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2018-08-27bpf: fix build error with clangStefan Agner1-1/+1
Building the newly introduced BPF_PROG_TYPE_SK_REUSEPORT leads to a compile time error when building with clang: net/core/filter.o: In function `sk_reuseport_convert_ctx_access': ../net/core/filter.c:7284: undefined reference to `__compiletime_assert_7284' It seems that clang has issues resolving hweight_long at compile time. Since SK_FL_PROTO_MASK is a constant, we can use the interface for known constant arguments which works fine with clang. Fixes: 2dbb9b9e6df6 ("bpf: Introduce BPF_PROG_TYPE_SK_REUSEPORT") Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-08-27net/rds: Use rdma_read_gids to get connection SGID/DGID in IPv6Zhu Yanjun1-7/+2
In IPv4, the newly introduced rdma_read_gids is used to read the SGID/DGID for the connection which returns GID correctly for RoCE transport as well. In IPv6, rdma_read_gids is also used. The following are why rdma_read_gids is introduced. rdma_addr_get_dgid() for RoCE for client side connections returns MAC address, instead of DGID. rdma_addr_get_sgid() for RoCE doesn't return correct SGID for IPv6 and when more than one IP address is assigned to the netdevice. So the transport agnostic rdma_read_gids() API is provided by rdma_cm module. Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-27net: dsa: Drop GPIO includesLinus Walleij1-2/+0
Commit 52638f71fcff ("dsa: Move gpio reset into switch driver") moved the GPIO handling into the switch drivers but forgot to remove the GPIO header includes. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-27tipc: fix the big/little endian issue in tipc_destHaiqing Bai2-13/+6
In function tipc_dest_push, the 32bit variables 'node' and 'port' are stored separately in uppper and lower part of 64bit 'value'. Then this value is assigned to dst->value which is a union like: union { struct { u32 port; u32 node; }; u64 value; } This works on little-endian machines like x86 but fails on big-endian machines. The fix remove the 'value' stack parameter and even the 'value' member of the union in tipc_dest, assign the 'node' and 'port' member directly with the input parameter to avoid the endian issue. Fixes: a80ae5306a73 ("tipc: improve destination linked list") Signed-off-by: Zhenbo Gao <zhenbo.gao@windriver.com> Acked-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: Haiqing Bai <Haiqing.Bai@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-27net: sched: return -ENOENT when trying to remove filter from non-existent chainJiri Pirko1-1/+1
When chain 0 was implicitly created, removal of non-existent filter from chain 0 gave -ENOENT. Once chain 0 became non-implicit, the same call is giving -EINVAL. Fix this by returning -ENOENT in that case. Reported-by: Roman Mashak <mrv@mojatatu.com> Fixes: f71e0ca4db18 ("net: sched: Avoid implicit chain 0 creation") Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-27net: sched: fix extack error message when chain is failed to be createdJiri Pirko1-1/+1
Instead "Cannot find" say "Cannot create". Fixes: c35a4acc2985 ("net: sched: cls_api: handle generic cls errors") Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-27erspan: set erspan_ver to 1 by default when adding an erspan devXin Long2-0/+4
After erspan_ver is introudced, if erspan_ver is not set in iproute, its value will be left 0 by default. Since Commit 02f99df1875c ("erspan: fix invalid erspan version."), it has broken the traffic due to the version check in erspan_xmit if users are not aware of 'erspan_ver' param, like using an old version of iproute. To fix this compatibility problem, it sets erspan_ver to 1 by default when adding an erspan dev in erspan_setup. Note that we can't do it in ipgre_netlink_parms, as this function is also used by ipgre_changelink. Fixes: 02f99df1875c ("erspan: fix invalid erspan version.") Reported-by: Jianlin Shi <jishi@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-27sctp: remove useless start_fail from sctp_ht_iter in procXin Long1-4/+0
After changing rhashtable_walk_start to return void, start_fail would never be set other value than 0, and the checking for start_fail is pointless, so remove it. Fixes: 97a6ec4ac021 ("rhashtable: Change rhashtable_walk_start to return void") Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-27sctp: hold transport before accessing its asoc in sctp_transport_get_nextXin Long2-11/+15
As Marcelo noticed, in sctp_transport_get_next, it is iterating over transports but then also accessing the association directly, without checking any refcnts before that, which can cause an use-after-free Read. So fix it by holding transport before accessing the association. With that, sctp_transport_hold calls can be removed in the later places. Fixes: 626d16f50f39 ("sctp: export some apis or variables for sctp_diag and reuse some for proc") Reported-by: syzbot+fe62a0c9aa6a85c6de16@syzkaller.appspotmail.com Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-27Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds30-265/+142
Pull networking fixes from David Miller: 1) ICE, E1000, IGB, IXGBE, and I40E bug fixes from the Intel folks. 2) Better fix for AB-BA deadlock in packet scheduler code, from Cong Wang. 3) bpf sockmap fixes (zero sized key handling, etc.) from Daniel Borkmann. 4) Send zero IPID in TCP resets and SYN-RECV state ACKs, to prevent attackers using it as a side-channel. From Eric Dumazet. 5) Memory leak in mediatek bluetooth driver, from Gustavo A. R. Silva. 6) Hook up rt->dst.input of ipv6 anycast routes properly, from Hangbin Liu. 7) hns and hns3 bug fixes from Huazhong Tan. 8) Fix RIF leak in mlxsw driver, from Ido Schimmel. 9) iova range check fix in vhost, from Jason Wang. 10) Fix hang in do_tcp_sendpages() with tls, from John Fastabend. 11) More r8152 chips need to disable RX aggregation, from Kai-Heng Feng. 12) Memory exposure in TCA_U32_SEL handling, from Kees Cook. 13) TCP BBR congestion control fixes from Kevin Yang. 14) hv_netvsc, ignore non-PCI devices, from Stephen Hemminger. 15) qed driver fixes from Tomer Tayar. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (77 commits) net: sched: Fix memory exposure from short TCA_U32_SEL qed: fix spelling mistake "comparsion" -> "comparison" vhost: correctly check the iova range when waking virtqueue qlge: Fix netdev features configuration. net: macb: do not disable MDIO bus at open/close time Revert "net: stmmac: fix build failure due to missing COMMON_CLK dependency" net: macb: Fix regression breaking non-MDIO fixed-link PHYs mlxsw: spectrum_switchdev: Do not leak RIFs when removing bridge i40e: fix condition of WARN_ONCE for stat strings i40e: Fix for Tx timeouts when interface is brought up if DCB is enabled ixgbe: fix driver behaviour after issuing VFLR ixgbe: Prevent unsupported configurations with XDP ixgbe: Replace GFP_ATOMIC with GFP_KERNEL igb: Replace mdelay() with msleep() in igb_integrated_phy_loopback() igb: Replace GFP_ATOMIC with GFP_KERNEL in igb_sw_init() igb: Use an advanced ctx descriptor for launchtime e1000: ensure to free old tx/rx rings in set_ringparam() e1000: check on netif_running() before calling e1000_up() ixgb: use dma_zalloc_coherent instead of allocator/memset ice: Trivial formatting fixes ...
