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KMSAN: uninit-value in ext4_inode_journal_mode

Status: auto-closed as invalid on 2021/06/10 23:10
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+b2ffafb709f9a29ec5b4@syzkaller.appspotmail.com
First crash: 1455d, last: 1418d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
KMSAN: uninit-value in ext4_inode_journal_mode 1 (2) 2021/02/09 07:32
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in ext4_inode_journal_mode (2) ext4 170 887d 1117d 0/28 auto-obsoleted due to no activity on 2022/12/23 22:05

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in ext4_inode_journal_mode+0x28b/0x4f0 fs/ext4/ext4_jbd2.c:16
CPU: 1 PID: 12030 Comm: syz-executor.5 Not tainted 5.11.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 ext4_inode_journal_mode+0x28b/0x4f0 fs/ext4/ext4_jbd2.c:16
 ext4_should_journal_data fs/ext4/ext4_jbd2.h:459 [inline]
 ext4_evict_inode+0x1ba/0x2bb0 fs/ext4/inode.c:202
 evict+0x4b8/0xdd0 fs/inode.c:577
 iput_final fs/inode.c:1653 [inline]
 iput+0xb6d/0xee0 fs/inode.c:1679
 __ext4_new_inode+0x3dda/0x9c80 fs/ext4/ialloc.c:1354
 ext4_create+0x47e/0x960 fs/ext4/namei.c:2613
 lookup_open fs/namei.c:3106 [inline]
 open_last_lookups fs/namei.c:3180 [inline]
 path_openat+0x2b71/0x6a30 fs/namei.c:3368
 do_filp_open+0x2b8/0x710 fs/namei.c:3398
 do_sys_openat2+0x25f/0x830 fs/open.c:1172
 do_sys_open fs/open.c:1188 [inline]
 __do_compat_sys_openat fs/open.c:1246 [inline]
 __se_compat_sys_openat+0x2ae/0x310 fs/open.c:1244
 __ia32_compat_sys_openat+0x56/0x70 fs/open.c:1244
 do_syscall_32_irqs_on arch/x86/entry/common.c:79 [inline]
 __do_fast_syscall_32+0x102/0x160 arch/x86/entry/common.c:141
 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:166
 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:209
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f11549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f550b5fc EFLAGS: 00000296 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000580
RDX: 0000000000000042 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags+0x3c/0x90 mm/kmsan/kmsan.c:121
 kmsan_alloc_page+0xd3/0x1f0 mm/kmsan/kmsan_shadow.c:274
 __alloc_pages_nodemask+0x827/0xf90 mm/page_alloc.c:5038
 alloc_pages_current+0x7b6/0xb60 mm/mempolicy.c:2267
 alloc_pages include/linux/gfp.h:547 [inline]
 alloc_slab_page mm/slub.c:1633 [inline]
 allocate_slab+0x392/0x11e0 mm/slub.c:1773
 new_slab mm/slub.c:1836 [inline]
 new_slab_objects mm/slub.c:2593 [inline]
 ___slab_alloc+0xd42/0x1930 mm/slub.c:2756
 __slab_alloc mm/slub.c:2796 [inline]
 slab_alloc_node mm/slub.c:2872 [inline]
 slab_alloc mm/slub.c:2916 [inline]
 kmem_cache_alloc+0xc36/0xff0 mm/slub.c:2921
 ext4_alloc_inode+0x5e/0x870 fs/ext4/super.c:1276
 alloc_inode fs/inode.c:233 [inline]
 new_inode_pseudo+0xa7/0x580 fs/inode.c:927
 new_inode+0x5a/0x3d0 fs/inode.c:956
 __ext4_new_inode+0x3a0/0x9c80 fs/ext4/ialloc.c:956
 ext4_symlink+0x8a4/0x19a0 fs/ext4/namei.c:3336
 vfs_symlink+0x6c4/0x8f0 fs/namei.c:3962
 do_symlinkat+0x389/0x930 fs/namei.c:3989
 __do_sys_symlink fs/namei.c:4008 [inline]
 __se_sys_symlink+0x74/0x90 fs/namei.c:4006
 __ia32_sys_symlink+0x3e/0x60 fs/namei.c:4006
 do_syscall_32_irqs_on arch/x86/entry/common.c:79 [inline]
 __do_fast_syscall_32+0x102/0x160 arch/x86/entry/common.c:141
 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:166
 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:209
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
=====================================================

