================================================================== 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 ==================================================================