2018-08-26net: sched: Fix memory exposure from short TCA_U32_SELKees Cook1-2/+8
Via u32_change(), TCA_U32_SEL has an unspecified type in the netlink policy, so max length isn't enforced, only minimum. This means nkeys (from userspace) was being trusted without checking the actual size of nla_len(), which could lead to a memory over-read, and ultimately an exposure via a call to u32_dump(). Reachability is CAP_NET_ADMIN within a namespace. Reported-by: Al Viro <viro@zeniv.linux.org.uk> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Cong Wang <xiyou.wangcong@gmail.com> Cc: Jiri Pirko <jiri@resnulli.us> Cc: "David S. Miller" <davem@davemloft.net> Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-26Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-daxLinus Torvalds1-10/+6
Pull IDA updates from Matthew Wilcox: "A better IDA API: id = ida_alloc(ida, GFP_xxx); ida_free(ida, id); rather than the cumbersome ida_simple_get(), ida_simple_remove(). The new IDA API is similar to ida_simple_get() but better named. The internal restructuring of the IDA code removes the bitmap preallocation nonsense. I hope the net -200 lines of code is convincing" * 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax: (29 commits) ida: Change ida_get_new_above to return the id ida: Remove old API test_ida: check_ida_destroy and check_ida_alloc test_ida: Convert check_ida_conv to new API test_ida: Move ida_check_max test_ida: Move ida_check_leaf idr-test: Convert ida_check_nomem to new API ida: Start new test_ida module target/iscsi: Allocate session IDs from an IDA iscsi target: fix session creation failure handling drm/vmwgfx: Convert to new IDA API dmaengine: Convert to new IDA API ppc: Convert vas ID allocation to new IDA API media: Convert entity ID allocation to new IDA API ppc: Convert mmu context allocation to new IDA API Convert net_namespace to new IDA API cb710: Convert to new IDA API rsxx: Convert to new IDA API osd: Convert to new IDA API sd: Convert to new IDA API ...
2018-08-23Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfDavid S. Miller2-4/+9
Daniel Borkmann says: ==================== pull-request: bpf 2018-08-24 The following pull-request contains BPF updates for your *net* tree. The main changes are: 1) Fix BPF sockmap and tls where we get a hang in do_tcp_sendpages() when sndbuf is full due to missing calls into underlying socket's sk_write_space(), from John. 2) Two BPF sockmap fixes to reject invalid parameters on map creation and to fix a map element miscount on allocation failure. Another fix for BPF hash tables to use per hash table salt for jhash(), from Daniel. 3) Fix for bpftool's command line parsing in order to terminate on bad arguments instead of keeping looping in some border cases, from Quentin. 4) Fix error value of xdp_umem_assign_dev() in order to comply with expected bind ops error codes, from Prashant. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-23Merge branch 'akpm' (patches from Andrew)Linus Torvalds2-6/+6
Merge yet more updates from Andrew Morton: - the rest of MM - various misc fixes and tweaks * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (22 commits) mm: Change return type int to vm_fault_t for fault handlers lib/fonts: convert comments to utf-8 s390: ebcdic: convert comments to UTF-8 treewide: convert ISO_8859-1 text comments to utf-8 drivers/gpu/drm/gma500/: change return type to vm_fault_t docs/core-api: mm-api: add section about GFP flags docs/mm: make GFP flags descriptions usable as kernel-doc docs/core-api: split memory management API to a separate file docs/core-api: move *{str,mem}dup* to "String Manipulation" docs/core-api: kill trailing whitespace in kernel-api.rst mm/util: add kernel-doc for kvfree mm/util: make strndup_user description a kernel-doc comment fs/proc/vmcore.c: hide vmcoredd_mmap_dumps() for nommu builds treewide: correct "differenciate" and "instanciate" typos fs/afs: use new return type vm_fault_t drivers/hwtracing/intel_th/msu.c: change return type to vm_fault_t mm: soft-offline: close the race against page allocation mm: fix race on soft-offlining free huge pages namei: allow restricted O_CREAT of FIFOs and regular files hfs: prevent crash on exit from failed search ...
