loop0: detected capacity change from 0 to 2048
==================================================================
BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x6e6/0x7e0 fs/udf/inode.c:2103
Write of size 4 at addr ffff88801d9b47f8 by task syz-executor184/3613

CPU: 1 PID: 3613 Comm: syz-executor184 Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
 print_address_description+0x65/0x4b0 mm/kasan/report.c:317
 print_report+0x108/0x1f0 mm/kasan/report.c:433
 kasan_report+0xc3/0xf0 mm/kasan/report.c:495
 udf_write_aext+0x6e6/0x7e0 fs/udf/inode.c:2103
 udf_add_entry+0x1712/0x3300 fs/udf/namei.c:482
 udf_mkdir+0x13c/0x980 fs/udf/namei.c:681
 vfs_mkdir+0x3b3/0x590 fs/namei.c:4013
 do_mkdirat+0x279/0x550 fs/namei.c:4038
 __do_sys_mkdir fs/namei.c:4058 [inline]
 __se_sys_mkdir fs/namei.c:4056 [inline]
 __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4056
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f0c37908479
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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe0b43bac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0c37908479
RDX: 00007f0c378c66e3 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f0c378c79b0 R08: 00007ffe0b43b9b0 R09: 0000000000000000
R10: 00007ffe0b43b990 R11: 0000000000000246 R12: 00007f0c378c7a40
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 ____kasan_kmalloc+0xcd/0x100 mm/kasan/common.c:516
 kasan_kmalloc include/linux/kasan.h:234 [inline]
 kmem_cache_alloc_trace+0x97/0x310 mm/slub.c:3289
 kmalloc include/linux/slab.h:600 [inline]
 kzalloc include/linux/slab.h:733 [inline]
 device_private_init drivers/base/core.c:3361 [inline]
 device_add+0xb6/0xf90 drivers/base/core.c:3411
 tty_register_device_attr+0x413/0x940 drivers/tty/tty_io.c:3245
 tty_register_device drivers/tty/tty_io.c:3180 [inline]
 tty_register_driver+0x5e5/0xc20 drivers/tty/tty_io.c:3444
 legacy_pty_init+0x3ac/0x5fb drivers/tty/pty.c:579
 pty_init+0xa/0x12 drivers/tty/pty.c:943
 do_one_initcall+0x1c9/0x400 init/main.c:1296
 do_initcall_level+0x168/0x218 init/main.c:1369
 do_initcalls+0x4b/0x8c init/main.c:1385
 kernel_init_freeable+0x3f1/0x57b init/main.c:1623
 kernel_init+0x19/0x2b0 init/main.c:1512
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

The buggy address belongs to the object at ffff88801d9b4400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 504 bytes to the right of
 512-byte region [ffff88801d9b4400, ffff88801d9b4600)

The buggy address belongs to the physical page:
page:ffffea0000766d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1d9b4
head:ffffea0000766d00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888012041c80
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 5725464547, free_ts 0
 prep_new_page mm/page_alloc.c:2532 [inline]
 get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283
 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549
 alloc_page_interleave+0x22/0x1c0 mm/mempolicy.c:2103
 alloc_slab_page+0x70/0xf0 mm/slub.c:1829
 allocate_slab+0x5e/0x520 mm/slub.c:1974
 new_slab mm/slub.c:2034 [inline]
 ___slab_alloc+0x3ee/0xc40 mm/slub.c:3036
 __slab_alloc mm/slub.c:3123 [inline]
 slab_alloc_node mm/slub.c:3214 [inline]
 slab_alloc mm/slub.c:3256 [inline]
 kmem_cache_alloc_trace+0x25f/0x310 mm/slub.c:3287
 kmalloc include/linux/slab.h:600 [inline]
 kzalloc include/linux/slab.h:733 [inline]
 device_private_init drivers/base/core.c:3361 [inline]
 device_add+0xb6/0xf90 drivers/base/core.c:3411
 tty_register_device_attr+0x413/0x940 drivers/tty/tty_io.c:3245
 tty_register_device drivers/tty/tty_io.c:3180 [inline]
 tty_register_driver+0x5e5/0xc20 drivers/tty/tty_io.c:3444
 legacy_pty_init+0x3ac/0x5fb drivers/tty/pty.c:579
 pty_init+0xa/0x12 drivers/tty/pty.c:943
 do_one_initcall+0x1c9/0x400 init/main.c:1296
 do_initcall_level+0x168/0x218 init/main.c:1369
 do_initcalls+0x4b/0x8c init/main.c:1385
 kernel_init_freeable+0x3f1/0x57b init/main.c:1623
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88801d9b4680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88801d9b4700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88801d9b4780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                                ^
 ffff88801d9b4800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88801d9b4880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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