Re: [syzbot] [kernel] WARNING: locking bug in try_to_wake_up

[syzbot <syzbot+8aaf2df2ef0164ffe1fb@syzkaller.appspotmail.com>]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
kernel BUG in close_ctree

BTRFS info (device loop0): last unmount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf
assertion failed: list_empty(&fs_info->delalloc_roots), in fs/btrfs/disk-io.c:4327
------------[ cut here ]------------
kernel BUG at fs/btrfs/disk-io.c:4327!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 UID: 0 PID: 5820 Comm: syz-executor Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:close_ctree+0x912/0xd20 fs/btrfs/disk-io.c:4327
Code: ff ff 90 0f 0b e8 7e d1 da f5 48 c7 c7 40 30 4c 8c 48 c7 c6 80 60 4c 8c 48 c7 c2 c0 30 4c 8c b9 e7 10 00 00 e8 0f 9d ff ff 90 <0f> 0b e8 57 d1 da f5 48 c7 c7 40 30 4c 8c 48 c7 c6 20 7c 4c 8c 48
RSP: 0018:ffffc90002f6fb60 EFLAGS: 00010246
RAX: 0000000000000052 RBX: ffff888030de0f28 RCX: 618777cd44da3000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90002f6fd00 R08: ffffffff81749d9c R09: 1ffff920005edf08
R10: dffffc0000000000 R11: fffff520005edf09 R12: ffff888030de0000
R13: dffffc0000000000 R14: 1ffff110061bc272 R15: 0000000000000000
FS:  0000555562490500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00191d740 CR3: 000000007010e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 generic_shutdown_super+0x139/0x2d0 fs/super.c:642
 kill_anon_super+0x3b/0x70 fs/super.c:1237
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2121
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
 task_work_run+0x24f/0x310 kernel/task_work.c:228
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9dd257f327
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd8c162128 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f9dd257f327
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd8c1621e0
RBP: 00007ffd8c1621e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd8c163260
R13: 00007f9dd25f0134 R14: 000000000001c212 R15: 00007ffd8c1632a0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:close_ctree+0x912/0xd20 fs/btrfs/disk-io.c:4327
Code: ff ff 90 0f 0b e8 7e d1 da f5 48 c7 c7 40 30 4c 8c 48 c7 c6 80 60 4c 8c 48 c7 c2 c0 30 4c 8c b9 e7 10 00 00 e8 0f 9d ff ff 90 <0f> 0b e8 57 d1 da f5 48 c7 c7 40 30 4c 8c 48 c7 c6 20 7c 4c 8c 48
RSP: 0018:ffffc90002f6fb60 EFLAGS: 00010246
RAX: 0000000000000052 RBX: ffff888030de0f28 RCX: 618777cd44da3000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90002f6fd00 R08: ffffffff81749d9c R09: 1ffff920005edf08
R10: dffffc0000000000 R11: fffff520005edf09 R12: ffff888030de0000
R13: dffffc0000000000 R14: 1ffff110061bc272 R15: 0000000000000000
FS:  0000555562490500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555624ab5c8 CR3: 000000007010e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


Tested on:

commit:         e32cde8d Merge tag 'sched_ext-for-6.12-rc1-fixes-1' of..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1222ddd0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1f009dd80b3799c2
dashboard link: https://syzkaller.appspot.com/bug?extid=8aaf2df2ef0164ffe1fb
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=169d1980580000