2018-08-23treewide: convert ISO_8859-1 text comments to utf-8Arnd Bergmann2-6/+6
Almost all files in the kernel are either plain text or UTF-8 encoded. A couple however are ISO_8859-1, usually just a few characters in a C comments, for historic reasons. This converts them all to UTF-8 for consistency. Link: http://lkml.kernel.org/r/20180724111600.4158975-1-arnd@arndb.de Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Simon Horman <horms@verge.net.au> [IPVS portion] Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> [IIO] Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Acked-by: Rob Herring <robh@kernel.org> Cc: Joe Perches <joe@perches.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Samuel Ortiz <sameo@linux.intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Rob Herring <robh+dt@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-08-23Merge tag 'nfs-for-4.19-1' of git://git.linux-nfs.org/projects/anna/linux-nfsLinus Torvalds19-49/+75
Pull NFS client updates from Anna Schumaker: "These patches include adding async support for the v4.2 COPY operation. I think Bruce is planning to send the server patches for the next release, but I figured we could get the client side out of the way now since it's been in my tree for a while. This shouldn't cause any problems, since the server will still respond with synchronous copies even if the client requests async. Features: - Add support for asynchronous server-side COPY operations Stable bufixes: - Fix an off-by-one in bl_map_stripe() (v3.17+) - NFSv4 client live hangs after live data migration recovery (v4.9+) - xprtrdma: Fix disconnect regression (v4.18+) - Fix locking in pnfs_generic_recover_commit_reqs (v4.14+) - Fix a sleep in atomic context in nfs4_callback_sequence() (v4.9+) Other bugfixes and cleanups: - Optimizations and fixes involving NFS v4.1 / pNFS layout handling - Optimize lseek(fd, SEEK_CUR, 0) on directories to avoid locking - Immediately reschedule writeback when the server replies with an error - Fix excessive attribute revalidation in nfs_execute_ok() - Add error checking to nfs_idmap_prepare_message() - Use new vm_fault_t return type - Return a delegation when reclaiming one that the server has recalled - Referrals should inherit proto setting from parents - Make rpc_auth_create_args a const - Improvements to rpc_iostats tracking - Fix a potential reference leak when there is an error processing a callback - Fix rmdir / mkdir / rename nlink accounting - Fix updating inode change attribute - Fix error handling in nfsn4_sp4_select_mode() - Use an appropriate work queue for direct-write completion - Don't busy wait if NFSv4 session draining is interrupted" * tag 'nfs-for-4.19-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (54 commits) pNFS: Remove unwanted optimisation of layoutget pNFS/flexfiles: ff_layout_pg_init_read should exit on error pNFS: Treat RECALLCONFLICT like DELAY... pNFS: When updating the stateid in layoutreturn, also update the recall range NFSv4: Fix a sleep in atomic context in nfs4_callback_sequence() NFSv4: Fix locking in pnfs_generic_recover_commit_reqs NFSv4: Fix a typo in nfs4_init_channel_attrs() NFSv4: Don't busy wait if NFSv4 session draining is interrupted NFS recover from destination server reboot for copies NFS add a simple sync nfs4_proc_commit after async COPY NFS handle COPY ERR_OFFLOAD_NO_REQS NFS send OFFLOAD_CANCEL when COPY killed NFS export nfs4_async_handle_error NFS handle COPY reply CB_OFFLOAD call race NFS add support for asynchronous COPY NFS COPY xdr handle async reply NFS OFFLOAD_CANCEL xdr NFS CB_OFFLOAD xdr NFS: Use an appropriate work queue for direct-write completion NFSv4: Fix error handling in nfs4_sp4_select_mode() ...
2018-08-23Merge tag 'nfsd-4.19-1' of git://linux-nfs.org/~bfields/linuxLinus Torvalds10-111/+140
Pull nfsd updates from Bruce Fields: "Chuck Lever fixed a problem with NFSv4.0 callbacks over GSS from multi-homed servers. The only new feature is a minor bit of protocol (change_attr_type) which the client doesn't even use yet. Other than that, various bugfixes and cleanup" * tag 'nfsd-4.19-1' of git://linux-nfs.org/~bfields/linux: (27 commits) sunrpc: Add comment defining gssd upcall API keywords nfsd: Remove callback_cred nfsd: Use correct credential for NFSv4.0 callback with GSS sunrpc: Extract target name into svc_cred sunrpc: Enable the kernel to specify the hostname part of service principals sunrpc: Don't use stack buffer with scatterlist rpc: remove unneeded variable 'ret' in rdma_listen_handler nfsd: use true and false for boolean values nfsd: constify write_op[] fs/nfsd: Delete invalid assignment statements in nfsd4_decode_exchange_id NFSD: Handle full-length symlinks NFSD: Refactor the generic write vector fill helper svcrdma: Clean up Read chunk path svcrdma: Avoid releasing a page in svc_xprt_release() nfsd: Mark expected switch fall-through sunrpc: remove redundant variables 'checksumlen','blocksize' and 'data' nfsd: fix leaked file lock with nfs exported overlayfs nfsd: don't advertise a SCSI layout for an unsupported request_queue nfsd: fix corrupted reply to badly ordered compound nfsd: clarify check_op_ordering ...
2018-08-23Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdmaLinus Torvalds1-23/+25
Pull more rdma updates from Jason Gunthorpe: "This is the SMC cleanup promised, a randconfig regression fix, and kernel oops fix. Summary: - Switch SMC over to rdma_get_gid_attr and remove the compat - Fix a crash in HFI1 with some BIOS's - Fix a randconfig failure" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: IB/ucm: fix UCM link error IB/hfi1: Invalid NUMA node information can cause a divide by zero RDMA/smc: Replace ib_query_gid with rdma_get_gid_attr
2018-08-22net/ipv6: init ip6 anycast rt->dst.input as ip6_inputHangbin Liu1-1/+1
Commit 6edb3c96a5f02 ("net/ipv6: Defer initialization of dst to data path") forgot to handle anycast route and init anycast rt->dst.input to ip6_forward. Fix it by setting anycast rt->dst.input back to ip6_input. Fixes: 6edb3c96a5f02 ("net/ipv6: Defer initialization of dst to data path") Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-22tcp_bbr: apply PROBE_RTT cwnd cap even if acked==0Kevin Yang1-2/+2
This commit fixes a corner case where TCP BBR would enter PROBE_RTT mode but not reduce its cwnd. If a TCP receiver ACKed less than one full segment, the number of delivered/acked packets was 0, so that bbr_set_cwnd() would short-circuit and exit early, without cutting cwnd to the value we want for PROBE_RTT. The fix is to instead make sure that even when 0 full packets are ACKed, we do apply all the appropriate caps, including the cap that applies in PROBE_RTT mode. Fixes: 0f8782ea1497 ("tcp_bbr: add BBR congestion control") Signed-off-by: Kevin Yang <yyd@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Reviewed-by: Yuchung Cheng <ycheng@google.com> Reviewed-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-22tcp_bbr: in restart from idle, see if we should exit PROBE_RTTKevin Yang1-0/+4
