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Date: Sat, 30 Sep 2017 21:44:51 +0800
From: kernel test robot <fengguang.wu@...el.com>
To: Byungchul Park <byungchul.park@....com>
Cc: LKP <lkp@...org>, linux-kernel@...r.kernel.org,
"Peter Zijlstra (Intel)" <peterz@...radead.org>,
Ingo Molnar <mingo@...nel.org>, wfg@...ux.intel.com
Subject: ce07a9415f ("locking/lockdep: Make check_prev_add() able to .."): BUG: unable to handle kernel NULL pointer dereference at 00000020
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit ce07a9415f266e181a0a33033a5f7138760240a4
Author: Byungchul Park <byungchul.park@....com>
AuthorDate: Mon Aug 7 16:12:51 2017 +0900
Commit: Ingo Molnar <mingo@...nel.org>
CommitDate: Thu Aug 10 12:29:06 2017 +0200
locking/lockdep: Make check_prev_add() able to handle external stack_trace
Currently, a space for stack_trace is pinned in check_prev_add(), that
makes us not able to use external stack_trace. The simplest way to
achieve it is to pass an external stack_trace as an argument.
A more suitable solution is to pass a callback additionally along with
a stack_trace so that callers can decide the way to save or whether to
save. Actually crossrelease needs to do other than saving a stack_trace.
So pass a stack_trace and callback to handle it, to check_prev_add().
Signed-off-by: Byungchul Park <byungchul.park@....com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: akpm@...ux-foundation.org
Cc: boqun.feng@...il.com
Cc: kernel-team@....com
Cc: kirill@...temov.name
Cc: npiggin@...il.com
Cc: walken@...gle.com
Cc: willy@...radead.org
Link: http://lkml.kernel.org/r/1502089981-21272-5-git-send-email-byungchul.park@lge.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
70911fdc95 locking/lockdep: Change the meaning of check_prev_add()'s return value
ce07a9415f locking/lockdep: Make check_prev_add() able to handle external stack_trace
74d83ec2b7 Merge tag 'platform-drivers-x86-v4.14-2' of git://git.infradead.org/linux-platform-drivers-x86
1418b85217 Add linux-next specific files for 20170929
+-------------------------------------------------------+------------+------------+------------+---------------+
| | 70911fdc95 | ce07a9415f | 74d83ec2b7 | next-20170929 |
+-------------------------------------------------------+------------+------------+------------+---------------+
| boot_successes | 516 | 129 | 167 | 479 |
| boot_failures | 0 | 6 | 43 | 146 |
| BUG:unable_to_handle_kernel | 0 | 6 | 24 | 42 |
| Oops:#[##] | 0 | 6 | 24 | 42 |
| EIP:iput | 0 | 5 | | |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 6 | 1 | |
| EIP:do_raw_spin_trylock | 0 | 1 | 1 | |
| WARNING:kernel_stack | 0 | 0 | 20 | 110 |
| EIP:update_stack_state | 0 | 0 | 23 | 42 |
| Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 0 | 0 | 23 | 42 |
| invoked_oom-killer:gfp_mask=0x | 0 | 0 | 0 | 16 |
| Mem-Info | 0 | 0 | 0 | 16 |
| EIP:clear_user | 0 | 0 | 0 | 2 |
| EIP:copy_page_to_iter | 0 | 0 | 0 | 1 |
+-------------------------------------------------------+------------+------------+------------+---------------+
procd: Instance odhcpd::instance1 s in a crash loop 6 crashes, 0 seconds since last crash
procd: Instance uhttpd::instance1 s in a crash loop 6 crashes, 0 seconds since last crash
