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KMSAN: uninit-value in __se_sys_waitid (2)

Status: closed as invalid on 2019/03/14 15:21
Subsystems: kernel
[Documentation on labels]
First crash: 2427d, last: 2364d
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in __se_sys_waitid (3) kernel 7 1 2364d 2364d 0/29 closed as invalid on 2019/03/15 09:01
upstream KMSAN: uninit-value in __se_sys_waitid kernel 7 C 8593 2562d 2580d 0/29 closed as invalid on 2018/09/19 14:13

Sample crash report:
==================================================================
BUG: KMSAN: uninit-value in __do_sys_waitid kernel/exit.c:1612 [inline]
BUG: KMSAN: uninit-value in __se_sys_waitid+0x329/0xb20 kernel/exit.c:1592
CPU: 0 PID: 10923 Comm: syz-executor790 Not tainted 5.0.0-rc1+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x173/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:600
 kmsan_internal_check_memory+0x9e4/0xb10 mm/kmsan/kmsan.c:692
 kmsan_check_memory+0xd/0x10 mm/kmsan/kmsan.c:699
 __do_sys_waitid kernel/exit.c:1612 [inline]
 __se_sys_waitid+0x329/0xb20 kernel/exit.c:1592
 __x64_sys_waitid+0x62/0x80 kernel/exit.c:1592
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x43ffb9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc16b98608 EFLAGS: 00000246 ORIG_RAX: 00000000000000f7
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043ffb9
RDX: 00000000200000c0 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000401840
R13: 00000000004018d0 R14: 0000000000000000 R15: 0000000000000000

Local variable description: ----__pu_val120.i@__se_sys_waitid
Variable was created at:
 __se_sys_waitid+0x18c/0xb20 kernel/exit.c:1592
 __x64_sys_waitid+0x62/0x80 kernel/exit.c:1592

Bytes 0-3 of 4 are uninitialized
Memory access of size 4 starts at ffff88809b73fe78
==================================================================

