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2017-04-28block: add kblock_mod_delayed_work_on()Jens Axboe
This modifies (or adds, if not currently pending) an existing delayed work item. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-28blk-mq: unify hctx delayed_run_work and run_workJens Axboe
They serve the exact same purpose. Get rid of the non-delayed work variant, and just run it without delay for the normal case. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-28nbd: fix use after free on module unloadJosef Bacik
list_for_each_entry() isn't super safe if we're freeing the objects while we traverse the list. Also don't bother taking the extra reference, the module refcounting stuff will save us from having anybody messing with the device while we're trying to unload. Reported-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-28MAINTAINERS: bfq: Add Paolo as maintainer for the BFQ I/O schedulerUlf Hansson
Seems like this was forgotten in the bfq-series from Paolo. Let's do it now so people don't miss out involving Paolo for any future changes or when reporting bugs. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-28cifs: don't check for failure from mempool_alloc()NeilBrown
mempool_alloc() cannot fail if the gfp flags allow it to sleep, and both GFP_FS allows for sleeping. So these tests of the return value from mempool_alloc() cannot be needed. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Steve French <smfrench@gmail.com>
2017-04-28Do not return number of bytes written for ioctl CIFS_IOC_COPYCHUNK_FILESachin Prabhu
commit 620d8745b35d ("Introduce cifs_copy_file_range()") changes the behaviour of the cifs ioctl call CIFS_IOC_COPYCHUNK_FILE. In case of successful writes, it now returns the number of bytes written. This return value is treated as an error by the xfstest cifs/001. Depending on the errno set at that time, this may or may not result in the test failing. The patch fixes this by setting the return value to 0 in case of successful writes. Fixes: commit 620d8745b35d ("Introduce cifs_copy_file_range()") Reported-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Acked-by: Pavel Shilovsky <pshilov@microsoft.com> Cc: stable@vger.kernel.org Signed-off-by: Steve French <smfrench@gmail.com>
2017-04-28Fix match_prepath()Sachin Prabhu
Incorrect return value for shares not using the prefix path means that we will never match superblocks for these shares. Fixes: commit c1d8b24d1819 ("Compare prepaths when comparing superblocks") Cc: stable@vger.kernel.org Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com> Signed-off-by: Steve French <smfrench@gmail.com>
2017-04-28x86/KASLR: Fix kexec kernel boot crash when KASLR randomization failsBaoquan He
Dave found that a kdump kernel with KASLR enabled will reset to the BIOS immediately if physical randomization failed to find a new position for the kernel. A kernel with the 'nokaslr' option works in this case. The reason is that KASLR will install a new page table for the identity mapping, while it missed building it for the original kernel location if KASLR physical randomization fails. This only happens in the kexec/kdump kernel, because the identity mapping has been built for kexec/kdump in the 1st kernel for the whole memory by calling init_pgtable(). Here if physical randomizaiton fails, it won't build the identity mapping for the original area of the kernel but change to a new page table '_pgtable'. Then the kernel will triple fault immediately caused by no identity mappings. The normal kernel won't see this bug, because it comes here via startup_32() and CR3 will be set to _pgtable already. In startup_32() the identity mapping is built for the 0~4G area. In KASLR we just append to the existing area instead of entirely overwriting it for on-demand identity mapping building. So the identity mapping for the original area of kernel is still there. To fix it we just switch to the new identity mapping page table when physical KASLR succeeds. Otherwise we keep the old page table unchanged just like "nokaslr" does. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Dave Young <dyoung@redhat.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: Borislav Petkov <bp@suse.de> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Garnier <thgarnie@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yinghai Lu <yinghai@kernel.org> Link: http://lkml.kernel.org/r/1493278940-5885-1-git-send-email-bhe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-04-27pstore: Solve lockdep warning by moving inode locksKees Cook
