On Fri, Dec 13, 2024 at 8:56 PM syzbot <syzbot+38a0cbd267eff2d286ff@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: 7cb1b4663150 Merge tag 'locking_urgent_for_v6.13_rc3' of g.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=16e96b30580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=fee25f93665c89ac > dashboard link: https://syzkaller.appspot.com/bug?extid=38a0cbd267eff2d286ff > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-7cb1b466.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/13e083329dab/vmlinux-7cb1b466.xz > kernel image: https://storage.googleapis.com/syzbot-assets/fe3847d08513/bzImage-7cb1b466.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+38a0cbd267eff2d286ff@xxxxxxxxxxxxxxxxxxxxxxxxx > > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 80 at mm/list_lru.c:97 lock_list_lru_of_memcg+0x395/0x4e0 mm/list_lru.c:97 > Modules linked in: > CPU: 0 UID: 0 PID: 80 Comm: kswapd0 Not tainted 6.13.0-rc2-syzkaller-00018-g7cb1b4663150 #0 > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 > RIP: 0010:lock_list_lru_of_memcg+0x395/0x4e0 mm/list_lru.c:97 > Code: e9 22 fe ff ff e8 9b cc b6 ff 4c 8b 7c 24 10 45 84 f6 0f 84 40 ff ff ff e9 37 01 00 00 e8 83 cc b6 ff eb 05 e8 7c cc b6 ff 90 <0f> 0b 90 eb 97 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 7a fd ff ff 48 > RSP: 0018:ffffc9000105e798 EFLAGS: 00010093 > RAX: ffffffff81e891c4 RBX: 0000000000000000 RCX: ffff88801f53a440 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 > RBP: ffff888042e70054 R08: ffffffff81e89156 R09: 1ffffffff2032cae > R10: dffffc0000000000 R11: fffffbfff2032caf R12: ffffffff81e88e5e > R13: ffffffff9a3feb20 R14: 0000000000000000 R15: ffff888042e70000 > FS: 0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000020161000 CR3: 0000000032d12000 CR4: 0000000000352ef0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > list_lru_add+0x59/0x270 mm/list_lru.c:164 > list_lru_add_obj+0x17b/0x250 mm/list_lru.c:187 > workingset_update_node+0x1af/0x230 mm/workingset.c:634 > xas_update lib/xarray.c:355 [inline] > update_node lib/xarray.c:758 [inline] > xas_store+0xb8f/0x1890 lib/xarray.c:845 > page_cache_delete mm/filemap.c:149 [inline] > __filemap_remove_folio+0x4e9/0x670 mm/filemap.c:232 > __remove_mapping+0x86f/0xad0 mm/vmscan.c:791 > shrink_folio_list+0x30a6/0x5ca0 mm/vmscan.c:1467 > evict_folios+0x3c86/0x5800 mm/vmscan.c:4593 > try_to_shrink_lruvec+0x9a6/0xc70 mm/vmscan.c:4789 > shrink_one+0x3b9/0x850 mm/vmscan.c:4834 > shrink_many mm/vmscan.c:4897 [inline] > lru_gen_shrink_node mm/vmscan.c:4975 [inline] > shrink_node+0x37c5/0x3e50 mm/vmscan.c:5956 > kswapd_shrink_node mm/vmscan.c:6785 [inline] > balance_pgdat mm/vmscan.c:6977 [inline] > kswapd+0x1ca9/0x36f0 mm/vmscan.c:7246 > kthread+0x2f0/0x390 kernel/kthread.c:389 > ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 > </TASK> This one seems to be related to "mm/list_lru: split the lock to per-cgroup scope". Kairui, can you please take a look? Thanks. > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup >
