syzbot

UDF-fs: error (device nbd4): udf_read_tagged: read failed, block=256, location=256
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WARNING: CPU: 1 PID: 9029 at fs/buffer.c:1125 __getblk_slow+0x4cc/0x560 fs/buffer.c:1125
Modules linked in:
CPU: 1 UID: 0 PID: 9029 Comm: syz.4.724 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__getblk_slow+0x4cc/0x560 fs/buffer.c:1125
Code: a0 8b 48 89 df e8 24 bc ba ff 90 0f 0b e8 ec 95 71 ff 48 c7 c6 60 a8 a0 8b 48 89 df e8 0d bc ba ff 90 0f 0b e8 d5 95 71 ff 90 <0f> 0b 90 8b 74 24 0c 89 ea 48 c7 c7 c0 a9 a0 8b 31 db e8 bd e9 4f
RSP: 0018:ffffc9000ce0f7e0 EFLAGS: 00010283
RAX: 000000000000867c RBX: 0000000000000200 RCX: ffffc900102ba000
RDX: 0000000000080000 RSI: ffffffff824b656b RDI: 0000000000000005
RBP: 0000000000000400 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000200 R11: 0000000000000001 R12: ffff888148e28000
R13: 0000000000000200 R14: 0000000000000200 R15: ffff888148e28000
FS:  00007f6fe33b16c0(0000) GS:ffff888124b09000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc675479000 CR3: 000000005911b000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 bdev_getblk+0xd4/0xe0 fs/buffer.c:1461
 __bread_gfp+0x86/0x3c0 fs/buffer.c:1515
 sb_bread include/linux/buffer_head.h:346 [inline]
 udf_read_tagged+0xae/0x740 fs/udf/misc.c:199
 udf_check_anchor_block+0x89/0x4b0 fs/udf/super.c:1912
 udf_scan_anchors fs/udf/super.c:1990 [inline]
 udf_load_vrs+0x682/0x1070 fs/udf/super.c:2033
 udf_fill_super+0x791/0x1df0 fs/udf/super.c:2201
 get_tree_bdev_flags+0x38c/0x620 fs/super.c:1691
 vfs_get_tree+0x8e/0x340 fs/super.c:1751
 fc_mount fs/namespace.c:1208 [inline]
 do_new_mount_fc fs/namespace.c:3651 [inline]
 do_new_mount fs/namespace.c:3727 [inline]
 path_mount+0x7b9/0x23a0 fs/namespace.c:4037
 do_mount fs/namespace.c:4050 [inline]
 __do_sys_mount fs/namespace.c:4238 [inline]
 __se_sys_mount fs/namespace.c:4215 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:4215
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6fe258efc9
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:00007f6fe33b1038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6fe27e6180 RCX: 00007f6fe258efc9
RDX: 0000200000000080 RSI: 0000200000004a00 RDI: 0000200000000000
RBP: 00007f6fe2611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000002008087 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6fe27e6218 R14: 00007f6fe27e6180 R15: 00007ffd596d7368
 </TASK>