loop3: detected capacity change from 0 to 64
x_tables: duplicate underflow at hook 1
------------[ cut here ]------------
WARNING: fs/buffer.c:1183 at mark_buffer_dirty+0x299/0x400 fs/buffer.c:1183, CPU#0: syz.3.2694/17378
Modules linked in:
CPU: 0 UID: 0 PID: 17378 Comm: syz.3.2694 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:mark_buffer_dirty+0x299/0x400 fs/buffer.c:1183
Code: 4c 89 f7 e8 e9 c2 db ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 24 a2 fb ff e8 ff 5f 75 ff eb 8c e8 f8 5f 75 ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 ea 5f 75 ff 90 0f 0b 90 e9 cf fd ff ff
RSP: 0000:ffffc9000dbd7468 EFLAGS: 00010283
RAX: ffffffff824c5758 RBX: ffff888058fb4d98 RCX: 0000000000080000
RDX: ffffc9001337c000 RSI: 0000000000003348 RDI: 0000000000003349
RBP: ffff88807beaa001 R08: ffff888058fb4d9f R09: 1ffff1100b1f69b3
R10: dffffc0000000000 R11: ffffed100b1f69b4 R12: ffff88806b15d600
R13: ffff888031992570 R14: ffff888058fb4d98 R15: 000000000000000a
FS:  00007ff17fff66c0(0000) GS:ffff888125e31000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe962ceff8 CR3: 000000007af04000 CR4: 00000000003526f0
DR0: 0000000000000008 DR1: 0000000000000002 DR2: 0000000000000404
DR3: ffffffffefffff14 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bfs_move_block fs/bfs/file.c:44 [inline]
 bfs_move_blocks fs/bfs/file.c:57 [inline]
 bfs_get_block+0x5da/0xae0 fs/bfs/file.c:126
 __block_write_begin_int+0x6b5/0x1900 fs/buffer.c:2145
 block_write_begin+0x8d/0x120 fs/buffer.c:2256
 bfs_write_begin+0x35/0xd0 fs/bfs/file.c:180
 generic_perform_write+0x2c5/0x900 mm/filemap.c:4314
 generic_file_write_iter+0x117/0x550 mm/filemap.c:4457
 do_iter_readv_writev+0x623/0x8c0 fs/read_write.c:-1
 vfs_writev+0x31a/0x960 fs/read_write.c:1057
 do_pwritev fs/read_write.c:1153 [inline]
 __do_sys_pwritev2 fs/read_write.c:1211 [inline]
 __se_sys_pwritev2+0x179/0x290 fs/read_write.c:1202
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff181d8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff17fff6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007ff181fe5fa0 RCX: 00007ff181d8f749
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000006
RBP: 00007ff181e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000e7b R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff181fe6038 R14: 00007ff181fe5fa0 R15: 00007ffd6418ae38
 </TASK>