UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: warning (device loop2): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
==================================================================
BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x6e3/0x7d0 fs/udf/inode.c:2076
Write of size 4 at addr ffff8880456a6930 by task syz-executor.2/11244

CPU: 1 PID: 11244 Comm: syz-executor.2 Not tainted 4.14.302-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_store_n_noabort+0x6b/0x80 mm/kasan/report.c:446
 udf_write_aext+0x6e3/0x7d0 fs/udf/inode.c:2076
 udf_add_entry+0xc54/0x2710 fs/udf/namei.c:501
 udf_mkdir+0x122/0x620 fs/udf/namei.c:699
 vfs_mkdir+0x463/0x6e0 fs/namei.c:3851
 SYSC_mkdirat fs/namei.c:3874 [inline]
 SyS_mkdirat+0x1fd/0x270 fs/namei.c:3858
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f01ebb730a9
RSP: 002b:00007f01ea0e5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f01ebc92f80 RCX: 00007f01ebb730a9
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000004
RBP: 00007f01ebbceae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcc998e4bf R14: 00007f01ea0e5300 R15: 0000000000022000

Allocated by task 11244:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x15a/0x400 mm/slab.c:3729
 kmalloc include/linux/slab.h:493 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 udf_new_inode+0x98d/0xce0 fs/udf/ialloc.c:70
 udf_mkdir+0x95/0x620 fs/udf/namei.c:692
 vfs_mkdir+0x463/0x6e0 fs/namei.c:3851
 SYSC_mkdirat fs/namei.c:3874 [inline]
 SyS_mkdirat+0x1fd/0x270 fs/namei.c:3858
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8880456a6940
 which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 16 bytes to the left of
 4096-byte region [ffff8880456a6940, ffff8880456a7940)
The buggy address belongs to the page:
page:ffffea000115a980 count:1 mapcount:0 mapping:ffff8880456a6940 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff8880456a6940 0000000000000000 0000000100000001
raw: ffffea0002476a20 ffffea0002ce8720 ffff88813fe74dc0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880456a6800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880456a6880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880456a6900: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
                                     ^
 ffff8880456a6980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880456a6a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================