------------[ cut here ]------------
WARNING: CPU: 0 PID: 5936 at block/bdev.c:643 blkdev_flush_mapping+0xac/0x290 block/bdev.c:643
Modules linked in:
CPU: 0 PID: 5936 Comm: syz.1.25 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:blkdev_flush_mapping+0xac/0x290 block/bdev.c:643
Code: 42 80 3c 28 00 74 08 4c 89 f7 e8 af d0 cd fd 49 8b 3e 48 ba ff ff ff ff ff ff ff 7f 31 f6 e8 cb 5d a3 fd eb 11 e8 24 4e 75 fd <0f> 0b 48 85 db 75 9f e8 18 4e 75 fd 48 89 1c 24 4c 8d b3 80 00 00
RSP: 0018:ffffc90004c17cb8 EFLAGS: 00010293
RAX: ffffffff8412235c RBX: ffff88802010d240 RCX: ffff88802eae0000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000002 R08: ffff88802010d27b R09: 1ffff11004021a4f
R10: dffffc0000000000 R11: ffffed1004021a50 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88802010d374 R15: ffff88802010d278
FS:  000055557ea29500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d916ff8 CR3: 0000000077838000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 blkdev_put_whole block/bdev.c:676 [inline]
 blkdev_put+0x49a/0x7a0 block/bdev.c:954
 blkdev_release+0x84/0x90 block/fops.c:604
 __fput+0x221/0x940 fs/file_table.c:418
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f30f899e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff9e58f238 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fff9e58f320 RCX: 00007f30f899e0d9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000016c33 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2c720000 R11: 0000000000000246 R12: 00007fff9e58f360
R13: 00007f30f8c25fac R14: 0000000000016cd3 R15: 00007f30f8c25fa0
 </TASK>