------------[ cut here ]------------
WARNING: CPU: 0 PID: 4292 at fs/buffer.c:1081 mark_buffer_dirty+0x394/0x7d0
Modules linked in:
CPU: 0 PID: 4292 Comm: syz.1.72 Not tainted 6.1.113-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:mark_buffer_dirty+0x394/0x7d0 fs/buffer.c:1081
Code: d3 e0 ff 48 8b 7d 00 be 04 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 0b 6a fc ff e8 06 52 89 ff e9 42 ff ff ff e8 fc 51 89 ff <0f> 0b e9 b3 fc ff ff e8 f0 51 89 ff 0f 0b e9 f6 fc ff ff e8 e4 51
RSP: 0018:ffffc9000a9e76e8 EFLAGS: 00010287
RAX: ffffffff820140c4 RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffffc9000bc99000 RSI: 000000000000c0f5 RDI: 000000000000c0f6
RBP: 0000000000000000 R08: ffffffff82013d71 R09: ffffed100e3a9caf
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880564aa678 R15: ffff888071d4e570
FS:  00007ff66d80d6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002085b000 CR3: 00000000567fe000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sysv_free_block+0x451/0x960 fs/sysv/balloc.c:87
 free_data fs/sysv/itree.c:334 [inline]
 free_branches+0xf9/0x480 fs/sysv/itree.c:363
 sysv_truncate+0xa37/0x1050 fs/sysv/itree.c:407
 sysv_write_begin+0x5c/0x60 fs/sysv/itree.c:489
 generic_perform_write+0x2fc/0x5e0 mm/filemap.c:3845
 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3973
 generic_file_write_iter+0xab/0x310 mm/filemap.c:4005
 do_iter_write+0x6e6/0xc40 fs/read_write.c:861
 vfs_writev fs/read_write.c:934 [inline]
 do_pwritev+0x216/0x360 fs/read_write.c:1031
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff66c97dff9
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:00007ff66d80d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 00007ff66cb36130 RCX: 00007ff66c97dff9
RDX: 0000000000000001 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00007ff66c9f0296 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000802000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007ff66cb36130 R15: 00007fffc75fccc8
 </TASK>