This patch fix the case where BBR does not exit PROBE_RTT mode when it restarts from idle. When BBR restarts from idle and if BBR is in PROBE_RTT mode, BBR should check if it's time to exit PROBE_RTT. If yes, then BBR should exit PROBE_RTT mode and restore the cwnd to its full value. Fixes: 0f8782ea1497 ("tcp_bbr: add BBR congestion control") Signed-off-by: Kevin Yang <yyd@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Reviewed-by: Yuchung Cheng <ycheng@google.com> Reviewed-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-22tcp_bbr: add bbr_check_probe_rtt_done() helperKevin Yang1-16/+18
This patch add a helper function bbr_check_probe_rtt_done() to 1. check the condition to see if bbr should exit probe_rtt mode; 2. process the logic of exiting probe_rtt mode. Fixes: 0f8782ea1497 ("tcp_bbr: add BBR congestion control") Signed-off-by: Kevin Yang <yyd@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Reviewed-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-22ipv4: tcp: send zero IPID for RST and ACK sent in SYN-RECV and TIME-WAIT stateEric Dumazet1-0/+6
tcp uses per-cpu (and per namespace) sockets (net->ipv4.tcp_sk) internally to send some control packets. 1) RST packets, through tcp_v4_send_reset() 2) ACK packets in SYN-RECV and TIME-WAIT state, through tcp_v4_send_ack() These packets assert IP_DF, and also use the hashed IP ident generator to provide an IPv4 ID number. Geoff Alexander reported this could be used to build off-path attacks. These packets should not be fragmented, since their size is smaller than IPV4_MIN_MTU. Only some tunneled paths could eventually have to fragment, regardless of inner IPID. We really can use zero IPID, to address the flaw, and as a bonus, avoid a couple of atomic operations in ip_idents_reserve() Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Geoff Alexander <alexandg@cs.unm.edu> Tested-by: Geoff Alexander <alexandg@cs.unm.edu> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-22addrconf: reduce unnecessary atomic allocationsCong Wang1-3/+3
All the 3 callers of addrconf_add_mroute() assert RTNL lock, they don't take any additional lock either, so it is safe to convert it to GFP_KERNEL. Same for sit_add_v4_addrs(). Cc: David Ahern <dsahern@gmail.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-22sch_cake: Fix TC filter flow override and expand it to hosts as wellToke Høiland-Jørgensen1-4/+19
The TC filter flow mapping override completely skipped the call to cake_hash(); however that meant that the internal state was not being updated, which ultimately leads to deadlocks in some configurations. Fix that by passing the overridden flow ID into cake_hash() instead so it can react appropriately. In addition, the major number of the class ID can now be set to override the host mapping in host isolation mode. If both host and flow are overridden (or if the respective modes are disabled), flow dissection and hashing will be skipped entirely; otherwise, the hashing will be kept for the portions that are not set by the filter. Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-22net/ncsi: Fixup .dumpit message flags and ID check in Netlink handlerSamuel Mendoza-Jonas1-2/+2
The ncsi_pkg_info_all_nl() .dumpit handler is missing the NLM_F_MULTI flag, causing additional package information after the first to be lost. Also fixup a sanity check in ncsi_write_package_info() to reject out of range package IDs. Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-22sunrpc: Add comment defining gssd upcall API keywordsChuck Lever1-0/+17
During review, it was found that the target, service, and srchost keywords are easily conflated. Add an explainer. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2018-08-22sunrpc: Extract target name into svc_credChuck Lever1-25/+45
NFSv4.0 callback needs to know the GSS target name the client used when it established its lease. That information is available from the GSS context created by gssproxy. Make it available in each svc_cred. Note this will also give us access to the real target service principal name (which is typically "nfs", but spec does not require that). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2018-08-22sunrpc: Enable the kernel to specify the hostname part of service principalsChuck Lever1-3/+17
A multi-homed NFS server may have more than one "nfs" key in its keytab. Enable the kernel to pick the key it wants as a machine credential when establishing a GSS context. This is useful for GSS-protected NFSv4.0 callbacks, which are required by RFC 7530 S3.3.3 to use the same principal as the service principal the client used when establishing its lease. A complementary modification to rpc.gssd is required to fully enable this feature. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2018-08-22sunrpc: Don't use stack buffer with scatterlistLaura Abbott1-3/+9
Fedora got a bug report from NFS: kernel BUG at include/linux/scatterlist.h:143! ... RIP: 0010:sg_init_one+0x7d/0x90 .. make_checksum+0x4e7/0x760 [rpcsec_gss_krb5] gss_get_mic_kerberos+0x26e/0x310 [rpcsec_gss_krb5] gss_marshal+0x126/0x1a0 [auth_rpcgss] ? __local_bh_enable_ip+0x80/0xe0 ? call_transmit_status+0x1d0/0x1d0 [sunrpc] call_transmit+0x137/0x230 [sunrpc] __rpc_execute+0x9b/0x490 [sunrpc] rpc_run_task+0x119/0x150 [sunrpc] nfs4_run_exchange_id+0x1bd/0x250 [nfsv4] _nfs4_proc_exchange_id+0x2d/0x490 [nfsv4] nfs41_discover_server_trunking+0x1c/0xa0 [nfsv4] nfs4_discover_server_trunking+0x80/0x270 [nfsv4] nfs4_init_client+0x16e/0x240 [nfsv4] ? nfs_get_client+0x4c9/0x5d0 [nfs] ? _raw_spin_unlock+0x24/0x30 ? nfs_get_client+0x4c9/0x5d0 [nfs] nfs4_set_client+0xb2/0x100 [nfsv4] nfs4_create_server+0xff/0x290 [nfsv4] nfs4_remote_mount+0x28/0x50 [nfsv4] mount_fs+0x3b/0x16a vfs_kern_mount.part.35+0x54/0x160 nfs_do_root_mount+0x7f/0xc0 [nfsv4] nfs4_try_mount+0x43/0x70 [nfsv4] ? get_nfs_version+0x21/0x80 [nfs] nfs_fs_mount+0x789/0xbf0 [nfs] ? pcpu_alloc+0x6ca/0x7e0 ? nfs_clone_super+0x70/0x70 [nfs] ? nfs_parse_mount_options+0xb40/0xb40 [nfs] mount_fs+0x3b/0x16a vfs_kern_mount.part.35+0x54/0x160 do_mount+0x1fd/0xd50 ksys_mount+0xba/0xd0 __x64_sys_mount+0x21/0x30 do_syscall_64+0x60/0x1f0 entry_SYSCALL_64_after_hwframe+0x49/0xbe This is BUG_ON(!virt_addr_valid(buf)) triggered by using a stack allocated buffer with a scatterlist. Convert the buffer for rc4salt to be dynamically allocated instead. Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1615258 Signed-off-by: Laura Abbott <labbott@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2018-08-22tls: possible hang when do_tcp_sendpages hits sndbuf is full caseJohn Fastabend1-2/+7
Currently, the lower protocols sk_write_space handler is not called if TLS is sending a scatterlist via tls_push_sg. However, normally tls_push_sg calls do_tcp_sendpage, which may be under memory pressure, that in turn may trigger a wait via sk_wait_event. Typically, this happens when the in-flight bytes exceed the sdnbuf size. In the normal case when enough ACKs are received sk_write_space() will be called and the sk_wait_event will be woken up allowing it to send more data and/or return to the user. But, in the TLS case because the sk_write_space() handler does not wake up the events the above send will wait until the sndtimeo is exceeded. By default this is MAX_SCHEDULE_TIMEOUT so it look like a hang to the user (especially this impatient user). To fix this pass the sk_write_space event to the lower layers sk_write_space event which in the TCP case will wake any pending events. I observed the above while integrating sockmap and ktls. It initially appeared as test_sockmap (modified to use ktls) occasionally hanging. To reliably reproduce this reduce the sndbuf size and stress the tls layer by sending many 1B sends. This results in every byte needing a header and each byte individually being sent to the crypto layer. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Dave Watson <davejwatson@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-08-21Convert net_namespace to new IDA APIMatthew Wilcox1-10/+6
