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BUG: KASAN: slab-out-of-bounds in hfs_asc2mac+0x467/0x9a0 fs/hfs/trans.c:133
Write of size 1 at addr ffff888027637f4e by task syz-executor.2/10874

CPU: 1 PID: 10874 Comm: syz-executor.2 Not tainted 6.1.0-rc8-syzkaller-00164-g4cee37b3a4e6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
 print_address_description+0x74/0x340 mm/kasan/report.c:284
 print_report+0x107/0x1f0 mm/kasan/report.c:395
 kasan_report+0xcd/0x100 mm/kasan/report.c:495
 hfs_asc2mac+0x467/0x9a0 fs/hfs/trans.c:133
 hfs_cat_build_key+0x92/0x170 fs/hfs/catalog.c:28
 hfs_lookup+0x1ab/0x2c0 fs/hfs/dir.c:31
 lookup_open fs/namei.c:3391 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x10e6/0x2df0 fs/namei.c:3711
 do_filp_open+0x264/0x4f0 fs/namei.c:3741
 do_sys_openat2+0x124/0x4e0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_open fs/open.c:1334 [inline]
 __se_sys_open fs/open.c:1330 [inline]
 __x64_sys_open+0x221/0x270 fs/open.c:1330
 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: 0033:0x7f42c388c0d9
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
RSP: 002b:00007f42c45c0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f42c39ac050 RCX: 00007f42c388c0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f42c38e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe44c4e38f R14: 00007f42c45c0300 R15: 0000000000022000
 </TASK>

Allocated by task 10874:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x3d/0x60 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:371 [inline]
 __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:955 [inline]
 __kmalloc+0xaf/0x1a0 mm/slab_common.c:968
 kmalloc include/linux/slab.h:558 [inline]
 hfs_find_init+0x8b/0x1e0 fs/hfs/bfind.c:21
 hfs_lookup+0x105/0x2c0 fs/hfs/dir.c:28
 lookup_open fs/namei.c:3391 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x10e6/0x2df0 fs/namei.c:3711
 do_filp_open+0x264/0x4f0 fs/namei.c:3741
 do_sys_openat2+0x124/0x4e0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_open fs/open.c:1334 [inline]
 __se_sys_open fs/open.c:1330 [inline]
 __x64_sys_open+0x221/0x270 fs/open.c:1330
 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

The buggy address belongs to the object at ffff888027637f00
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 78 bytes inside of
 96-byte region [ffff888027637f00, ffff888027637f60)

The buggy address belongs to the physical page:
page:ffffea00009d8dc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x27637
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea00016e2b00 dead000000000005 ffff888012841780
raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 5778, tgid 5777 (syz-executor.3), ts 255882683875, free_ts 255874021806
 prep_new_page mm/page_alloc.c:2539 [inline]
 get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4291
 __alloc_pages+0x259/0x560 mm/page_alloc.c:5558
 __alloc_pages_node include/linux/gfp.h:237 [inline]
 alloc_slab_page+0x61/0x190 mm/slub.c:1796
 allocate_slab+0x5e/0x4b0 mm/slub.c:1939
 new_slab mm/slub.c:1992 [inline]
 ___slab_alloc+0x782/0xe20 mm/slub.c:3180
 __slab_alloc mm/slub.c:3279 [inline]
 slab_alloc_node mm/slub.c:3364 [inline]
 __kmem_cache_alloc_node+0x252/0x310 mm/slub.c:3437
 __do_kmalloc_node mm/slab_common.c:954 [inline]
 __kmalloc_node+0x9e/0x190 mm/slab_common.c:962
 kmalloc_array_node include/linux/slab.h:666 [inline]
 kcalloc_node include/linux/slab.h:671 [inline]
 memcg_alloc_slab_cgroups+0x7c/0x120 mm/memcontrol.c:2885
 account_slab mm/slab.h:635 [inline]
 allocate_slab+0x9b/0x4b0 mm/slub.c:1957
 new_slab mm/slub.c:1992 [inline]
 ___slab_alloc+0x782/0xe20 mm/slub.c:3180
 kmem_cache_alloc_bulk+0x1e1/0x570 mm/slub.c:3830
 __io_alloc_req_refill+0x242/0x48f io_uring/io_uring.c:935
 io_alloc_req_refill io_uring/io_uring.h:354 [inline]
 io_submit_sqes+0xc8e/0x1b90 io_uring/io_uring.c:2272
 __do_sys_io_uring_enter io_uring/io_uring.c:3222 [inline]
 __se_sys_io_uring_enter+0x327/0x22e0 io_uring/io_uring.c:3154
 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
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1459 [inline]
 free_pcp_prepare+0x80c/0x8f0 mm/page_alloc.c:1509
 free_unref_page_prepare mm/page_alloc.c:3387 [inline]
 free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3483
 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slab.h:737 [inline]
 kmem_cache_alloc_bulk+0x42d/0x570 mm/slub.c:3854
 __io_alloc_req_refill+0x242/0x48f io_uring/io_uring.c:935
 io_alloc_req_refill io_uring/io_uring.h:354 [inline]
 io_submit_sqes+0xc8e/0x1b90 io_uring/io_uring.c:2272
 __do_sys_io_uring_enter io_uring/io_uring.c:3222 [inline]
 __se_sys_io_uring_enter+0x327/0x22e0 io_uring/io_uring.c:3154
 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

Memory state around the buggy address:
 ffff888027637e00: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
 ffff888027637e80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff888027637f00: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc
                                              ^
 ffff888027637f80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff888027638000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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