syzbot


kernel BUG at mm/slab.c:LINE! (4)

Status: fixed on 2019/06/14 18:22
Subsystems: fs
[Documentation on labels]
Fix commit: 4f661542a402 tcp: fix zerocopy and notsent_lowat issues
First crash: 1934d, last: 1866d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG at mm/slab.c:LINE! (3) mm C done 14 1940d 2067d 11/27 fixed on 2019/03/21 17:09
upstream kernel BUG at mm/slab.c:LINE! (2) hardening mm C 701 2180d 2195d 8/27 fixed on 2018/08/07 13:43
upstream kernel BUG at mm/slab.c:LINE! C 860 2500d 2504d 3/27 fixed on 2017/10/24 06:54
linux-4.14 kernel BUG at mm/slab.c:LINE! C inconclusive 23 1177d 1803d 0/1 upstream: reported C repro on 2019/08/04 15:26

Sample crash report:
------------[ cut here ]------------
kernel BUG at mm/slab.c:2899!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3876 Comm: udevd Not tainted 5.2.0-rc2+ #36
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:alloc_block mm/slab.c:2899 [inline]
RIP: 0010:cache_alloc_refill mm/slab.c:2958 [inline]
RIP: 0010:____cache_alloc mm/slab.c:3061 [inline]
RIP: 0010:____cache_alloc mm/slab.c:3044 [inline]
RIP: 0010:__do_cache_alloc mm/slab.c:3283 [inline]
RIP: 0010:slab_alloc mm/slab.c:3318 [inline]
RIP: 0010:kmem_cache_alloc+0x5f8/0x6f0 mm/slab.c:3488
Code: 45 c8 4c 89 62 08 48 89 53 08 48 89 4b 10 4c 89 60 48 41 f6 45 23 40 0f 84 3d ff ff ff 48 c7 43 20 00 00 00 00 e9 30 ff ff ff <0f> 0b 0f 0b c7 46 0c 01 00 00 00 e9 42 ff ff ff 0f 1f 44 00 00 8b
RSP: 0018:ffff8880954b7d40 EFLAGS: 00010082
RAX: 0000000000000001 RBX: ffffea00018b2600 RCX: ffff8880aa592438
RDX: ffff8880aa592438 RSI: 0000000000000000 RDI: ffff8880aa592400
RBP: ffff8880954b7da8 R08: 1ffff11012a96f95 R09: 0000000000000004
R10: ffffed1012a96f95 R11: 0000000000000003 R12: ffff8880aa594c40
R13: ffff8880aa594c40 R14: 0000000000000004 R15: ffffe8ffffd04cf0
FS:  00007fa1eb78e7a0(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1eb794000 CR3: 00000000958d8000 CR4: 00000000001406e0
Call Trace:
 getname_flags fs/namei.c:138 [inline]
 getname_flags+0xd6/0x5b0 fs/namei.c:128
 getname+0x1a/0x20 fs/namei.c:209
 do_sys_open+0x2c9/0x5d0 fs/open.c:1064
 __do_sys_open fs/open.c:1088 [inline]
 __se_sys_open fs/open.c:1083 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1083
 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fa1eae96120
Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24
RSP: 002b:00007fffd49228a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00000000012584a0 RCX: 00007fa1eae96120
RDX: 00000000000001b6 RSI: 0000000000080000 RDI: 00007fffd4922970
RBP: 00007fffd4922920 R08: 0000000000000008 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 000000000041f57a R14: 0000000001249290 R15: 0000000001247250
Modules linked in:

======================================================

Crashes (12):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/06/02 12:59 net-old e8d67fa5696e 53c81ea5 .config console log report ci-upstream-net-this-kasan-gce
2019/05/30 11:49 net-old 58e8b37069ff d9aaf3c2 .config console log report ci-upstream-net-this-kasan-gce
2019/05/24 11:08 net-old b5730061d105 0dadcd9d .config console log report ci-upstream-net-this-kasan-gce
2019/05/23 13:21 net-old 903869bd10e6 0dadcd9d .config console log report ci-upstream-net-this-kasan-gce
2019/04/29 04:09 net-old 21f1b8a6636c b617407b .config console log report ci-upstream-net-this-kasan-gce
2019/04/17 13:33 net-old 3b2e2904deb3 b0e8efcb .config console log report ci-upstream-net-this-kasan-gce
2019/04/08 13:03 net-old b959ecf8f953 c34fde03 .config console log report ci-upstream-net-this-kasan-gce
2019/06/02 15:20 net-next-old c1e9e01d4233 53c81ea5 .config console log report ci-upstream-net-kasan-gce
2019/05/28 16:22 net-next-old cec4f328c929 6bd61501 .config console log report ci-upstream-net-kasan-gce
2019/04/16 16:49 net-next-old 432bc230700f 505ab413 .config console log report ci-upstream-net-kasan-gce
2019/03/30 12:12 net-next-old 35f861e3c58e c35ee0ea .config console log report ci-upstream-net-kasan-gce
2019/03/27 06:13 net-next-old be67101fbf27 55684ce1 .config console log report ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.