------------[ cut here ]------------
WARNING: CPU: 0 PID: 19817 at fs/udf/inode.c:2081 __udf_add_aext+0x51e/0x6d0 fs/udf/inode.c:2080
Modules linked in:
CPU: 0 PID: 19817 Comm: syz.7.3310 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__udf_add_aext+0x51e/0x6d0 fs/udf/inode.c:2080
Code: 08 4c 89 f7 e8 23 7a e3 fe 49 8b 3e 4c 89 e6 e8 88 86 02 ff 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 12 4b 8b fe <0f> 0b e9 1b fc ff ff e8 06 4b 8b fe 0f 0b e9 6f fd ff ff e8 fa 4a
RSP: 0018:ffffc9000455f200 EFLAGS: 00010283
RAX: ffffffff82fbd14e RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9001a302000 RSI: 0000000000019f7b RDI: 0000000000019f7c
RBP: 1ffff920008abec5 R08: ffff88802a973c00 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000001 R14: ffffc9000455f620 R15: ffffc9000455f628
FS:  00007fdd50caa6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000747000 CR3: 000000007b5a9000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 udf_add_aext fs/udf/inode.c:2138 [inline]
 udf_do_extend_file+0x90c/0x11d0 fs/udf/inode.c:588
 inode_getblk fs/udf/inode.c:840 [inline]
 udf_map_block+0x1029/0x42e0 fs/udf/inode.c:451
 __udf_get_block+0x53/0x250 fs/udf/inode.c:465
 __block_write_begin_int+0x57f/0x1af0 fs/buffer.c:2124
 __block_write_begin fs/buffer.c:2173 [inline]
 block_write_begin+0x9a/0x1e0 fs/buffer.c:2234
 udf_write_begin+0x1c0/0x420 fs/udf/inode.c:261
 generic_perform_write+0x2fe/0x5c0 mm/filemap.c:4031
 udf_file_write_iter+0x2b5/0x610 fs/udf/file.c:111
 do_iter_readv_writev fs/read_write.c:-1 [inline]
 do_iter_write+0x738/0xc30 fs/read_write.c:860
 vfs_writev fs/read_write.c:933 [inline]
 do_pwritev+0x241/0x3a0 fs/read_write.c:1030
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fdd4fd9c799
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:00007fdd50caa028 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007fdd50016090 RCX: 00007fdd4fd9c799
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000004
RBP: 00007fdd4fe32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000e7b R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdd50016128 R14: 00007fdd50016090 R15: 00007fff6e83a508
 </TASK>