procd: Instance dnsmasq::instance1 s in a crash loop 6 crashes, 0 seconds since last crash
[ 187.661000] Writes: Total: 2 Max/Min: 0/0 Fail: 0
procd: - shutdown -
[ 220.353842] BUG: unable to handle kernel NULL pointer dereference at 00000020
[ 220.354946] IP: iput+0x544/0x650
[ 220.355441] *pde = 00000000
[ 220.355444]
[ 220.356100] Oops: 0000 [#1] PREEMPT SMP
[ 220.356647] CPU: 0 PID: 29697 Comm: umount Not tainted 4.13.0-rc4-00169-gce07a941 #627
[ 220.357790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 220.359217] task: c0a0ba00 task.stack: c0a1e000
[ 220.359881] EIP: iput+0x544/0x650
[ 220.360384] EFLAGS: 00010246 CPU: 0
[ 220.360900] EAX: 00000001 EBX: c0100218 ECX: 00000000 EDX: 00000000
[ 220.361778] ESI: 00000000 EDI: 00000000 EBP: c0a1fdd8 ESP: c0a1fdc0
[ 220.362689] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 220.363502] CR0: 80050033 CR2: 00000020 CR3: 10a03000 CR4: 00000690
[ 220.364427] Call Trace:
[ 220.364816] dentry_unlink_inode+0x176/0x180
[ 220.365449] ? preempt_count_sub+0x1c5/0x2e0
[ 220.366092] __dentry_kill+0x207/0x330
[ 220.366663] shrink_dentry_list+0x5df/0x610
[ 220.367311] shrink_dcache_parent+0x65/0x80
[ 220.367939] do_one_tree+0x13/0x40
[ 220.368449] shrink_dcache_for_umount+0x84/0xe0
[ 220.369132] generic_shutdown_super+0x3e/0x1b0
[ 220.369823] kill_anon_super+0x11/0x20
[ 220.370382] kernfs_kill_sb+0x6c/0x80
[ 220.370912] sysfs_kill_sb+0x1a/0x30
[ 220.371450] deactivate_locked_super+0x4c/0x80
[ 220.372109] deactivate_super+0x100/0x110
[ 220.372701] cleanup_mnt+0xc0/0xe0
[ 220.373206] __cleanup_mnt+0x10/0x20
[ 220.373716] task_work_run+0x7f/0xa0
[ 220.374255] exit_to_usermode_loop+0x100/0x16f
[ 220.374908] do_int80_syscall_32+0x27f/0x2e0
[ 220.375514] entry_INT80_32+0x2f/0x2f
[ 220.376046] EIP: 0xa7f34a69
[ 220.376478] EFLAGS: 00000292 CPU: 0
[ 220.376993] EAX: 00000000 EBX: 080960f0 ECX: a7f76ff4 EDX: 080960d0
[ 220.377904] ESI: 080960d0 EDI: 080960f0 EBP: afe22258 ESP: afe22208
[ 220.378773] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
[ 220.379565] Code: b5 20 56 3c b7 0f 84 64 fe ff ff e9 6b fe ff ff 8d b4 26 00 00 00 00 8b 7b 1c c1 ee 03 31 c9 83 05 ac 56 3c b7 01 83 e6 01 89 f2 <8b> 47 20 89 45 ec b8 c0 1f 30 b7 c7 04 24 00 00 00 00 e8 15 89
[ 220.382358] EIP: iput+0x544/0x650 SS:ESP: 0068:c0a1fdc0
[ 220.383125] CR2: 0000000000000020
[ 220.383597] ---[ end trace 0bfc95b7cf7c8ea4 ]---
[ 220.384273] Kernel panic - not syncing: Fatal exception
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 988e175b9df683ac8c465fca60d64dbe9e4dd81e 520eccdfe187591a51ea9ab4c1a024ae4d0f68d9 --
git bisect good d68e68e5fb7134427c6d79c58beaaf869543f3f7 # 08:24 G 19 0 0 0 IB/hfi1: Fix whitespace alignment issue for MAD
git bisect good 64b19e1323e96c34af7ca90d1954e70890c7a98e # 08:44 G 19 0 0 0 IB/core: Export ioctl enum types to user-space
git bisect good 1993519be8bc86342687c61d8d11c3ade62b3b84 # 09:16 G 19 0 0 0 bnxt_re: Fix memory leak in FRMR path
git bisect bad e930b4d8a52067c773d9cd6f6bdd7d4ddc99563f # 09:28 B 10 2 1 1 RDMA/hns: remove redundant assignment to variable j
git bisect bad 0ff4b7e6db6db3341a99a3f0afb5eb8927feb8ab # 10:05 B 16 3 4 4 Merge branch 'vnic' into k.o/for-next
