------------[ cut here ]------------
WARNING: CPU: 1 PID: 6915 at fs/buffer.c:1177 mark_buffer_dirty+0x2e5/0x520 fs/buffer.c:1177
Modules linked in:
CPU: 1 UID: 0 PID: 6915 Comm: syz.5.248 Not tainted 6.12.0-syzkaller-01518-ga5c93bfec0be #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:mark_buffer_dirty+0x2e5/0x520 fs/buffer.c:1177
Code: 89 df e8 6e ee da ff 48 8b 3b be 20 00 00 00 5b 41 5e 41 5f 5d e9 9b d7 fb ff e8 06 e4 70 ff e9 73 ff ff ff e8 fc e3 70 ff 90 <0f> 0b 90 e9 61 fd ff ff e8 ee e3 70 ff 90 0f 0b 90 e9 88 fd ff ff
RSP: 0018:ffffc90004817490 EFLAGS: 00010283
RAX: ffffffff8223fda4 RBX: ffff888011e79801 RCX: 0000000000040000
RDX: ffffc9000e7c3000 RSI: 000000000000030c RDI: 000000000000030d
RBP: 0000000000000000 R08: ffffffff8223fb01 R09: 1ffff1100f5ec75c
R10: dffffc0000000000 R11: ffffed100f5ec75d R12: 000000000000000d
R13: ffff888011e7980c R14: ffff88807af63ae0 R15: dffffc0000000000
FS:  00007f42d47096c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557d3f1808 CR3: 0000000070d4e000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 dirty_sb fs/sysv/sysv.h:117 [inline]
 sysv_new_block+0x607/0x970 fs/sysv/balloc.c:150
 alloc_branch fs/sysv/itree.c:135 [inline]
 get_block+0x30a/0x16d0 fs/sysv/itree.c:254
 __block_write_begin_int+0x50e/0x1a70 fs/buffer.c:2122
 block_write_begin+0x8f/0x120 fs/buffer.c:2232
 sysv_write_begin+0x31/0x70 fs/sysv/itree.c:490
 generic_perform_write+0x346/0x6d0 mm/filemap.c:4056
 generic_file_write_iter+0xae/0x310 mm/filemap.c:4183
 do_iter_readv_writev+0x602/0x880
 vfs_writev+0x376/0xba0 fs/read_write.c:1050
 do_pwritev fs/read_write.c:1146 [inline]
 __do_sys_pwritev fs/read_write.c:1192 [inline]
 __se_sys_pwritev fs/read_write.c:1187 [inline]
 __x64_sys_pwritev+0x1b7/0x2d0 fs/read_write.c:1187
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f42d397e759
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:00007f42d4709038 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 00007f42d3b36130 RCX: 00007f42d397e759
RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00007f42d39f175e R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000802006 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f42d3b36130 R15: 00007ffd07e90e58
 </TASK>