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BUG: KASAN: slab-out-of-bounds in hfs_bnode_read+0x1b4/0x2dc fs/hfs/bnode.c:37
Write of size 94 at addr ffff0000ce8b9900 by task syz.1.197/4904

CPU: 1 PID: 4904 Comm: syz.1.197 Not tainted 5.15.171-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x174/0x1e4 mm/kasan/report.c:451
 kasan_check_range+0x274/0x2b4 mm/kasan/generic.c:189
 memcpy+0xb4/0xe8 mm/kasan/shadow.c:66
 hfs_bnode_read+0x1b4/0x2dc fs/hfs/bnode.c:37
 hfs_bnode_read_key+0x154/0x21c fs/hfs/bnode.c:73
 hfs_brec_insert+0x620/0x97c fs/hfs/brec.c:159
 hfs_cat_create+0x340/0x844 fs/hfs/catalog.c:118
 hfs_mkdir+0x70/0xe4 fs/hfs/dir.c:232
 vfs_mkdir+0x334/0x4e4 fs/namei.c:4065
 do_mkdirat+0x20c/0x610 fs/namei.c:4090
 __do_sys_mkdirat fs/namei.c:4105 [inline]
 __se_sys_mkdirat fs/namei.c:4103 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4103
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Allocated by task 4904:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc+0xbc/0xfc mm/kasan/common.c:513
 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522
 kasan_kmalloc include/linux/kasan.h:264 [inline]
 __kmalloc+0x29c/0x4c8 mm/slub.c:4407
 kmalloc include/linux/slab.h:596 [inline]
 hfs_find_init+0x88/0x1c8 fs/hfs/bfind.c:21
 hfs_cat_create+0x168/0x844 fs/hfs/catalog.c:96
 hfs_mkdir+0x70/0xe4 fs/hfs/dir.c:232
 vfs_mkdir+0x334/0x4e4 fs/namei.c:4065
 do_mkdirat+0x20c/0x610 fs/namei.c:4090
 __do_sys_mkdirat fs/namei.c:4105 [inline]
 __se_sys_mkdirat fs/namei.c:4103 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4103
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Last potentially related work creation:
 kasan_save_stack+0x38/0x68 mm/kasan/common.c:38
 kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348
 kvfree_call_rcu+0xb8/0x684 kernel/rcu/tree.c:3596
 cfg80211_update_known_bss+0x13c/0x7e0
 cfg80211_bss_update+0x160/0x1d28 net/wireless/scan.c:1800
 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2519 [inline]
 cfg80211_inform_bss_frame_data+0x7f0/0x1dc4 net/wireless/scan.c:2552
 ieee80211_bss_info_update+0x648/0xab0 net/mac80211/scan.c:190
 ieee80211_rx_bss_info net/mac80211/ibss.c:1123 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1614 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x7d8/0x2814 net/mac80211/ibss.c:1643
 ieee80211_iface_process_skb net/mac80211/iface.c:1456 [inline]
 ieee80211_iface_work+0x5b4/0xa80 net/mac80211/iface.c:1510
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870

The buggy address belongs to the object at ffff0000ce8b9900
 which belongs to the cache kmalloc-128 of size 128
The buggy address is located 0 bytes inside of
 128-byte region [ffff0000ce8b9900, ffff0000ce8b9980)
The buggy address belongs to the page:
page:000000008f7393e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10e8b9
flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000200 fffffc000355bf40 0000000500000002 ffff0000c0002300
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000ce8b9800: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
 ffff0000ce8b9880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000ce8b9900: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc
                                              ^
 ffff0000ce8b9980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000ce8b9a00: 00 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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