------------[ cut here ]------------
WARNING: CPU: 0 PID: 4493 at fs/udf/inode.c:1932 __udf_add_aext+0x51a/0x6c0 fs/udf/inode.c:1931
Modules linked in:
CPU: 0 PID: 4493 Comm: syz.4.33 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__udf_add_aext+0x51a/0x6c0 fs/udf/inode.c:1931
Code: 08 4c 89 f7 e8 17 2c ea fe 49 8b 3e 4c 89 e6 e8 4c b4 07 ff 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 f6 40 99 fe <0f> 0b e9 1b fc ff ff e8 ea 40 99 fe 0f 0b e9 6f fd ff ff e8 de 40
RSP: 0018:ffffc90004d7f2c0 EFLAGS: 00010283
RAX: ffffffff82e931ba RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9000fcfc000 RSI: 0000000000006f2e RDI: 0000000000006f2f
RBP: 1ffff920009afe8f R08: ffff88802d5dbb80 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000003 R14: ffffc90004d7f470 R15: ffffc90004d7f478
FS:  00007fe66439f6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe6635e9e80 CR3: 000000004dc92000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_add_aext fs/udf/inode.c:1989 [inline]
 udf_insert_aext fs/udf/inode.c:2163 [inline]
 udf_update_extents fs/udf/inode.c:1060 [inline]
 inode_getblk fs/udf/inode.c:776 [inline]
 udf_get_block+0x3047/0x4130 fs/udf/inode.c:359
 __block_write_begin_int+0x55d/0x1a80 fs/buffer.c:1991
 __block_write_begin fs/buffer.c:2041 [inline]
 block_write_begin+0x96/0x1e0 fs/buffer.c:2102
 udf_write_begin+0x31/0x70 fs/udf/inode.c:212
 generic_perform_write+0x2fa/0x5c0 mm/filemap.c:3862
 __generic_file_write_iter+0x148/0x2a0 mm/filemap.c:3960
 udf_file_write_iter+0x289/0x620 fs/udf/file.c:164
 call_write_iter include/linux/fs.h:2265 [inline]
 aio_write+0x545/0x780 fs/aio.c:1615
 __io_submit_one fs/aio.c:-1 [inline]
 io_submit_one+0x6cd/0x1380 fs/aio.c:2034
 __do_sys_io_submit fs/aio.c:2093 [inline]
 __se_sys_io_submit+0x19d/0x310 fs/aio.c:2063
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe66359c799
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:00007fe66439f028 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007fe663816090 RCX: 00007fe66359c799
RDX: 0000200000000540 RSI: 0000000000000001 RDI: 00007fe6643a0000
RBP: 00007fe663632bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe663816128 R14: 00007fe663816090 R15: 00007ffca37cab28
 </TASK>