Lockdep complains about a possible deadlock between mount and unlink (which is technically impossible), but fixing this improves possible future multiple-backend support, and keeps locking in the right order. The lockdep warning could be triggered by unlinking a file in the pstore filesystem: -> #1 (&sb->s_type->i_mutex_key#14){++++++}: lock_acquire+0xc9/0x220 down_write+0x3f/0x70 pstore_mkfile+0x1f4/0x460 pstore_get_records+0x17a/0x320 pstore_fill_super+0xa4/0xc0 mount_single+0x89/0xb0 pstore_mount+0x13/0x20 mount_fs+0xf/0x90 vfs_kern_mount+0x66/0x170 do_mount+0x190/0xd50 SyS_mount+0x90/0xd0 entry_SYSCALL_64_fastpath+0x1c/0xb1 -> #0 (&psinfo->read_mutex){+.+.+.}: __lock_acquire+0x1ac0/0x1bb0 lock_acquire+0xc9/0x220 __mutex_lock+0x6e/0x990 mutex_lock_nested+0x16/0x20 pstore_unlink+0x3f/0xa0 vfs_unlink+0xb5/0x190 do_unlinkat+0x24c/0x2a0 SyS_unlinkat+0x16/0x30 entry_SYSCALL_64_fastpath+0x1c/0xb1 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sb->s_type->i_mutex_key#14); lock(&psinfo->read_mutex); lock(&sb->s_type->i_mutex_key#14); lock(&psinfo->read_mutex); Reported-by: Marta Lofstedt <marta.lofstedt@intel.com> Reported-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Namhyung Kim <namhyung@kernel.org>
2017-04-27docs: Fix a couple typosStan Drozd
This commit gets rid of some minor errors in Documentation/: * cputopology.txt: drawes -> drawers * debugging-via-ohci1394.txt: remove an unnecessary line break * static-keys: statemnts -> statements * zorro.txt: busses -> buses Signed-off-by: Stan Drozd <drozdziak1@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-04-27docs: Fix a spelling error in vfio-mediated-device.txtStan Drozd
This commit fixes a repeated "the" in vfio-mediated-device.txt and reflows the paragraph. Signed-off-by: Stan Drozd <drozdziak1@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-04-27docs: Fix a spelling error in ioctl-number.txtStan Drozd
This commit fixes a misspelled header name in the ioctl numbers list Signed-off-by: Stan Drozd <drozdziak1@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-04-27MAINTAINERS: update file entry for HSI subsystemTobias Klauser
The HSI documentation was moved into Documentation/driver-api/hsi.rst in commit 5e995786850e ("docs: split up serial-interfaces.rst"). Update the corresponding file entry in MAINTAINERS. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-04-27pstore: Fix flags to enable dumps on powerpcAnkit Kumar
After commit c950fd6f201a kernel registers pstore write based on flag set. Pstore write for powerpc is broken as flags(PSTORE_FLAGS_DMESG) is not set for powerpc architecture. On panic, kernel doesn't write message to /fs/pstore/dmesg*(Entry doesn't gets created at all). This patch enables pstore write for powerpc architecture by setting PSTORE_FLAGS_DMESG flag. Fixes: c950fd6f201a ("pstore: Split pstore fragile flags") Cc: stable@vger.kernel.org # v4.9+ Signed-off-by: Ankit Kumar <ankit@linux.vnet.ibm.com> Signed-off-by: Kees Cook <keescook@chromium.org>
2017-04-27pstore: Remove unused vmalloc.h in pmsgGeliang Tang
Since the vmalloc code has been removed from write_pmsg() in the commit "5bf6d1b pstore/pmsg: drop bounce buffer", remove the unused header vmalloc.h. Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org>
2017-04-27Merge tag 'nfsd-4.11-3' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