git bisect bad 7ae6f2a3d552dc01c4423c0cdede1daa9fd07991 # 10:20 B 0 1 14 0 Merge branch 'qedr' into k.o/for-next
git bisect good 89aaca54ba60e91f02c1c168fbef5d71f71a6d43 # 10:55 G 55 0 0 2 bnxt_re: Don't issue cmd to delete GID for QP1 GID entry before the QP is destroyed
git bisect bad 0d9c2ff1c9f7f8b339fc42ac9763b28c71f1c115 # 11:19 B 19 1 2 3 Merge tag 'v4.14-rc2' into k.o/for-next
git bisect bad aae3dbb4776e7916b6cd442d00159bea27a695c1 # 11:41 B 1 1 0 0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
git bisect bad 04759194dc447ff0b9ef35bc641ce3bb076c2930 # 12:19 B 52 1 5 5 Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
git bisect good 735f463af70e9601881ec879961ec42aef051733 # 13:15 G 177 0 0 5 Merge tag 'drm-intel-next-2017-08-18' of git://anongit.freedesktop.org/git/drm-intel into drm-next
git bisect good 0081a0ce809b611c1f37da5d6ae5bc8027ffd1c4 # 13:15 G 309 0 0 1 Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 5f82e71a001d14824a7728ad9e49f6aea420f161 # 13:15 B 42 5 0 13 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 475fb533fb7d3dcf009a434f9b9ea238b93f4cb8 # 13:56 G 180 0 0 3 perf evsel: Fix buffer overflow while freeing events
git bisect good b0c79f49c343cda8954b3322984c32f258ca4ccb # 15:32 G 174 0 0 0 Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 0c2364791343e4b04cd1f097ff2abc2799062448 # 15:46 B 11 1 4 6 Merge branch 'x86/asm' into locking/core
git bisect good a9668cd6ee288c4838bc668880ac085be551cac2 # 16:27 G 175 0 0 6 locking: Remove smp_mb__before_spinlock()
git bisect bad cd8084f91c02c1afd256a39aa833bff737631304 # 16:45 B 32 1 3 6 locking/lockdep: Apply crossrelease to completions
git bisect good 70911fdc9576f4eeb3986689a1c9a778a4a4aacb # 17:42 G 174 0 0 0 locking/lockdep: Change the meaning of check_prev_add()'s return value
git bisect bad 23f873d8f9526ed7e49a1a02a45f8afb9ae5fb84 # 17:51 B 0 1 14 0 locking/lockdep: Detect and handle hist_lock ring buffer overwrite
git bisect bad b09be676e0ff25bd6d2e7637e26d349f9109ad75 # 17:52 B 54 10 0 11 locking/lockdep: Implement the 'crossrelease' feature
git bisect bad ce07a9415f266e181a0a33033a5f7138760240a4 # 17:52 B 71 6 0 0 locking/lockdep: Make check_prev_add() able to handle external stack_trace
# first bad commit: [ce07a9415f266e181a0a33033a5f7138760240a4] locking/lockdep: Make check_prev_add() able to handle external stack_trace
git bisect good 70911fdc9576f4eeb3986689a1c9a778a4a4aacb # 21:42 G 512 0 0 0 locking/lockdep: Change the meaning of check_prev_add()'s return value
# extra tests on HEAD of dledford/k.o/for-next
git bisect bad 988e175b9df683ac8c465fca60d64dbe9e4dd81e # 21:43 B 6 5 0 3 RDMA/hns: Fix calltrace for sleeping in atomic
# extra tests on tree/branch linus/master
git bisect bad 74d83ec2b73457449918c315e40622c03a3659a6 # 21:43 B 163 24 0 19 Merge tag 'platform-drivers-x86-v4.14-2' of git://git.infradead.org/linux-platform-drivers-x86
# extra tests on tree/branch linux-next/master
git bisect bad 1418b852174ad50b3cb4738b8801626aefdc0bd9 # 21:44 B 472 42 0 104 Add linux-next specific files for 20170929
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
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