop_machine: Add function and caller debug infoPeter Zijlstra1-0/+2
Crashes in stop-machine are hard to connect to the calling code, add a little something to help with that. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Valentin Schneider <valentin.schneider@arm.com> Reviewed-by: Daniel Bristot de Oliveira <bristot@redhat.com> Link: https://lkml.kernel.org/r/20201023102346.116513635@infradead.org
2020-11-09s390/kasan: remove 3-level paging supportVasily Gorbik1-9/+0
Compiling the kernel with Kasan disables automatic 3-level vs 4-level kernel space paging selection, because the shadow memory offset has to be known at compile time and there is no such offset which would be acceptable for both 3 and 4-level paging. Instead S390_4_LEVEL_PAGING option was introduced which allowed to pick how many paging levels to use under Kasan. With the introduction of protected virtualization, kernel memory layout may be affected due to ultravisor secure storage limit. This adds additional complexity into how memory layout would look like in combination with Kasan predefined shadow memory offsets. To simplify this make Kasan 4-level paging default and remove Kasan 3-level paging support. Suggested-by: Heiko Carstens <hca@linux.ibm.com> Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2020-11-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski17-60/+123
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-06Merge tag 'drm-fixes-2020-11-06-1' of git://anongit.freedesktop.org/drm/drmLinus Torvalds13-13/+13
Pull drm fixes from Dave Airlie: "It's Friday here so that means another installment of drm fixes to distract you from the counting process. Changes all over the place, the amdgpu changes contain support for a new GPU that is close to current one already in the tree (Green Sardine) so it shouldn't have much side effects. Otherwise imx has a few cleanup patches and fixes, amdgpu and i915 have around the usual smattering of fixes, fonts got constified, and vc4/panfrost has some minor fixes. All in all a fairly regular rc3. We have an outstanding nouveau regression, but the author is looking into the fix, so should be here next week. I now return you to counting. fonts: - constify font structures. MAINTAINERS: - Fix path for amdgpu power management amdgpu: - Add support for more navi1x SKUs - Fix for suspend on CI dGPUs - VCN DPG fix for Picasso - Sienna Cichlid fixes - Polaris DPM fix - Add support for Green Sardine amdkfd: - Fix an allocation failure check i915: - Fix set domain's cache coherency - Fixes around breadcrumbs - Fix encoder lookup during PSR atomic - Hold onto an explicit ref to i915_vma_work.pinned - gvt: HWSP reset handling fix - gvt: flush workaround - gvt: vGPU context pin/unpin - gvt: mmio cmd access fix for bxt/apl imx: - drop unused functions and callbacks - reuse imx_drm_encoder_parse_of - spinlock rework - memory leak fix - minor cleanups vc4: - resource cleanup fix panfrost: - madvise/shrinker fix" * tag 'drm-fixes-2020-11-06-1' of git://anongit.freedesktop.org/drm/drm: (55 commits) drm/amdgpu/display: remove DRM_AMD_DC_GREEN_SARDINE drm/amd/display: Add green_sardine support to DM drm/amd/display: Add green_sardine support to DC drm/amdgpu: enable vcn support for green_sardine (v2) drm/amdgpu: enable green_sardine_asd.bin loading (v2) drm/amdgpu/sdma: add sdma engine support for green_sardine (v2) drm/amdgpu: add gfx support for green_sardine (v2) drm/amdgpu: add soc15 common ip block support for green_sardine (v3) drm/amdgpu: add green_sardine support for gpu_info and ip block setting (v2) drm/amdgpu: add Green_Sardine APU flag drm/amdgpu: resolved ASD loading issue on sienna amdkfd: Check kvmalloc return before memcpy drm/amdgpu: update golden setting for sienna_cichlid amd/amdgpu: Disable VCN DPG mode for Picasso drm/amdgpu/swsmu: remove duplicate call to smu_set_default_dpm_table drm/i915: Hold onto an explicit ref to i915_vma_work.pinned drm/i915/gt: Flush xcs before tgl breadcrumbs drm/i915/gt: Expose more parameters for emitting writes into the ring drm/i915: Fix encoder lookup during PSR atomic check drm/i915/gt: Use the local HWSP offset during submission ...
2020-11-03Fonts: Replace discarded const qualifierLee Jones13-13/+13
Commit 6735b4632def ("Fonts: Support FONT_EXTRA_WORDS macros for built-in fonts") introduced the following error when building rpc_defconfig (only this build appears to be affected): `acorndata_8x8' referenced in section `.text' of arch/arm/boot/compressed/ll_char_wr.o: defined in discarded section `.data' of arch/arm/boot/compressed/font.o `acorndata_8x8' referenced in section `.data.rel.ro' of arch/arm/boot/compressed/font.o: defined in discarded section `.data' of arch/arm/boot/compressed/font.o make[3]: *** [/scratch/linux/arch/arm/boot/compressed/Makefile:191: arch/arm/boot/compressed/vmlinux] Error 1 make[2]: *** [/scratch/linux/arch/arm/boot/Makefile:61: arch/arm/boot/compressed/vmlinux] Error 2 make[1]: *** [/scratch/linux/arch/arm/Makefile:317: zImage] Error 2 The .data section is discarded at link time. Reinstating acorndata_8x8 as const ensures it is still available after linking. Do the same for the other 12 built-in fonts as well, for consistency purposes. Cc: <stable@vger.kernel.org> Cc: Russell King <linux@armlinux.org.uk> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Fixes: 6735b4632def ("Fonts: Support FONT_EXTRA_WORDS macros for built-in fonts") Signed-off-by: Lee Jones <lee.jones@linaro.org> Co-developed-by: Peilin Ye <yepeilin.cs@gmail.com> Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20201102183242.2031659-1-yepeilin.cs@gmail.com
2020-11-02net: add kcov handle to skb extensionsAleksandr Nogikh1-0/+1
Remote KCOV coverage collection enables coverage-guided fuzzing of the code that is not reachable during normal system call execution. It is especially helpful for fuzzing networking subsystems, where it is common to perform packet handling in separate work queues even for the packets that originated directly from the user space. Enable coverage-guided frame injection by adding kcov remote handle to skb extensions. Default initialization in __alloc_skb and __build_skb_around ensures that no socket buffer that was generated during a system call will be missed. Code that is of interest and that performs packet processing should be annotated with kcov_remote_start()/kcov_remote_stop(). An alternative approach is to determine kcov_handle solely on the basis of the device/interface that received the specific socket buffer. However, in this case it would be impossible to distinguish between packets that originated during normal background network processes or were intentionally injected from the user space. Signed-off-by: Aleksandr Nogikh <nogikh@google.com> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-02 19:19:43 +0000