[btrfs?] WARNING in btrfs_sync_log

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=164b21c5480000
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=9d994027534e6c98036a
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/98c0bdb4abb3/disk-3f8a27f9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ea228ff02669/vmlinux-3f8a27f9.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9d9940...@syzkaller.appspotmail.com

RBP: 00007fee35ea51d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffe6b47d30f R14: 00007fee35ea5300 R15: 0000000000022000
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1698 at fs/btrfs/tree-log.c:3097 btrfs_sync_log+0x1d22/0x2170 fs/btrfs/tree-log.c:3097
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 1698 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
panic+0x26a/0x50e kernel/panic.c:186
__warn.cold+0x20/0x5a kernel/panic.c:541
report_bug+0x262/0x2b0 lib/bug.c:183
fixup_bug arch/x86/kernel/traps.c:178 [inline]
fixup_bug arch/x86/kernel/traps.c:173 [inline]
do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:btrfs_sync_log+0x1d22/0x2170 fs/btrfs/tree-log.c:3097
Code: 89 e6 bf fb ff ff ff e8 0c 02 6d fe 41 83 fc fb 0f 84 03 56 05 05 e8 8d 00 6d fe 44 89 e6 48 c7 c7 60 60 a5 88 e8 63 38 fd 04 <0f> 0b e8 77 00 6d fe 48 8b 7c 24 38 44 89 e1 ba 19 0c 00 00 48 c7
RSP: 0018:ffff8880396079f8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff814dff01 RDI: ffffed10072c0f31
RBP: ffff8880a1ec6e18 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff4
R13: ffff88809cfa6a58 R14: ffff8880aff046c0 R15: ffff8880ab27c400
btrfs_sync_file+0xbfb/0xd90 fs/btrfs/file.c:2243
vfs_fsync_range+0x13a/0x220 fs/sync.c:197
vfs_fsync fs/sync.c:211 [inline]
do_fsync fs/sync.c:221 [inline]
__do_sys_fsync fs/sync.c:229 [inline]
__se_sys_fsync fs/sync.c:227 [inline]
__x64_sys_fsync+0x6b/0xc0 fs/sync.c:227
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fee379330c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007fee35ea5168 EFLAGS: 00000246 ORIG_RAX: 000000000000004a
RAX: ffffffffffffffda RBX: 00007fee37a52f80 RCX: 00007fee379330c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007fee35ea51d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffe6b47d30f R14: 00007fee35ea5300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..


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