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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 ffff888041d5574e by task syz-executor.4/23368

CPU: 0 PID: 23368 Comm: syz-executor.4 Not tainted 6.1.0-rc8-syzkaller-00003-gbce9332220bd #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_slow+0x266/0x3a0 fs/namei.c:1685
 lookup_slow+0x53/0x70 fs/namei.c:1702
 walk_component+0x2e1/0x410 fs/namei.c:1993
 lookup_last fs/namei.c:2450 [inline]
 path_lookupat+0x17d/0x450 fs/namei.c:2474
 filename_lookup+0x274/0x650 fs/namei.c:2503
 user_path_at_empty+0x40/0x1a0 fs/namei.c:2876
 user_path_at include/linux/namei.h:57 [inline]
 __do_sys_open_tree fs/namespace.c:2537 [inline]
 __se_sys_open_tree+0x1fa/0x8c0 fs/namespace.c:2504
 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: 0033:0x7fb72148c0d9
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:00007fb72223b168 EFLAGS: 00000246 ORIG_RAX: 00000000000001ac
RAX: ffffffffffffffda RBX: 00007fb7215abf80 RCX: 00007fb72148c0d9
RDX: 0000000000080901 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007fb7214e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe50909dbf R14: 00007fb72223b300 R15: 0000000000022000
 </TASK>

Allocated by task 23368:
 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_slow+0x266/0x3a0 fs/namei.c:1685
 lookup_slow+0x53/0x70 fs/namei.c:1702
 walk_component+0x2e1/0x410 fs/namei.c:1993
 lookup_last fs/namei.c:2450 [inline]
 path_lookupat+0x17d/0x450 fs/namei.c:2474
 filename_lookup+0x274/0x650 fs/namei.c:2503
 user_path_at_empty+0x40/0x1a0 fs/namei.c:2876
 user_path_at include/linux/namei.h:57 [inline]
 __do_sys_open_tree fs/namespace.c:2537 [inline]
 __se_sys_open_tree+0x1fa/0x8c0 fs/namespace.c:2504
 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

Last potentially related work creation:
 kasan_save_stack+0x2b/0x50 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:481
 kvfree_call_rcu+0x112/0x880 kernel/rcu/tree.c:3343
 cfg80211_update_known_bss+0x16a/0x9e0
 cfg80211_bss_update+0x175/0x20b0 net/wireless/scan.c:1730
 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2499 [inline]
 cfg80211_inform_bss_frame_data+0x97b/0x2230 net/wireless/scan.c:2532
 ieee80211_bss_info_update+0x7e9/0x1060 net/mac80211/scan.c:190
 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x1907/0x2c00 net/mac80211/ibss.c:1638
 ieee80211_iface_process_skb net/mac80211/iface.c:1630 [inline]
 ieee80211_iface_work+0x773/0xcf0 net/mac80211/iface.c:1684
 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Second to last potentially related work creation:
 kasan_save_stack+0x2b/0x50 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:481
 kvfree_call_rcu+0x112/0x880 kernel/rcu/tree.c:3343
 cfg80211_update_known_bss+0x16a/0x9e0
 cfg80211_bss_update+0x175/0x20b0 net/wireless/scan.c:1730
 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2499 [inline]
 cfg80211_inform_bss_frame_data+0x97b/0x2230 net/wireless/scan.c:2532
 ieee80211_bss_info_update+0x7e9/0x1060 net/mac80211/scan.c:190
 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x1907/0x2c00 net/mac80211/ibss.c:1638
 ieee80211_iface_process_skb net/mac80211/iface.c:1630 [inline]
 ieee80211_iface_work+0x773/0xcf0 net/mac80211/iface.c:1684
 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

The buggy address belongs to the object at ffff888041d55700
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 78 bytes inside of
 96-byte region [ffff888041d55700, ffff888041d55760)

The buggy address belongs to the physical page:
page:ffffea0001075540 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x41d55
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea000129eac0 dead000000000006 ffff888012841780
raw: 0000000000000000 0000000000200020 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 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 24, tgid 24 (kworker/1:1), ts 165052896327, free_ts 165042266253
 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_slab_page+0xbd/0x190 mm/slub.c:1794
 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
 kmalloc_trace+0x26/0x60 mm/slab_common.c:1045
 kmalloc include/linux/slab.h:553 [inline]
 dst_cow_metrics_generic+0x52/0x1c0 net/core/dst.c:199
 dst_metrics_write_ptr include/net/dst.h:119 [inline]
 dst_metric_set include/net/dst.h:180 [inline]
 icmp6_dst_alloc+0x30c/0x4d0 net/ipv6/route.c:3274
 mld_sendpack+0x649/0xd80 net/ipv6/mcast.c:1809
 ipv6_mc_dad_complete+0x81/0x390 net/ipv6/mcast.c:2247
 addrconf_dad_completed+0x65a/0xc70 net/ipv6/addrconf.c:4228
 addrconf_dad_work+0xd61/0x16a0
 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
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
 free_slab mm/slub.c:2031 [inline]
 discard_slab mm/slub.c:2037 [inline]
 __unfreeze_partials+0x1ab/0x200 mm/slub.c:2586
 put_cpu_partial+0x106/0x170 mm/slub.c:2662
 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]
 slab_alloc_node mm/slub.c:3398 [inline]
 kmem_cache_alloc_node+0x1ca/0x340 mm/slub.c:3443
 __alloc_skb+0xcf/0x2b0 net/core/skbuff.c:497
 alloc_skb include/linux/skbuff.h:1267 [inline]
 alloc_skb_with_frags+0xb4/0x780 net/core/skbuff.c:6126
 sock_alloc_send_pskb+0x938/0xa70 net/core/sock.c:2719
 sock_alloc_send_skb include/net/sock.h:1884 [inline]
 mld_newpack+0x19f/0xa30 net/ipv6/mcast.c:1748
 add_grhead+0x5e/0x290 net/ipv6/mcast.c:1851
 add_grec+0x14c9/0x17c0 net/ipv6/mcast.c:1989
 mld_send_cr net/ipv6/mcast.c:2115 [inline]
 mld_ifc_work+0x68d/0xc70 net/ipv6/mcast.c:2653
 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289

Memory state around the buggy address:
 ffff888041d55600: 00 00 00 00 00 00 00 00 00 01 fc fc fc fc fc fc
 ffff888041d55680: 00 00 00 00 00 00 00 00 00 00 01 fc fc fc fc fc
>ffff888041d55700: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc
                                              ^
 ffff888041d55780: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
 ffff888041d55800: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
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