==================================================================
BUG: KASAN: slab-out-of-bounds in hfs_asc2mac+0x62a/0x680 fs/hfs/trans.c:133
Write of size 1 at addr ffff8880b0a22c4e by task syz-executor.4/10381

CPU: 0 PID: 10381 Comm: syz-executor.4 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_store1_noabort+0x68/0x70 mm/kasan/report.c:432
 hfs_asc2mac+0x62a/0x680 fs/hfs/trans.c:133
 hfs_cat_build_key+0xbe/0x1a0 fs/hfs/catalog.c:28
 hfs_lookup+0x18c/0x2b0 fs/hfs/dir.c:31
 lookup_real fs/namei.c:1555 [inline]
 __lookup_hash fs/namei.c:1575 [inline]
 __lookup_hash+0x1bb/0x270 fs/namei.c:1563
 filename_create+0x156/0x3f0 fs/namei.c:3677
 user_path_create fs/namei.c:3734 [inline]
 SYSC_mkdirat fs/namei.c:3866 [inline]
 SyS_mkdirat+0x95/0x270 fs/namei.c:3858
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f9884dc50a9
RSP: 002b:00007f9883337168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f9884ee4f80 RCX: 00007f9884dc50a9
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 00007f9884e20ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe3f1cb9df R14: 00007f9883337300 R15: 0000000000022000

Allocated by task 10381:
 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]
 hfs_find_init+0x91/0x220 fs/hfs/bfind.c:21
 hfs_lookup+0xea/0x2b0 fs/hfs/dir.c:28
 lookup_real fs/namei.c:1555 [inline]
 __lookup_hash fs/namei.c:1575 [inline]
 __lookup_hash+0x1bb/0x270 fs/namei.c:1563
 filename_create+0x156/0x3f0 fs/namei.c:3677
 user_path_create fs/namei.c:3734 [inline]
 SYSC_mkdirat fs/namei.c:3866 [inline]
 SyS_mkdirat+0x95/0x270 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 7:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xc9/0x250 mm/slab.c:3815
 __dst_destroy_metrics_generic+0x3e/0x50 net/core/dst.c:245
 dst_destroy_metrics_generic include/net/dst.h:136 [inline]
 ip6_dst_destroy+0x2b9/0x390 net/ipv6/route.c:400
 dst_destroy+0xc0/0x390 net/core/dst.c:129
 __rcu_reclaim kernel/rcu/rcu.h:195 [inline]
 rcu_do_batch kernel/rcu/tree.c:2699 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline]
 rcu_process_callbacks+0x780/0x1180 kernel/rcu/tree.c:2946
 __do_softirq+0x24d/0x9ff kernel/softirq.c:288

The buggy address belongs to the object at ffff8880b0a22c00
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 78 bytes inside of
 96-byte region [ffff8880b0a22c00, ffff8880b0a22c60)
The buggy address belongs to the page:
page:ffffea0002c28880 count:1 mapcount:0 mapping:ffff8880b0a22000 index:0x0
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffff8880b0a22000 0000000000000000 0000000100000020
raw: ffffea000256baa0 ffffea0002b01620 ffff88813fe744c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880b0a22b00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8880b0a22b80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
>ffff8880b0a22c00: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc
                                              ^
 ffff8880b0a22c80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8880b0a22d00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
==================================================================
audit: type=1800 audit(1672195361.018:19): pid=10387 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="loop5" ino=22 res=0
audit: type=1800 audit(1672195361.248:20): pid=10412 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="loop5" ino=23 res=0
audit: type=1800 audit(1672195361.348:21): pid=10398 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.3" name="memory.events" dev="sda1" ino=14030 res=0