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BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:377 [inline]
BUG: KASAN: slab-out-of-bounds in udf_find_entry+0xa33/0x1070 fs/udf/namei.c:251
Write of size 165 at addr ffff8880b3d669da by task syz-executor416/14271

CPU: 0 PID: 14271 Comm: syz-executor416 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report+0x8f/0xa0 mm/kasan/report.c:412
 memcpy+0x35/0x50 mm/kasan/kasan.c:303
 memcpy include/linux/string.h:377 [inline]
 udf_find_entry+0xa33/0x1070 fs/udf/namei.c:251
 udf_lookup fs/udf/namei.c:322 [inline]
 udf_lookup+0x156/0x270 fs/udf/namei.c:296
 __lookup_slow+0x246/0x4a0 fs/namei.c:1672
 lookup_slow fs/namei.c:1689 [inline]
 walk_component+0x7ac/0xda0 fs/namei.c:1811
 link_path_walk.part.0+0x901/0x1230 fs/namei.c:2142
 link_path_walk fs/namei.c:2073 [inline]
 path_openat+0x1db/0x2df0 fs/namei.c:3536
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f0552d85999
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0552d2e208 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f0552e0b4c8 RCX: 00007f0552d85999
RDX: 000000000000275a RSI: 0000000020000140 RDI: 00000000ffffff9c
RBP: 00007f0552e0b4c0 R08: 00007f0552e0b4c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0552e0b4cc
R13: 00007ffc8846fc1f R14: 00007f0552d2e300 R15: 0000000000022000

Allocated by task 14271:
 kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625
 kmalloc include/linux/slab.h:515 [inline]
 udf_find_entry+0xa82/0x1070 fs/udf/namei.c:241
 udf_lookup fs/udf/namei.c:322 [inline]
 udf_lookup+0x156/0x270 fs/udf/namei.c:296
 __lookup_slow+0x246/0x4a0 fs/namei.c:1672
 lookup_slow fs/namei.c:1689 [inline]
 walk_component+0x7ac/0xda0 fs/namei.c:1811
 link_path_walk.part.0+0x901/0x1230 fs/namei.c:2142
 link_path_walk fs/namei.c:2073 [inline]
 path_openat+0x1db/0x2df0 fs/namei.c:3536
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 13793:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 udf_add_entry+0x38a/0x2a20 fs/udf/namei.c:578
 udf_add_nondir+0xf9/0x400 fs/udf/namei.c:602
 udf_create+0x130/0x180 fs/udf/namei.c:639
 lookup_open+0x893/0x1a20 fs/namei.c:3235
 do_last fs/namei.c:3327 [inline]
 path_openat+0x1094/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8880b3d66980
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 90 bytes inside of
 256-byte region [ffff8880b3d66980, ffff8880b3d66a80)
The buggy address belongs to the page:
page:ffffea0002cf5980 count:1 mapcount:0 mapping:ffff88813bff07c0 index:0x0
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002d08588 ffffea0002cf1588 ffff88813bff07c0
raw: 0000000000000000 ffff8880b3d660c0 000000010000000c 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880b3d66900: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8880b3d66980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880b3d66a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 06
                                                                ^
 ffff8880b3d66a80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8880b3d66b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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