Pull nfsd fixes from Bruce Fields: "Thanks to Ari Kauppi and Tuomas Haanpää at Synopsis for spotting bugs in our NFSv2/v3 xdr code that could crash the server or leak memory" * tag 'nfsd-4.11-3' of git://linux-nfs.org/~bfields/linux: nfsd: stricter decoding of write-like NFSv2/v3 ops nfsd4: minor NFSv2/v3 write decoding cleanup nfsd: check for oversized NFSv2/v3 arguments
2017-04-27Merge tag 'ceph-for-4.11-rc9' of git://github.com/ceph/ceph-clientLinus Torvalds
Pull ceph fix from Ilya Dryomov: "A fix for a kernel stack overflow bug in ceph setattr code, marked for stable" * tag 'ceph-for-4.11-rc9' of git://github.com/ceph/ceph-client: ceph: fix recursion between ceph_set_acl() and __ceph_setattr()
2017-04-27Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs fixes from Al Viro: - fix orangefs handling of faults on write() - I'd missed that one back when orangefs was going through review. - readdir counterpart of "9p: cope with bogus responses from server in p9_client_{read,write}" - server might be lying or broken, and we'd better not overrun the kmalloc'ed buffer we are copying the results into. - NFS O_DIRECT read/write can leave iov_iter advanced by too much; that's what had been causing iov_iter_pipe() warnings davej had been seeing. - statx_timestamp.tv_nsec type fix (s32 -> u32). That one really should go in before 4.11. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: uapi: change the type of struct statx_timestamp.tv_nsec to unsigned fix nfs O_DIRECT advancing iov_iter too much p9_client_readdir() fix orangefs_bufmap_copy_from_iovec(): fix EFAULT handling
2017-04-27statx: correct error handling of NULL pathnameMichael Kerrisk (man-pages)
The change in commit 1e2f82d1e9d1 ("statx: Kill fd-with-NULL-path support in favour of AT_EMPTY_PATH") to error on a NULL pathname to statx() is inconsistent. It results in the error EINVAL for a NULL pathname. Other system calls with similar APIs (fchownat(), fstatat(), linkat()), return EFAULT. The solution is simply to remove the EINVAL check. As I already pointed out in [1], user_path_at*() and filename_lookup() will handle the NULL pathname as per the other APIs, to correctly produce the error EFAULT. [1] https://lkml.org/lkml/2017/4/26/561 Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com> Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-04-27Merge branch 'nvme-4.12' of git://git.infradead.org/nvme into ↵Jens Axboe
for-4.12/post-merge Christoph writes: "A couple more updates for 4.12. The biggest pile is fc and lpfc updates from James, but there are various small fixes and cleanups as well." Fixes up a few merge issues, and also a warning in lpfc_nvmet_rcv_unsol_abort() if CONFIG_NVME_TARGET_FC isn't enabled. Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-27blk-mq-sched: alloate reserved tags out of normal poolJens Axboe
At least one driver, mtip32xx, has a hard coded dependency on the value of the reserved tag used for internal commands. While that should really be fixed up, for now let's ensure that we just bypass the scheduler tags an allocation marked as reserved. They are used for house keeping or error handling, so we can safely ignore them in the scheduler. Tested-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-27mtip32xx: use runtime tag to initialize command headerMing Lei
mtip32xx supposes that 'request_idx' passed to .init_request() is tag of the request, and use that as request's tag to initialize command header. After MQ IO scheduler is in, request tag assigned isn't same with the request index anymore, so cause strange hardware failure on mtip32xx, even whole system panic is triggered. This patch fixes the issue by initializing command header via request's real tag. Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-27EDAC, ghes: Do not enable it by defaultBorislav Petkov
Leave it to the user to decide whether to enable this or not. Otherwise, platform-specific drivers won't initialize (currently, EDAC supports only a single platform driver loaded). Signed-off-by: Borislav Petkov <bp@suse.de>
2017-04-27mailbox: handle empty message in tx_tickSudeep Holla
