================================================================== BUG: KASAN: slab-out-of-bounds in hfs_asc2mac+0x68f/0x710 fs/hfs/trans.c:133 Write of size 1 at addr ffff8880afc1674e by task syz-executor.4/14484 CPU: 0 PID: 14484 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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 mm/kasan/report.c:412 [inline] __asan_report_store1_noabort+0x88/0x90 mm/kasan/report.c:435 hfs_asc2mac+0x68f/0x710 fs/hfs/trans.c:133 hfs_cat_build_key+0xbe/0x1a0 fs/hfs/catalog.c:28 hfs_lookup+0x1c2/0x300 fs/hfs/dir.c:31 lookup_open+0x698/0x1a20 fs/namei.c:3214 do_last fs/namei.c:3327 [inline] path_openat+0x1804/0x2df0 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 RIP: 0033:0x7feeef6340c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. RSP: 002b:00007feeedba6168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007feeef753f80 RCX: 00007feeef6340c9 RDX: 0000000000010001 RSI: 0000000020000300 RDI: ffffffffffffff9c RBP: 00007feeef68fae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000060 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe9b6374ef R14: 00007feeedba6300 R15: 0000000000022000 Allocated by task 14484: __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] hfs_find_init+0x91/0x230 fs/hfs/bfind.c:21 hfs_lookup+0xfe/0x300 fs/hfs/dir.c:28 lookup_open+0x698/0x1a20 fs/namei.c:3214 do_last fs/namei.c:3327 [inline] path_openat+0x1804/0x2df0 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 Freed by task 4697: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 aa_free_file_ctx security/apparmor/include/file.h:76 [inline] apparmor_file_free_security+0x9a/0xd0 security/apparmor/lsm.c:448 security_file_free+0x3e/0x70 security/security.c:885 file_free fs/file_table.c:54 [inline] __fput+0x42a/0x890 fs/file_table.c:294 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880afc16700 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 78 bytes inside of 96-byte region [ffff8880afc16700, ffff8880afc16760) The buggy address belongs to the page: page:ffffea0002bf0580 count:1 mapcount:0 mapping:ffff88813bff04c0 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea0002ca41c8 ffffea0002ceed48 ffff88813bff04c0 raw: 0000000000000000 ffff8880afc16000 0000000100000020 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880afc16600: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff8880afc16680: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff8880afc16700: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc ^ ffff8880afc16780: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff8880afc16800: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ================================================================== overlayfs: failed to resolve './bus': -2