Crashes (4005):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/02/02 20:34 https://github.com/google/kmsan.git master fa1981bee40f c198d5dd .config console log report syz C ci-upstream-kmsan-gce
2019/01/26 08:48 https://github.com/google/kmsan.git master 02f2d5aea531 ebf7a37c .config console log report syz C ci-upstream-kmsan-gce
2019/03/14 15:09 https://github.com/google/kmsan.git master c530a275757b d09a902e .config console log report ci-upstream-kmsan-gce
2019/03/14 14:49 https://github.com/google/kmsan.git master c530a275757b d09a902e .config console log report ci-upstream-kmsan-gce
2019/03/14 13:43 https://github.com/google/kmsan.git master c530a275757b d09a902e .config console log report ci-upstream-kmsan-gce
2019/03/14 12:16 https://github.com/google/kmsan.git master c530a275757b d09a902e .config console log report ci-upstream-kmsan-gce
2019/03/14 11:05 https://github.com/google/kmsan.git master c530a275757b d09a902e .config console log report ci-upstream-kmsan-gce
2019/03/14 10:15 https://github.com/google/kmsan.git master c530a275757b d09a902e .config console log report ci-upstream-kmsan-gce
2019/03/14 09:04 https://github.com/google/kmsan.git master c530a275757b d09a902e .config console log report ci-upstream-kmsan-gce
2019/03/14 08:02 https://github.com/google/kmsan.git master c530a275757b d09a902e .config console log report ci-upstream-kmsan-gce
2019/03/14 07:59 https://github.com/google/kmsan.git master c530a275757b d09a902e .config console log report ci-upstream-kmsan-gce
2019/03/14 06:53 https://github.com/google/kmsan.git master c530a275757b d09a902e .config console log report ci-upstream-kmsan-gce
2019/03/14 05:46 https://github.com/google/kmsan.git master c530a275757b 2881fc25 .config console log report ci-upstream-kmsan-gce
2019/03/14 04:43 https://github.com/google/kmsan.git master c530a275757b 2881fc25 .config console log report ci-upstream-kmsan-gce
2019/03/14 02:54 https://github.com/google/kmsan.git master c530a275757b 2881fc25 .config console log report ci-upstream-kmsan-gce
2019/03/14 01:43 https://github.com/google/kmsan.git master c530a275757b 2881fc25 .config console log report ci-upstream-kmsan-gce
2019/03/14 00:08 https://github.com/google/kmsan.git master c530a275757b 2881fc25 .config console log report ci-upstream-kmsan-gce
2019/03/13 23:03 https://github.com/google/kmsan.git master c530a275757b 2881fc25 .config console log report ci-upstream-kmsan-gce
2019/03/13 21:52 https://github.com/google/kmsan.git master c530a275757b 2881fc25 .config console log report ci-upstream-kmsan-gce
2019/03/13 20:22 https://github.com/google/kmsan.git master c530a275757b 2881fc25 .config console log report ci-upstream-kmsan-gce
2019/03/13 19:07 https://github.com/google/kmsan.git master c530a275757b 2881fc25 .config console log report ci-upstream-kmsan-gce
2019/03/13 18:02 https://github.com/google/kmsan.git master c530a275757b 2881fc25 .config console log report ci-upstream-kmsan-gce
2019/03/13 17:01 https://github.com/google/kmsan.git master c530a275757b 2881fc25 .config console log report ci-upstream-kmsan-gce
2019/03/13 01:19 https://github.com/google/kmsan.git master a695dc5e929e a71bfb62 .config console log report ci-upstream-kmsan-gce
2019/03/13 00:59 https://github.com/google/kmsan.git master a695dc5e929e a71bfb62 .config console log report ci-upstream-kmsan-gce
2019/03/12 22:58 https://github.com/google/kmsan.git master a695dc5e929e a71bfb62 .config console log report ci-upstream-kmsan-gce
2019/03/12 20:34 https://github.com/google/kmsan.git master a695dc5e929e a71bfb62 .config console log report ci-upstream-kmsan-gce
2019/03/12 17:52 https://github.com/google/kmsan.git master a695dc5e929e a71bfb62 .config console log report ci-upstream-kmsan-gce
2019/03/12 16:02 https://github.com/google/kmsan.git master a695dc5e929e a71bfb62 .config console log report ci-upstream-kmsan-gce
2019/03/12 15:57 https://github.com/google/kmsan.git master a695dc5e929e a71bfb62 .config console log report ci-upstream-kmsan-gce
2019/03/12 14:50 https://github.com/google/kmsan.git master a695dc5e929e a71bfb62 .config console log report ci-upstream-kmsan-gce
2019/03/12 13:41 https://github.com/google/kmsan.git master a695dc5e929e a71bfb62 .config console log report ci-upstream-kmsan-gce
2019/03/12 12:40 https://github.com/google/kmsan.git master a695dc5e929e 12365b99 .config console log report ci-upstream-kmsan-gce
2019/03/12 11:12 https://github.com/google/kmsan.git master a695dc5e929e 12365b99 .config console log report ci-upstream-kmsan-gce
2019/03/12 10:05 https://github.com/google/kmsan.git master a695dc5e929e 12365b99 .config console log report ci-upstream-kmsan-gce
2019/03/12 09:40 https://github.com/google/kmsan.git master a695dc5e929e 12365b99 .config console log report ci-upstream-kmsan-gce
2019/03/12 06:00 https://github.com/google/kmsan.git master a695dc5e929e 12365b99 .config console log report ci-upstream-kmsan-gce
2019/03/12 03:43 https://github.com/google/kmsan.git master a695dc5e929e 12365b99 .config console log report ci-upstream-kmsan-gce
2019/03/12 01:22 https://github.com/google/kmsan.git master a695dc5e929e 12365b99 .config console log report ci-upstream-kmsan-gce
2019/03/11 21:30 https://github.com/google/kmsan.git master a695dc5e929e 12365b99 .config console log report ci-upstream-kmsan-gce
2019/03/11 19:57 https://github.com/google/kmsan.git master a695dc5e929e 12365b99 .config console log report ci-upstream-kmsan-gce
2019/03/11 17:22 https://github.com/google/kmsan.git master a695dc5e929e 12365b99 .config console log report ci-upstream-kmsan-gce
2019/03/11 15:56 https://github.com/google/kmsan.git master a695dc5e929e 12365b99 .config console log report ci-upstream-kmsan-gce
2019/01/11 02:37 https://github.com/google/kmsan.git master 02f2d5aea531 80dde172 .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.