We already check if the message is empty before calling the client tx_done callback. Calling completion on a wait event is also invalid if the message is empty. This patch moves the existing empty message check earlier. Fixes: 2b6d83e2b8b7 ("mailbox: Introduce framework for mailbox") Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-04-27mailbox: skip complete wait event if timer expiredSudeep Holla
If a wait_for_completion_timeout() call returns due to a timeout, complete() can get called after returning from the wait which is incorrect and can cause subsequent transmissions on a channel to fail. Since the wait_for_completion_timeout() sees the completion variable is non-zero caused by the erroneous/spurious complete() call, and it immediately returns without waiting for the time as expected by the client. This patch fixes the issue by skipping complete() call for the timer expiry. Fixes: 2b6d83e2b8b7 ("mailbox: Introduce framework for mailbox") Reported-by: Alexey Klimov <alexey.klimov@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-04-27mailbox: always wait in mbox_send_message for blocking Tx modeSudeep Holla
There exists a race when msg_submit return immediately as there was an active request being processed which may have completed just before it's checked again in mbox_send_message. This will result in return to the caller without waiting in mbox_send_message even when it's blocking Tx. This patch fixes the issue by waiting for the completion always if Tx is in blocking mode. Fixes: 2b6d83e2b8b7 ("mailbox: Introduce framework for mailbox") Reported-by: Alexey Klimov <alexey.klimov@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Reviewed-by: Alexey Klimov <alexey.klimov@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2017-04-27xfrm: fix GRO for !CONFIG_NETFILTERSabrina Dubroca
In xfrm_input() when called from GRO, async == 0, and we end up skipping the processing in xfrm4_transport_finish(). GRO path will always skip the NF_HOOK, so we don't need the special-case for !NETFILTER during GRO processing. Fixes: 7785bba299a8 ("esp: Add a software GRO codepath") Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2017-04-27sched/cputime: Fix ksoftirqd cputime accounting regressionFrederic Weisbecker
irq_time_read() returns the irqtime minus the ksoftirqd time. This is necessary because irq_time_read() is used to substract the IRQ time from the sum_exec_runtime of a task. If we were to include the softirq time of ksoftirqd, this task would substract its own CPU time everytime it updates ksoftirqd->sum_exec_runtime which would therefore never progress. But this behaviour got broken by: a499a5a14db ("sched/cputime: Increment kcpustat directly on irqtime account") ... which now includes ksoftirqd softirq time in the time returned by irq_time_read(). This has resulted in wrong ksoftirqd cputime reported to userspace through /proc/stat and thus "top" not showing ksoftirqd when it should after intense networking load. ksoftirqd->stime happens to be correct but it gets scaled down by sum_exec_runtime through task_cputime_adjusted(). To fix this, just account the strict IRQ time in a separate counter and use it to report the IRQ time. Reported-and-tested-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Reviewed-by: Rik van Riel <riel@redhat.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wanpeng Li <wanpeng.li@hotmail.com> Link: http://lkml.kernel.org/r/1493129448-5356-1-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-04-27nvme-scsi: remove nvme_trans_security_protocolChristoph Hellwig
This function just returns the same error code and sense data as the default statement in the switch in the caller. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <keith.busch@intel.com>
2017-04-27Merge branch 's390forkvm' of ↵Martin Schwidefsky
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into features Pull cpacf changes for KVM from Jason Herne: Add query support for the KMA instruction.
