------------[ cut here ]------------
WARNING: CPU: 0 PID: 4381 at fs/udf/inode.c:1928 __udf_add_aext+0x532/0x6c0 fs/udf/inode.c:1927
Modules linked in:
CPU: 0 PID: 4381 Comm: syz.2.3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__udf_add_aext+0x532/0x6c0 fs/udf/inode.c:1927
Code: c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c6 1d 99 fe 0f 0b e9 1b fc ff ff e8 ba 1d 99 fe 0f 0b e9 6f fd ff ff e8 ae 1d 99 fe <0f> 0b e9 5b fd ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 02 fb
RSP: 0018:ffffc900041972a0 EFLAGS: 00010287
RAX: ffffffff82e957a2 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc900100a7000 RSI: 0000000000016d98 RDI: 0000000000016d99
RBP: 0000000000000120 R08: ffff88807cbc8000 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000002 R12: 00000000000000d8
R13: 0000000000000008 R14: ffffc900041976a0 R15: ffffffffffffff40
FS:  00007f07e64626c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fd0fff8 CR3: 0000000026f8b000 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_do_extend_file+0x6fb/0x10b0 fs/udf/inode.c:450
 inode_getblk fs/udf/inode.c:686 [inline]
 udf_get_block+0xeda/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
 do_iter_readv_writev fs/read_write.c:-1 [inline]
 do_iter_write+0x642/0xb10 fs/read_write.c:861
 vfs_writev fs/read_write.c:934 [inline]
 do_pwritev+0x23d/0x3a0 fs/read_write.c:1031
 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: 0033:0x7f07e559cdd9
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:00007f07e6462028 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f07e5816090 RCX: 00007f07e559cdd9
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000006
RBP: 00007f07e5632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000e7b R11: 0000000000000246 R12: 0000000000000000
R13: 00007f07e5816128 R14: 00007f07e5816090 R15: 00007fff85257278
 </TASK>