KMSAN: uninit-value in mbind_range (2)

Status: auto-closed as invalid on 2022/09/22 17:16
Subsystems: mm
[Documentation on labels]
First crash: 1804d, last: 1780d
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in mbind_range mm 7 syz, C 5 1805d 1810d 0/29 closed as invalid on 2021/09/27 07:07
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2022/09/22 14:29 22m retest repro https://github.com/google/kmsan.git master no crash log
2022/09/22 10:29 22m retest repro https://github.com/google/kmsan.git master no crash log
2022/09/22 07:29 22m retest repro https://github.com/google/kmsan.git master no crash log
2022/09/22 04:29 22m retest repro https://github.com/google/kmsan.git master no crash log
2022/09/22 01:29 22m retest repro https://github.com/google/kmsan.git master no crash log
2022/09/21 21:29 22m retest repro https://github.com/google/kmsan.git master no crash log
2022/09/21 17:29 22m retest repro https://github.com/google/kmsan.git master no crash log
2022/09/21 14:29 22m retest repro https://github.com/google/kmsan.git master no crash log
2022/09/21 11:29 22m retest repro https://github.com/google/kmsan.git master no crash log
2022/09/21 07:29 23m retest repro https://github.com/google/kmsan.git master no crash log

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in __mpol_equal mm/mempolicy.c:2260 [inline]
BUG: KMSAN: uninit-value in mpol_equal include/linux/mempolicy.h:105 [inline]
BUG: KMSAN: uninit-value in mbind_range+0x1a46/0x1e80 mm/mempolicy.c:806
 __mpol_equal mm/mempolicy.c:2260 [inline]
 mpol_equal include/linux/mempolicy.h:105 [inline]
 mbind_range+0x1a46/0x1e80 mm/mempolicy.c:806
 do_mbind+0xf42/0x15f0 mm/mempolicy.c:1333
 kernel_mbind mm/mempolicy.c:1483 [inline]
 __do_sys_mbind mm/mempolicy.c:1490 [inline]
 __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486
 __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
 slab_alloc_node mm/slub.c:3221 [inline]
 slab_alloc mm/slub.c:3230 [inline]
 kmem_cache_alloc+0x751/0xff0 mm/slub.c:3235
 mpol_new mm/mempolicy.c:293 [inline]
 do_mbind+0x912/0x15f0 mm/mempolicy.c:1289
 kernel_mbind mm/mempolicy.c:1483 [inline]
 __do_sys_mbind mm/mempolicy.c:1490 [inline]
 __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486
 __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae
=====================================================
Kernel panic - not syncing: panic_on_kmsan set ...
CPU: 1 PID: 6366 Comm: syz-executor464 Tainted: G    B             5.15.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1ff/0x28e lib/dump_stack.c:106
 dump_stack+0x25/0x28 lib/dump_stack.c:113
 panic+0x44f/0xdeb kernel/panic.c:232
 kmsan_report+0x2ee/0x300 mm/kmsan/report.c:168
 __msan_warning+0xa9/0xf0 mm/kmsan/instrumentation.c:199
 __mpol_equal mm/mempolicy.c:2260 [inline]
 mpol_equal include/linux/mempolicy.h:105 [inline]
 mbind_range+0x1a46/0x1e80 mm/mempolicy.c:806
 do_mbind+0xf42/0x15f0 mm/mempolicy.c:1333
 kernel_mbind mm/mempolicy.c:1483 [inline]
 __do_sys_mbind mm/mempolicy.c:1490 [inline]
 __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486
 __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9152359829
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f915230b308 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed
RAX: ffffffffffffffda RBX: 00007f91523e13e8 RCX: 00007f9152359829
RDX: 0000000000002001 RSI: 0000000000c00007 RDI: 0000000020012000
RBP: 00007f91523e13e0 R08: 0000000000000000 R09: 0000010000000002
R10: 0000000000000000 R11: 0000000000000246 R12: 0000010000000002
R13: 00007fff0154d06f R14: 00007f915230b400 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (18):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/10/12 11:07 https://github.com/google/kmsan.git master c7f84f4e1147 838e7e2c .config console log report syz C ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/10/07 20:06 https://github.com/google/kmsan.git master c7f84f4e1147 efe0f24d .config console log report syz C ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/10/04 21:25 https://github.com/google/kmsan.git master 90f502f5d016 ce697b49 .config console log report syz C ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/10/02 00:11 https://github.com/google/kmsan.git master 90f502f5d016 cc80db95 .config console log report syz C ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/10/01 04:03 https://github.com/google/kmsan.git master 90f502f5d016 1d849ab4 .config console log report syz C ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/09/29 11:39 https://github.com/google/kmsan.git master 90f502f5d016 d82cb927 .config console log report syz C ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/09/29 07:54 https://github.com/google/kmsan.git master 90f502f5d016 d82cb927 .config console log report syz C ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/09/29 02:17 https://github.com/google/kmsan.git master 90f502f5d016 d82cb927 .config console log report syz C ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/09/28 10:57 https://github.com/google/kmsan.git master cd2c05533838 78494d16 .config console log report syz C ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/09/28 09:48 https://github.com/google/kmsan.git master cd2c05533838 78494d16 .config console log report syz C ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/10/21 22:31 https://github.com/google/kmsan.git master d6493d2046c4 c5cb7da8 .config console log report info ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/10/20 12:59 https://github.com/google/kmsan.git master d6493d2046c4 418a00eb .config console log report info ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/10/19 09:27 https://github.com/google/kmsan.git master d6493d2046c4 24dc29db .config console log report info ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/10/02 12:21 https://github.com/google/kmsan.git master 90f502f5d016 db0f5787 .config console log report info ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/09/28 08:47 https://github.com/google/kmsan.git master cd2c05533838 78494d16 .config console log report info ci-upstream-kmsan-gce KMSAN: uninit-value in mbind_range
2021/10/19 09:22 https://github.com/google/kmsan.git master d6493d2046c4 24dc29db .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in mbind_range
2021/10/02 12:16 https://github.com/google/kmsan.git master 90f502f5d016 db0f5787 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in mbind_range
2021/09/28 11:07 https://github.com/google/kmsan.git master cd2c05533838 78494d16 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in mbind_range
* Struck through repros no longer work on HEAD.