2017-04-26uapi: change the type of struct statx_timestamp.tv_nsec to unsignedDmitry V. Levin
The comment asserting that the value of struct statx_timestamp.tv_nsec must be negative when statx_timestamp.tv_sec is negative, is wrong, as could be seen from the following example: #define _FILE_OFFSET_BITS 64 #include <assert.h> #include <fcntl.h> #include <stdio.h> #include <sys/stat.h> #include <unistd.h> #include <asm/unistd.h> #include <linux/stat.h> int main(void) { static const struct timespec ts[2] = { { .tv_nsec = UTIME_OMIT }, { .tv_sec = -2, .tv_nsec = 42 } }; assert(utimensat(AT_FDCWD, ".", ts, 0) == 0); struct stat st; assert(stat(".", &st) == 0); printf("st_mtim.tv_sec = %lld, st_mtim.tv_nsec = %lu\n", (long long) st.st_mtim.tv_sec, (unsigned long) st.st_mtim.tv_nsec); struct statx stx; assert(syscall(__NR_statx, AT_FDCWD, ".", 0, 0, &stx) == 0); printf("stx_mtime.tv_sec = %lld, stx_mtime.tv_nsec = %lu\n", (long long) stx.stx_mtime.tv_sec, (unsigned long) stx.stx_mtime.tv_nsec); return 0; } It expectedly prints: st_mtim.tv_sec = -2, st_mtim.tv_nsec = 42 stx_mtime.tv_sec = -2, stx_mtime.tv_nsec = 42 The more generic comment asserting that the value of struct statx_timestamp.tv_nsec might be negative is confusing to say the least. It contradicts both the struct stat.st_[acm]time_nsec tradition and struct timespec.tv_nsec requirements in utimensat syscall. If statx syscall ever returns a stx_[acm]time containing a negative tv_nsec that cannot be passed unmodified to utimensat syscall, it will cause an immense confusion. Fix this source of confusion by changing the type of struct statx_timestamp.tv_nsec from __s32 to __u32. Fixes: a528d35e8bfc ("statx: Add a system call to make enhanced file info available") Signed-off-by: Dmitry V. Levin <ldv@altlinux.org> Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-api@vger.kernel.org cc: mtk.manpages@gmail.com Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-04-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparcLinus Torvalds
Pull sparc fixes from David Miller: "I didn't want the release to go out without the statx system call properly hooked up" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: sparc: Update syscall tables. sparc64: Fill in rest of HAVE_REGS_AND_STACK_ACCESS_API
2017-04-26statx: Kill fd-with-NULL-path support in favour of AT_EMPTY_PATHDavid Howells
With the new statx() syscall, the following both allow the attributes of the file attached to a file descriptor to be retrieved: statx(dfd, NULL, 0, ...); and: statx(dfd, "", AT_EMPTY_PATH, ...); Change the code to reject the first option, though this means copying the path and engaging pathwalk for the fstat() equivalent. dfd can be a non-directory provided path is "". [ The timing of this isn't wonderful, but applying this now before we have statx() in any released kernel, before anybody starts using the NULL special case. - Linus ] Fixes: a528d35e8bfc ("statx: Add a system call to make enhanced file info available") Reported-by: Michael Kerrisk <mtk.manpages@gmail.com> Signed-off-by: David Howells <dhowells@redhat.com> cc: Eric Sandeen <sandeen@sandeen.net> cc: fstests@vger.kernel.org cc: linux-api@vger.kernel.org cc: linux-man@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-04-26scsi: Implement blk_mq_ops.show_rq()Bart Van Assche
Show the SCSI CDB for pending SCSI commands in /sys/kernel/debug/block/*/mq/*/dispatch and */rq_list. An example of how SCSI commands are displayed by this code: ffff8801703245c0 {.op=READ, .cmd_flags=META PRIO, .rq_flags=DONTPREP IO_STAT STATS, .tag=14, .internal_tag=-1, .cmd=Read(10) 28 00 2a 81 1b 30 00 00 08 00} Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Hannes Reinecke <hare@suse.com> Cc: <linux-scsi@vger.kernel.org> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-26blk-mq: Add blk_mq_ops.show_rq()Bart Van Assche
This new callback function will be used in the next patch to show more information about SCSI requests. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Cc: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-26blk-mq: Show operation, cmd_flags and rq_flags namesBart Van Assche
Show the operation name, .cmd_flags and .rq_flags as names instead of numbers. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-26blk-mq: Make blk_flags_show() callers append a newline characterBart Van Assche
This patch does not change any functionality but makes it possible to produce a single line of output with multiple flag-to-name translations. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-26blk-mq: Move the "state" debugfs attribute one level downBart Van Assche
Move the "state" attribute from the top level to the "mq" directory as requested by Omar. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-26blk-mq: Unregister debugfs attributes earlierBart Van Assche