Signed-off-by: Matthew Wilcox <willy@infradead.org>
2018-08-21xsk: fix return value of xdp_umem_assign_dev()Prashant Bhole1-2/+2
s/ENOTSUPP/EOPNOTSUPP/ in function umem_assign_dev(). This function's return value is directly returned by xsk_bind(). EOPNOTSUPP is bind()'s possible return value. Fixes: f734607e819b ("xsk: refactor xdp_umem_assign_dev()") Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp> Acked-by: Song Liu <songliubraving@fb.com> Acked-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-08-21act_ife: fix a potential deadlockCong Wang1-13/+21
use_all_metadata() acquires read_lock(&ife_mod_lock), then calls add_metainfo() which calls find_ife_oplist() which acquires the same lock again. Deadlock! Introduce __add_metainfo() which accepts struct tcf_meta_ops *ops as an additional parameter and let its callers to decide how to find it. For use_all_metadata(), it already has ops, no need to find it again, just call __add_metainfo() directly. And, as ife_mod_lock is only needed for find_ife_oplist(), this means we can make non-atomic allocation for populate_metalist() now. Fixes: 817e9f2c5c26 ("act_ife: acquire ife_mod_lock before reading ifeoplist") Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-21act_ife: move tcfa_lock down to where necessaryCong Wang1-25/+13
The only time we need to take tcfa_lock is when adding a new metainfo to an existing ife->metalist. We don't need to take tcfa_lock so early and so broadly in tcf_ife_init(). This means we can always take ife_mod_lock first, avoid the reverse locking ordering warning as reported by Vlad. Reported-by: Vlad Buslov <vladbu@mellanox.com> Tested-by: Vlad Buslov <vladbu@mellanox.com> Cc: Vlad Buslov <vladbu@mellanox.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-21Revert "net: sched: act_ife: disable bh when taking ife_mod_lock"Cong Wang1-10/+10
This reverts commit 42c625a486f3 ("net: sched: act_ife: disable bh when taking ife_mod_lock"), because what ife_mod_lock protects is absolutely not touched in rate est timer BH context, they have no race. A better fix is following up. Cc: Vlad Buslov <vladbu@mellanox.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-21net_sched: remove list_head from tc_actionCong Wang2-4/+1
After commit 90b73b77d08e, list_head is no longer needed. Now we just need to convert the list iteration to array iteration for drivers. Fixes: 90b73b77d08e ("net: sched: change action API to use array of pointers to actions") Cc: Jiri Pirko <jiri@mellanox.com> Cc: Vlad Buslov <vladbu@mellanox.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-21net_sched: remove unused tcf_idr_check()Cong Wang1-19/+3
tcf_idr_check() is replaced by tcf_idr_check_alloc(), and __tcf_idr_check() now can be folded into tcf_idr_search(). Fixes: 0190c1d452a9 ("net: sched: atomically check-allocate action") Cc: Jiri Pirko <jiri@mellanox.com> Cc: Vlad Buslov <vladbu@mellanox.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-21net_sched: remove unused parameter for tcf_action_delete()Cong Wang1-3/+2
Fixes: 16af6067392c ("net: sched: implement reference counted action release") Cc: Jiri Pirko <jiri@mellanox.com> Cc: Vlad Buslov <vladbu@mellanox.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-21net_sched: remove unnecessary ops->delete()Cong Wang17-144/+7
All ops->delete() wants is getting the tn->idrinfo, but we already have tc_action before calling ops->delete(), and tc_action has a pointer ->idrinfo. More importantly, each type of action does the same thing, that is, just calling tcf_idr_delete_index(). So it can be just removed. Fixes: b409074e6693 ("net: sched: add 'delete' function to action ops") Cc: Jiri Pirko <jiri@mellanox.com> Cc: Vlad Buslov <vladbu@mellanox.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-21net_sched: improve and refactor tcf_action_put_many()Cong Wang1-16/+15
tcf_action_put_many() is mostly called to clean up actions on failure path, but tcf_action_put_many(&actions[acts_deleted]) is used in the ugliest way: it passes a slice of the array and uses an additional NULL at the end to avoid out-of-bound access. acts_deleted is completely unnecessary since we can teach tcf_action_put_many() scan the whole array and checks against NULL pointer. Which also means tcf_action_delete() should set deleted action pointers to NULL to avoid double free. Fixes: 90b73b77d08e ("net: sched: change action API to use array of pointers to actions") Cc: Jiri Pirko <jiri@mellanox.com> Cc: Vlad Buslov <vladbu@mellanox.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-21rds: tcp: remove duplicated include from tcp.cYue Haibing1-1/+0
Remove duplicated include. Signed-off-by: Yue Haibing <yuehaibing@huawei.com> Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-21sch_cake: Remove unused including <linux/version.h>Yue Haibing1-1/+0
Remove including <linux/version.h> that don't need it. Signed-off-by: Yue Haibing <yuehaibing@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-20Merge tag 'ceph-for-4.19-rc1' of git://github.com/ceph/ceph-clientLinus Torvalds15-122/+311
Pull ceph updates from Ilya Dryomov: "The main things are support for cephx v2 authentication protocol and basic support for rbd images within namespaces (myself). Also included are y2038 conversion patches from Arnd, a pile of miscellaneous fixes from Chengguang and Zheng's feature bit infrastructure for the filesystem" * tag 'ceph-for-4.19-rc1' of git://github.com/ceph/ceph-client: (40 commits) ceph: don't drop message if it contains more data than expected ceph: support cephfs' own feature bits crush: fix using plain integer as NULL warning libceph: remove unnecessary non NULL check for request_key ceph: refactor error handling code in ceph_reserve_caps() ceph: refactor ceph_unreserve_caps() ceph: change to void return type for __do_request() ceph: compare fsc->max_file_size and inode->i_size for max file size limit ceph: add additional size check in ceph_setattr() ceph: add additional offset check in ceph_write_iter() ceph: add additional range check in ceph_fallocate() ceph: add new field max_file_size in ceph_fs_client libceph: weaken sizeof check in ceph_x_verify_authorizer_reply() libceph: check authorizer reply/challenge length before reading libceph: implement CEPHX_V2 calculation mode libceph: add authorizer challenge libceph: factor out encrypt_authorizer() libceph: factor out __ceph_x_decrypt() libceph: factor out __prepare_write_connect() libceph: store ceph_auth_handshake pointer in ceph_connection ...
