syzbot


WARNING in __mod_memcg_lruvec_state

Status: upstream: reported on 2024/04/02 08:03
Subsystems: mm cgroups
[Documentation on labels]
Reported-by: syzbot+9319a4268a640e26b72b@syzkaller.appspotmail.com
First crash: 15d, last: 15d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [cgroups?] [mm?] WARNING in __mod_memcg_lruvec_state 5 (6) 2024/04/14 04:43

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 30105 at mm/memcontrol.c:865 __mod_memcg_lruvec_state+0x3fa/0x550 mm/memcontrol.c:865
Modules linked in:
CPU: 0 PID: 30105 Comm: syz-executor.2 Not tainted 6.9.0-rc1-syzkaller-00178-g317c7bc0ef03 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__mod_memcg_lruvec_state+0x3fa/0x550 mm/memcontrol.c:865
Code: 45 85 e4 75 1d 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc b8 00 04 00 00 e9 80 fd ff ff 89 c6 e9 a0 fd ff ff 90 <0f> 0b 90 e9 a7 fc ff ff 48 c7 c7 18 43 e1 8f e8 32 51 f8 ff e9 5e
RSP: 0018:ffffc900034beef8 EFLAGS: 00010202
RAX: 0000000000000292 RBX: 0000000000000001 RCX: 1ffffffff1fc2863
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888024b92bc8
RBP: ffff888024b92000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88801c326000 R14: 0000000000000001 R15: ffff888024b92000
FS:  00007f0811bf96c0(0000) GS:ffff88806b000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000cfff1dd CR3: 000000003e4e2000 CR4: 0000000000350ef0
DR0: 0000000000000031 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __update_lru_size include/linux/mm_inline.h:47 [inline]
 lru_gen_update_size include/linux/mm_inline.h:199 [inline]
 lru_gen_add_folio+0x62d/0xe80 include/linux/mm_inline.h:262
 lruvec_add_folio include/linux/mm_inline.h:323 [inline]
 lru_add_fn+0x3fc/0xd80 mm/swap.c:215
 folio_batch_move_lru+0x243/0x400 mm/swap.c:233
 lru_add_drain_cpu+0x534/0x860 mm/swap.c:667
 lru_add_drain+0x109/0x440 mm/swap.c:767
 __folio_batch_release+0x68/0xb0 mm/swap.c:1091
 folio_batch_release include/linux/pagevec.h:101 [inline]
 mpage_prepare_extent_to_map+0x112b/0x14b0 fs/ext4/inode.c:2505
 ext4_do_writepages+0xa9e/0x3250 fs/ext4/inode.c:2632
 ext4_writepages+0x303/0x730 fs/ext4/inode.c:2768
 do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2612
 filemap_fdatawrite_wbc mm/filemap.c:397 [inline]
 filemap_fdatawrite_wbc+0x148/0x1c0 mm/filemap.c:387
 __filemap_fdatawrite_range+0xba/0x100 mm/filemap.c:430
 file_write_and_wait_range+0xd0/0x140 mm/filemap.c:788
 ext4_sync_file+0x296/0xf30 fs/ext4/fsync.c:158
 vfs_fsync_range+0x141/0x230 fs/sync.c:188
 generic_write_sync include/linux/fs.h:2793 [inline]
 ext4_buffered_write_iter+0x2e6/0x3d0 fs/ext4/file.c:305
 ext4_file_write_iter+0x874/0x1a40 fs/ext4/file.c:698
 call_write_iter include/linux/fs.h:2108 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x6db/0x1100 fs/read_write.c:590
 ksys_write+0x12f/0x260 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f0810e7dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0811bf90c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f0810fabf80 RCX: 00007f0810e7dda9
RDX: 0000000000002000 RSI: 0000000020000180 RDI: 0000000000000007
RBP: 00007f0810eca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f0810fabf80 R15: 00007ffd57bcc8d8
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/29 07:52 upstream 317c7bc0ef03 c52bcb23 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in __mod_memcg_lruvec_state
* Struck through repros no longer work on HEAD.