We currently call blk_mq_free_queue() from blk_cleanup_queue() before we unregister the debugfs attributes for that queue in blk_release_queue(). This leaves a window open during which accessing most of the mq debugfs attributes would cause a use-after-free. Additionally, the "state" attribute allows running the queue, which we should not do after the queue has entered the "dead" state. Fix both cases by unregistering the debugfs attributes before freeing queue resources starts. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-26blk-mq: Only unregister hctxs for which registration succeededBart Van Assche
Hctx unregistration involves calling kobject_del(). kobject_del() must not be called if kobject_add() has not been called. Hence in the error path only unregister hctxs for which registration succeeded. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Omar Sandoval <osandov@fb.com> Cc: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-26blk-mq-debugfs: Rename functions for registering and unregistering the mq ↵Bart Van Assche
directory Since the blk_mq_debugfs_*register_hctxs() functions register and unregister all attributes under the "mq" directory, rename these into blk_mq_debugfs_*register_mq(). Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-26blk-mq: Let blk_mq_debugfs_register() look up the queue nameBart Van Assche
A later patch will move the call of blk_mq_debugfs_register() to a function to which the queue name is not passed as an argument. To avoid having to add a 'name' argument to multiple callers, let blk_mq_debugfs_register() look up the queue name. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-26blk-mq: Register <dev>/queue/mq after having registered <dev>/queueBart Van Assche
A later patch in this series will modify blk_mq_debugfs_register() such that it uses q->kobj.parent to determine the name of a request queue. Hence make sure that that pointer is initialized before blk_mq_debugfs_register() is called. To avoid lock inversion, protect sysfs / debugfs registration with the queue sysfs_lock instead of the global mutex all_q_mutex. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-04-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) MLX5 bug fixes from Saeed Mahameed et al: - released wrong resources when firmware timeout happens - fix wrong check for encapsulation size limits - UAR memory leak - ETHTOOL_GRXCLSRLALL failed to fill in info->data 2) Don't cache l3mdev on mis-matches local route, causes net devices to leak refs. From Robert Shearman. 3) Handle fragmented SKBs properly in macsec driver, the problem is that we were mis-sizing the sgvec table. From Jason A. Donenfeld. 4) We cannot have checksum offload enabled for inner UDP tunneled packet during IPSEC, from Ansis Atteka. 5) Fix double SKB free in ravb driver, from Dan Carpenter. 6) Fix CPU port handling in b53 DSA driver, from Florian Dainelli. 7) Don't use on-stack buffers for usb_control_msg() in CAN usb driver, from Maksim Salau. 8) Fix device leak in macvlan driver, from Herbert Xu. We have to purge the broadcast queue properly on port destroy. 9) Fix tx ring entry limit on EF10 devices in sfc driver. From Bert Kenward. 10) Fix memory leaks in team driver, from Pan Bian. 11) Don't setup ipv6_stub before it can be actually used, from Paolo Abeni. 12) Fix tipc socket flow control accounting, from Parthasarathy Bhuvaragan. 13) Fix crash on module unload in hso driver, from Andreas Kemnade. 14) Fix purging of bridge multicast entries, the problem is that if we don't defer it to ndo_uninit it's possible for new entries to get added after we purge. Fix from Xin Long. 15) Don't return garbage for PACKET_HDRLEN getsockopt, from Alexander Potapenko. 16) Fix autoneg stall properly in PHY layer, and revert micrel driver change that was papering over it. From Alexander Kochetkov. 17) Don't dereference an ipv4 route as an ipv6 one in the ip6_tunnnel code, from Cong Wang. 18) Clear out the congestion control private of the TCP socket in all of the right places, from Wei Wang. 19) rawv6_ioctl measures SKB length incorrectly, fix from Jamie Bainbridge. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (41 commits) ipv6: check raw payload size correctly in ioctl tcp: memset ca_priv data to 0 properly ipv6: check skb->protocol before lookup for nexthop net: core: Prevent from dereferencing null pointer when releasing SKB macsec: dynamically allocate space for sglist Revert "phy: micrel: Disable auto negotiation on startup" net: phy: fix auto-negotiation stall due to unavailable interrupt net/packet: check length in getsockopt() called with PACKET_HDRLEN net: ipv6: regenerate host route if moved to gc list bridge: move bridge multicast cleanup to ndo_uninit ipv6: fix source routing qed: Fix error in the dcbx app meta data initialization. netvsc: fix calculation of available send sections net: hso: fix module unloading tipc: fix socket flow control accounting error at tipc_recv_stream tipc: fix socket flow control accounting error at tipc_send_stream ipv6: move stub initialization after ipv6 setup completion team: fix memory leaks sfc: tx ring can only have 2048 entries for all EF10 NICs macvlan: Fix device ref leak when purging bc_queue ...