2018-08-20net/ipv6: Put lwtstate when destroying fib6_infoDavid Ahern1-0/+2
Prior to the introduction of fib6_info lwtstate was managed by the dst code. With fib6_info releasing lwtstate needs to be done when the struct is freed. Fixes: 93531c674315 ("net/ipv6: separate handling of FIB entries from dst based routes") Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-19ip6_vti: fix a null pointer deference when destroy vti6 tunnelHaishuang Yan1-1/+2
If load ip6_vti module and create a network namespace when set fb_tunnels_only_for_init_net to 1, then exit the namespace will cause following crash: [ 6601.677036] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 [ 6601.679057] PGD 8000000425eca067 P4D 8000000425eca067 PUD 424292067 PMD 0 [ 6601.680483] Oops: 0000 [#1] SMP PTI [ 6601.681223] CPU: 7 PID: 93 Comm: kworker/u16:1 Kdump: loaded Tainted: G E 4.18.0+ #3 [ 6601.683153] Hardware name: Fedora Project OpenStack Nova, BIOS seabios-1.7.5-11.el7 04/01/2014 [ 6601.684919] Workqueue: netns cleanup_net [ 6601.685742] RIP: 0010:vti6_exit_batch_net+0x87/0xd0 [ip6_vti] [ 6601.686932] Code: 7b 08 48 89 e6 e8 b9 ea d3 dd 48 8b 1b 48 85 db 75 ec 48 83 c5 08 48 81 fd 00 01 00 00 75 d5 49 8b 84 24 08 01 00 00 48 89 e6 <48> 8b 78 08 e8 90 ea d3 dd 49 8b 45 28 49 39 c6 4c 8d 68 d8 75 a1 [ 6601.690735] RSP: 0018:ffffa897c2737de0 EFLAGS: 00010246 [ 6601.691846] RAX: 0000000000000000 RBX: 0000000000000000 RCX: dead000000000200 [ 6601.693324] RDX: 0000000000000015 RSI: ffffa897c2737de0 RDI: ffffffff9f2ea9e0 [ 6601.694824] RBP: 0000000000000100 R08: 0000000000000000 R09: 0000000000000000 [ 6601.696314] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8dc323c07e00 [ 6601.697812] R13: ffff8dc324a63100 R14: ffffa897c2737e30 R15: ffffa897c2737e30 [ 6601.699345] FS: 0000000000000000(0000) GS:ffff8dc33fdc0000(0000) knlGS:0000000000000000 [ 6601.701068] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 6601.702282] CR2: 0000000000000008 CR3: 0000000424966002 CR4: 00000000001606e0 [ 6601.703791] Call Trace: [ 6601.704329] cleanup_net+0x1b4/0x2c0 [ 6601.705268] process_one_work+0x16c/0x370 [ 6601.706145] worker_thread+0x49/0x3e0 [ 6601.706942] kthread+0xf8/0x130 [ 6601.707626] ? rescuer_thread+0x340/0x340 [ 6601.708476] ? kthread_bind+0x10/0x10 [ 6601.709266] ret_from_fork+0x35/0x40 Reproduce: modprobe ip6_vti echo 1 > /proc/sys/net/core/fb_tunnels_only_for_init_net unshare -n exit This because ip6n->tnls_wc[0] point to fallback device in default, but in non-default namespace, ip6n->tnls_wc[0] will be NULL, so add the NULL check comparatively. Fixes: e2948e5af8ee ("ip6_vti: fix creating fallback tunnel device for vti6") Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds30-195/+221
Pull networking fixes from David Miller: 1) Fix races in IPVS, from Tan Hu. 2) Missing unbind in matchall classifier, from Hangbin Liu. 3) Missing act_ife action release, from Vlad Buslov. 4) Cure lockdep splats in ila, from Cong Wang. 5) veth queue leak on link delete, from Toshiaki Makita. 6) Disable isdn's IIOCDBGVAR ioctl, it exposes kernel addresses. From Kees Cook. 7) RCU usage fixup in XDP, from Tariq Toukan. 8) Two TCP ULP fixes from Daniel Borkmann. 9) r8169 needs REALTEK_PHY as a Kconfig dependency, from Heiner Kallweit. 10) Always take tcf_lock with BH disabled, otherwise we can deadlock with rate estimator code paths. From Vlad Buslov. 11) Don't use MSI-X on RTL8106e r8169 chips, they don't resume properly. From Jian-Hong Pan. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (41 commits) ip6_vti: fix creating fallback tunnel device for vti6 ip_vti: fix a null pointer deferrence when create vti fallback tunnel r8169: don't use MSI-X on RTL8106e net: lan743x_ptp: convert to ktime_get_clocktai_ts64 net: sched: always disable bh when taking tcf_lock ip6_vti: simplify stats handling in vti6_xmit bpf: fix redirect to map under tail calls r8169: add missing Kconfig dependency tools/bpf: fix bpf selftest test_cgroup_storage failure bpf, sockmap: fix sock_map_ctx_update_elem race with exist/noexist bpf, sockmap: fix map elem deletion race with smap_stop_sock bpf, sockmap: fix leakage of smap_psock_map_entry tcp, ulp: fix leftover icsk_ulp_ops preventing sock from reattach tcp, ulp: add alias for all ulp modules bpf: fix a rcu usage warning in bpf_prog_array_copy_core() samples/bpf: all XDP samples should unload xdp/bpf prog on SIGTERM net/xdp: Fix suspicious RCU usage warning net/mlx5e: Delete unneeded function argument Documentation: networking: ti-cpsw: correct cbs parameters for Eth1 100Mb isdn: Disable IIOCDBGVAR ...