Crashes (70):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/03/12 23:09 https://github.com/google/kmsan.git master 29ad81a1074a 429d8a6b .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/12 18:56 https://github.com/google/kmsan.git master 29ad81a1074a 429d8a6b .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/12 15:03 https://github.com/google/kmsan.git master 29ad81a1074a 429d8a6b .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/12 13:37 https://github.com/google/kmsan.git master 29ad81a1074a 429d8a6b .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/12 07:14 https://github.com/google/kmsan.git master 29ad81a1074a 429d8a6b .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/11 04:35 https://github.com/google/kmsan.git master 29ad81a1074a 764067f3 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/11 01:29 https://github.com/google/kmsan.git master 29ad81a1074a 764067f3 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/10 14:40 https://github.com/google/kmsan.git master 29ad81a1074a 26967e35 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/10 10:31 https://github.com/google/kmsan.git master 29ad81a1074a 26967e35 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/10 02:42 https://github.com/google/kmsan.git master 29ad81a1074a 26967e35 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/09 13:43 https://github.com/google/kmsan.git master 29ad81a1074a 09fbf400 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/07 14:05 https://github.com/google/kmsan.git master 29ad81a1074a 75506d9c .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/07 05:51 https://github.com/google/kmsan.git master 29ad81a1074a e4b4d570 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/06 12:39 https://github.com/google/kmsan.git master 29ad81a1074a e4b4d570 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/05 18:24 https://github.com/google/kmsan.git master 29ad81a1074a 9d751681 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/03 01:48 https://github.com/google/kmsan.git master 29ad81a1074a e5b64d68 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/01 19:12 https://github.com/google/kmsan.git master 29ad81a1074a 4c37c133 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/03/01 03:13 https://github.com/google/kmsan.git master 29ad81a1074a 4c37c133 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/28 22:59 https://github.com/google/kmsan.git master 29ad81a1074a 4c37c133 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/27 21:13 https://github.com/google/kmsan.git master 29ad81a1074a 4c37c133 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/27 14:26 https://github.com/google/kmsan.git master 29ad81a1074a 4c37c133 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/27 10:58 https://github.com/google/kmsan.git master 29ad81a1074a 4c37c133 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/27 02:29 https://github.com/google/kmsan.git master 29ad81a1074a 4c37c133 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/26 23:43 https://github.com/google/kmsan.git master 29ad81a1074a 4c37c133 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/25 20:25 https://github.com/google/kmsan.git master 29ad81a1074a 76f7fc95 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/25 19:37 https://github.com/google/kmsan.git master 29ad81a1074a 76f7fc95 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/25 15:29 https://github.com/google/kmsan.git master 29ad81a1074a 76f7fc95 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/25 10:27 https://github.com/google/kmsan.git master 29ad81a1074a fcc6d71b .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/24 05:34 https://github.com/google/kmsan.git master 29ad81a1074a fcc6d71b .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/22 22:40 https://github.com/google/kmsan.git master 29ad81a1074a c26fb06b .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/22 18:30 https://github.com/google/kmsan.git master 29ad81a1074a c26fb06b .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/22 06:33 https://github.com/google/kmsan.git master 29ad81a1074a a659b3f1 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/21 22:59 https://github.com/google/kmsan.git master 29ad81a1074a a659b3f1 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/21 11:50 https://github.com/google/kmsan.git master 29ad81a1074a 3e5ed8b4 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/19 23:17 https://github.com/google/kmsan.git master 29ad81a1074a f689d40a .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/18 00:32 https://github.com/google/kmsan.git master 29ad81a1074a 14052202 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/17 21:17 https://github.com/google/kmsan.git master 29ad81a1074a 14052202 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/17 19:27 https://github.com/google/kmsan.git master 29ad81a1074a 052f8d9f .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/17 12:33 https://github.com/google/kmsan.git master 29ad81a1074a 052f8d9f .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/17 12:28 https://github.com/google/kmsan.git master 29ad81a1074a 052f8d9f .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/17 06:12 https://github.com/google/kmsan.git master 29ad81a1074a 98682e5e .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/16 22:34 https://github.com/google/kmsan.git master 29ad81a1074a 98682e5e .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/16 10:46 https://github.com/google/kmsan.git master 29ad81a1074a 98682e5e .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/15 18:57 https://github.com/google/kmsan.git master 29ad81a1074a 98682e5e .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/14 20:02 https://github.com/google/kmsan.git master 29ad81a1074a 98682e5e .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/14 12:48 https://github.com/google/kmsan.git master 29ad81a1074a 98682e5e .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/14 09:09 https://github.com/google/kmsan.git master 29ad81a1074a 98682e5e .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/14 02:54 https://github.com/google/kmsan.git master 29ad81a1074a 98682e5e .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/13 03:37 https://github.com/google/kmsan.git master 29ad81a1074a 98682e5e .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/12 20:17 https://github.com/google/kmsan.git master 29ad81a1074a 98682e5e .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/12 18:01 https://github.com/google/kmsan.git master 29ad81a1074a 98682e5e .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/12 13:26 https://github.com/google/kmsan.git master 29ad81a1074a a5f86b15 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/12 02:00 https://github.com/google/kmsan.git master 29ad81a1074a a5f86b15 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/10 23:17 https://github.com/google/kmsan.git master 73d62e81b476 a52ee10a .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/10 13:26 https://github.com/google/kmsan.git master 73d62e81b476 2bd9619f .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/09 21:54 https://github.com/google/kmsan.git master 73d62e81b476 2bd9619f .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/09 00:53 https://github.com/google/kmsan.git master 73d62e81b476 2bd9619f .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/07 02:59 https://github.com/google/kmsan.git master 73d62e81b476 0655e081 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/07 00:24 https://github.com/google/kmsan.git master 73d62e81b476 0655e081 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/04 20:54 https://github.com/google/kmsan.git master 73d62e81b476 42b90a7c .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/03 22:10 https://github.com/google/kmsan.git master 73d62e81b476 624dad51 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/03 20:32 https://github.com/google/kmsan.git master 73d62e81b476 624dad51 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/03 17:40 https://github.com/google/kmsan.git master 73d62e81b476 624dad51 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/03 05:24 https://github.com/google/kmsan.git master 73d62e81b476 624dad51 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
2021/02/03 04:53 https://github.com/google/kmsan.git master 73d62e81b476 624dad51 .config console log report info ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ext4_inode_journal_mode
* Struck through repros no longer work on HEAD.