2017-04-26ipv6: check raw payload size correctly in ioctlJamie Bainbridge
In situations where an skb is paged, the transport header pointer and tail pointer can be the same because the skb contents are in frags. This results in ioctl(SIOCINQ/FIONREAD) incorrectly returning a length of 0 when the length to receive is actually greater than zero. skb->len is already correctly set in ip6_input_finish() with pskb_pull(), so use skb->len as it always returns the correct result for both linear and paged data. Signed-off-by: Jamie Bainbridge <jbainbri@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-26tcp: memset ca_priv data to 0 properlyWei Wang
Always zero out ca_priv data in tcp_assign_congestion_control() so that ca_priv data is cleared out during socket creation. Also always zero out ca_priv data in tcp_reinit_congestion_control() so that when cc algorithm is changed, ca_priv data is cleared out as well. We should still zero out ca_priv data even in TCP_CLOSE state because user could call connect() on AF_UNSPEC to disconnect the socket and leave it in TCP_CLOSE state and later call setsockopt() to switch cc algorithm on this socket. Fixes: 2b0a8c9ee ("tcp: add CDG congestion control") Reported-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Wei Wang <weiwan@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Acked-by: Yuchung Cheng <ycheng@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-26ipv6: check skb->protocol before lookup for nexthopWANG Cong
Andrey reported a out-of-bound access in ip6_tnl_xmit(), this is because we use an ipv4 dst in ip6_tnl_xmit() and cast an IPv4 neigh key as an IPv6 address: neigh = dst_neigh_lookup(skb_dst(skb), &ipv6_hdr(skb)->daddr); if (!neigh) goto tx_err_link_failure; addr6 = (struct in6_addr *)&neigh->primary_key; // <=== HERE addr_type = ipv6_addr_type(addr6); if (addr_type == IPV6_ADDR_ANY) addr6 = &ipv6_hdr(skb)->daddr; memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr)); Also the network header of the skb at this point should be still IPv4 for 4in6 tunnels, we shold not just use it as IPv6 header. This patch fixes it by checking if skb->protocol is ETH_P_IPV6: if it is, we are safe to do the nexthop lookup using skb_dst() and ipv6_hdr(skb)->daddr; if not (aka IPv4), we have no clue about which dest address we can pick here, we have to rely on callers to fill it from tunnel config, so just fall to ip6_route_output() to make the decision. Fixes: ea3dc9601bda ("ip6_tunnel: Add support for wildcard tunnel endpoints.") Reported-by: Andrey Konovalov <andreyknvl@google.com> Tested-by: Andrey Konovalov <andreyknvl@google.com> Cc: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-26net: core: Prevent from dereferencing null pointer when releasing SKBMyungho Jung
Added NULL check to make __dev_kfree_skb_irq consistent with kfree family of functions. Link: https://bugzilla.kernel.org/show_bug.cgi?id=195289 Signed-off-by: Myungho Jung <mhjungk@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-26macsec: dynamically allocate space for sglistJason A. Donenfeld
We call skb_cow_data, which is good anyway to ensure we can actually modify the skb as such (another error from prior). Now that we have the number of fragments required, we can safely allocate exactly that amount of memory. Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver") Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Acked-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-26Revert "phy: micrel: Disable auto negotiation on startup"David S. Miller
This reverts commit 99f81afc139c6edd14d77a91ee91685a414a1c66. It was papering over the real problem, which is fixed by commit f555f34fdc58 ("net: phy: fix auto-negotiation stall due to unavailable interrupt") Signed-off-by: David S. Miller <davem@davemloft.net>
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