2018-08-19ip6_vti: fix creating fallback tunnel device for vti6Haishuang Yan1-0/+2
When set fb_tunnels_only_for_init_net to 1, don't create fallback tunnel device for vti6 when a new namespace is created. Tested: [root@builder2 ~]# modprobe ip6_tunnel [root@builder2 ~]# modprobe ip6_vti [root@builder2 ~]# echo 1 > /proc/sys/net/core/fb_tunnels_only_for_init_net [root@builder2 ~]# unshare -n [root@builder2 ~]# ip link 1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-19ip_vti: fix a null pointer deferrence when create vti fallback tunnelHaishuang Yan1-1/+2
After set fb_tunnels_only_for_init_net to 1, the itn->fb_tunnel_dev will be NULL and will cause following crash: [ 2742.849298] BUG: unable to handle kernel NULL pointer dereference at 0000000000000941 [ 2742.851380] PGD 800000042c21a067 P4D 800000042c21a067 PUD 42aaed067 PMD 0 [ 2742.852818] Oops: 0002 [#1] SMP PTI [ 2742.853570] CPU: 7 PID: 2484 Comm: unshare Kdump: loaded Not tainted 4.18.0-rc8+ #2 [ 2742.855163] Hardware name: Fedora Project OpenStack Nova, BIOS seabios-1.7.5-11.el7 04/01/2014 [ 2742.856970] RIP: 0010:vti_init_net+0x3a/0x50 [ip_vti] [ 2742.858034] Code: 90 83 c0 48 c7 c2 20 a1 83 c0 48 89 fb e8 6e 3b f6 ff 85 c0 75 22 8b 0d f4 19 00 00 48 8b 93 00 14 00 00 48 8b 14 ca 48 8b 12 <c6> 82 41 09 00 00 04 c6 82 38 09 00 00 45 5b c3 66 0f 1f 44 00 00 [ 2742.861940] RSP: 0018:ffff9be28207fde0 EFLAGS: 00010246 [ 2742.863044] RAX: 0000000000000000 RBX: ffff8a71ebed4980 RCX: 0000000000000013 [ 2742.864540] RDX: 0000000000000000 RSI: 0000000000000013 RDI: ffff8a71ebed4980 [ 2742.866020] RBP: ffff8a71ea717000 R08: ffffffffc083903c R09: ffff8a71ea717000 [ 2742.867505] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8a71ebed4980 [ 2742.868987] R13: 0000000000000013 R14: ffff8a71ea5b49c0 R15: 0000000000000000 [ 2742.870473] FS: 00007f02266c9740(0000) GS:ffff8a71ffdc0000(0000) knlGS:0000000000000000 [ 2742.872143] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2742.873340] CR2: 0000000000000941 CR3: 000000042bc20006 CR4: 00000000001606e0 [ 2742.874821] Call Trace: [ 2742.875358] ops_init+0x38/0xf0 [ 2742.876078] setup_net+0xd9/0x1f0 [ 2742.876789] copy_net_ns+0xb7/0x130 [ 2742.877538] create_new_namespaces+0x11a/0x1d0 [ 2742.878525] unshare_nsproxy_namespaces+0x55/0xa0 [ 2742.879526] ksys_unshare+0x1a7/0x330 [ 2742.880313] __x64_sys_unshare+0xe/0x20 [ 2742.881131] do_syscall_64+0x5b/0x180 [ 2742.881933] entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reproduce: echo 1 > /proc/sys/net/core/fb_tunnels_only_for_init_net modprobe ip_vti unshare -n Fixes: 79134e6ce2c9 ("net: do not create fallback tunnels for non-default namespaces") Cc: Eric Dumazet <edumazet@google.com> Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-19net: sched: always disable bh when taking tcf_lockVlad Buslov7-44/+47
Recently, ops->init() and ops->dump() of all actions were modified to always obtain tcf_lock when accessing private action state. Actions that don't depend on tcf_lock for synchronization with their data path use non-bh locking API. However, tcf_lock is also used to protect rate estimator stats in softirq context by timer callback. Change ops->init() and ops->dump() of all actions to disable bh when using tcf_lock to prevent deadlock reported by following lockdep warning: [ 105.470398] ================================ [ 105.475014] WARNING: inconsistent lock state [ 105.479628] 4.18.0-rc8+ #664 Not tainted [ 105.483897] -------------------------------- [ 105.488511] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 105.494871] swapper/16/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 105.500449] 00000000f86c012e (&(&p->tcfa_lock)->rlock){+.?.}, at: est_fetch_counters+0x3c/0xa0 [ 105.509696] {SOFTIRQ-ON-W} state was registered at: [ 105.514925] _raw_spin_lock+0x2c/0x40 [ 105.519022] tcf_bpf_init+0x579/0x820 [act_bpf] [ 105.523990] tcf_action_init_1+0x4e4/0x660 [ 105.528518] tcf_action_init+0x1ce/0x2d0 [ 105.532880] tcf_exts_validate+0x1d8/0x200 [ 105.537416] fl_change+0x55a/0x268b [cls_flower] [ 105.542469] tc_new_tfilter+0x748/0xa20 [ 105.546738] rtnetlink_rcv_msg+0x56a/0x6d0 [ 105.551268] netlink_rcv_skb+0x18d/0x200 [ 105.555628] netlink_unicast+0x2d0/0x370 [ 105.559990] netlink_sendmsg+0x3b9/0x6a0 [ 105.564349] sock_sendmsg+0x6b/0x80 [ 105.568271] ___sys_sendmsg+0x4a1/0x520 [ 105.572547] __sys_sendmsg+0xd7/0x150 [ 105.576655] do_syscall_64+0x72/0x2c0 [ 105.580757] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.586243] irq event stamp: 489296 [ 105.590084] hardirqs last enabled at (489296): [<ffffffffb507e639>] _raw_spin_unlock_irq+0x29/0x40 [ 105.599765] hardirqs last disabled at (489295): [<ffffffffb507e745>] _raw_spin_lock_irq+0x15/0x50 [ 105.609277] softirqs last enabled at (489292): [<ffffffffb413a6a3>] irq_enter+0x83/0xa0 [ 105.618001] softirqs last disabled at (489293): [<ffffffffb413a800>] irq_exit+0x140/0x190 [ 105.626813] other info that might help us debug this: [ 105.633976] Possible unsafe locking scenario: [ 105.640526] CPU0 [ 105.643325] ---- [ 105.646125] lock(&(&p->tcfa_lock)->rlock); [ 105.650747] <Interrupt> [ 105.653717] lock(&(&p->tcfa_lock)->rlock); [ 105.658514] *** DEADLOCK *** [ 105.665349] 1 lock held by swapper/16/0: [ 105.669629] #0: 00000000a640ad99 ((&est->timer)){+.-.}, at: call_timer_fn+0x10b/0x550 [ 105.678200] stack backtrace: [ 105.683194] CPU: 16 PID: 0 Comm: swapper/16 Not tainted 4.18.0-rc8+ #664 [ 105.690249] Hardware name: Supermicro SYS-2028TP-DECR/X10DRT-P, BIOS 2.0b 03/30/2017 [ 105.698626] Call Trace: [ 105.701421] <IRQ> [ 105.703791] dump_stack+0x92/0xeb [ 105.707461] print_usage_bug+0x336/0x34c [ 105.711744] mark_lock+0x7c9/0x980 [ 105.715500] ? print_shortest_lock_dependencies+0x2e0/0x2e0 [ 105.721424] ? check_usage_forwards+0x230/0x230 [ 105.726315] __lock_acquire+0x923/0x26f0 [ 105.730597] ? debug_show_all_locks+0x240/0x240 [ 105.735478] ? mark_lock+0x493/0x980 [ 105.739412] ? check_chain_key+0x140/0x1f0 [ 105.743861] ? __lock_acquire+0x836/0x26f0 [ 105.748323] ? lock_acquire+0x12e/0x290 [ 105.752516] lock_acquire+0x12e/0x290 [ 105.756539] ? est_fetch_counters+0x3c/0xa0 [ 105.761084] _raw_spin_lock+0x2c/0x40 [ 105.765099] ? est_fetch_counters+0x3c/0xa0 [ 105.769633] est_fetch_counters+0x3c/0xa0 [ 105.773995] est_timer+0x87/0x390 [ 105.777670] ? est_fetch_counters+0xa0/0xa0 [ 105.782210] ? lock_acquire+0x12e/0x290 [ 105.786410] call_timer_fn+0x161/0x550 [ 105.790512] ? est_fetch_counters+0xa0/0xa0 [ 105.795055] ? del_timer_sync+0xd0/0xd0 [ 105.799249] ? __lock_is_held+0x93/0x110 [ 105.803531] ? mark_held_locks+0x20/0xe0 [ 105.807813] ? _raw_spin_unlock_irq+0x29/0x40 [ 105.812525] ? est_fetch_counters+0xa0/0xa0 [ 105.817069] ? est_fetch_counters+0xa0/0xa0 [ 105.821610] run_timer_softirq+0x3c4/0x9f0 [ 105.826064] ? lock_acquire+0x12e/0x290 [ 105.830257] ? __bpf_trace_timer_class+0x10/0x10 [ 105.835237] ? __lock_is_held+0x25/0x110 [ 105.839517] __do_softirq+0x11d/0x7bf [ 105.843542] irq_exit+0x140/0x190 [ 105.847208] smp_apic_timer_interrupt+0xac/0x3b0 [ 105.852182] apic_timer_interrupt+0xf/0x20 [ 105.856628] </IRQ> [ 105.859081] RIP: 0010:cpuidle_enter_state+0xd8/0x4d0 [ 105.864395] Code: 46 ff 48 89 44 24 08 0f 1f 44 00 00 31 ff e8 cf ec 46 ff 80 7c 24 07 00 0f 85 1d 02 00 00 e8 9f 90 4b ff fb 66 0f 1f 44 00 00 <4c> 8b 6c 24 08 4d 29 fd 0f 80 36 03 00 00 4c 89 e8 48 ba cf f7 53 [ 105.884288] RSP: 0018:ffff8803ad94fd20 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 105.892494] RAX: 0000000000000000 RBX: ffffe8fb300829c0 RCX: ffffffffb41e19e1 [ 105.899988] RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff8803ad9358ac [ 105.907503] RBP: ffffffffb6636300 R08: 0000000000000004 R09: 0000000000000000 [ 105.914997] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 105.922487] R13: ffffffffb6636140 R14: ffffffffb66362d8 R15: 000000188d36091b [ 105.929988] ? trace_hardirqs_on_caller+0x141/0x2d0 [ 105.935232] do_idle+0x28e/0x320 [ 105.938817] ? arch_cpu_idle_exit+0x40/0x40 [ 105.943361] ? mark_lock+0x8c1/0x980 [ 105.947295] ? _raw_spin_unlock_irqrestore+0x32/0x60 [ 105.952619] cpu_startup_entry+0xc2/0xd0 [ 105.956900] ? cpu_in_idle+0x20/0x20 [ 105.960830] ? _raw_spin_unlock_irqrestore+0x32/0x60 [ 105.966146] ? trace_hardirqs_on_caller+0x141/0x2d0 [ 105.971391] start_secondary+0x2b5/0x360 [ 105.975669] ? set_cpu_sibling_map+0x1330/0x1330 [ 105.980654] secondary_startup_64+0xa5/0xb0 Taking tcf_lock in sample action with bh disabled causes lockdep to issue a warning regarding possible irq lock inversion dependency between tcf_lock, and psample_groups_lock that is taken when holding tcf_lock in sample init: [ 162.108959] Possible interrupt unsafe locking scenario: [ 162.116386] CPU0 CPU1 [ 162.121277] ---- ---- [ 162.126162] lock(psample_groups_lock); [ 162.130447] local_irq_disable(); [ 162.136772] lock(&(&p->tcfa_lock)->rlock); [ 162.143957] lock(psample_groups_lock); [ 162.150813] <Interrupt> [ 162.153808] lock(&(&p->tcfa_lock)->rlock); [ 162.158608] *** DEADLOCK *** In order to prevent potential lock inversion dependency between tcf_lock and psample_groups_lock, extract call to psample_group_get() from tcf_lock protected section in sample action init function. Fixes: 4e232818bd32 ("net: sched: act_mirred: remove dependency on rtnl lock") Fixes: 764e9a24480f ("net: sched: act_vlan: remove dependency on rtnl lock") Fixes: 729e01260989 ("net: sched: act_tunnel_key: remove dependency on rtnl lock") Fixes: d77284956656 ("net: sched: act_sample: remove dependency on rtnl lock") Fixes: e8917f437006 ("net: sched: act_gact: remove dependency on rtnl lock") Fixes: b6a2b971c0b0 ("net: sched: act_csum: remove dependency on rtnl lock") Fixes: 2142236b4584 ("net: sched: act_bpf: remove dependency on rtnl lock") Signed-off-by: Vlad Buslov <vladbu@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 23:32:28 +0000