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BUG: KASAN: slab-out-of-bounds in memcpy_from_page include/linux/highmem.h:423 [inline]
BUG: KASAN: slab-out-of-bounds in hfs_bnode_read+0x167/0x200 fs/hfs/bnode.c:35
Write of size 94 at addr ffff88803088cf80 by task syz.5.167/7363

CPU: 0 UID: 0 PID: 7363 Comm: syz.5.167 Not tainted 6.14.0-syzkaller-00624-g2f2d52945852 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0x16e/0x5b0 mm/kasan/report.c:521
 kasan_report+0x143/0x180 mm/kasan/report.c:634
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
 memcpy_from_page include/linux/highmem.h:423 [inline]
 hfs_bnode_read+0x167/0x200 fs/hfs/bnode.c:35
 hfs_bnode_read_key+0x172/0x240 fs/hfs/bnode.c:70
 hfs_brec_insert+0x7f3/0xbd0 fs/hfs/brec.c:159
 hfs_cat_create+0x3dc/0x760 fs/hfs/catalog.c:118
 hfs_create+0x66/0xe0 fs/hfs/dir.c:202
 lookup_open fs/namei.c:3666 [inline]
 open_last_lookups fs/namei.c:3765 [inline]
 path_openat+0x1954/0x35b0 fs/namei.c:4001
 do_filp_open+0x282/0x4e0 fs/namei.c:4031
 do_sys_openat2+0x122/0x1c0 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f28c758d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f28c8383038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f28c77a5fa0 RCX: 00007f28c758d169
RDX: 0000000000185042 RSI: 0000200000000280 RDI: ffffffffffffff9c
RBP: 00007f28c760e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000120 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f28c77a5fa0 R15: 00007ffe7e5bdb28
 </TASK>

Allocated by task 7363:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4318 [inline]
 __kmalloc_noprof+0x285/0x4c0 mm/slub.c:4330
 kmalloc_noprof include/linux/slab.h:906 [inline]
 hfs_find_init+0x90/0x1f0 fs/hfs/bfind.c:21
 hfs_cat_create+0x17f/0x760 fs/hfs/catalog.c:96
 hfs_create+0x66/0xe0 fs/hfs/dir.c:202
 lookup_open fs/namei.c:3666 [inline]
 open_last_lookups fs/namei.c:3765 [inline]
 path_openat+0x1954/0x35b0 fs/namei.c:4001
 do_filp_open+0x282/0x4e0 fs/namei.c:4031
 do_sys_openat2+0x122/0x1c0 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88803088cf80
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
 allocated 78-byte region [ffff88803088cf80, ffff88803088cfce)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3088c
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041280 ffffea0000cbff00 dead000000000002
raw: 0000000000000000 0000000080200020 00000000f5000000 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 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 3516, tgid 3516 (kworker/u8:8), ts 83199618517, free_ts 82997088875
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4740
 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2301
 alloc_slab_page mm/slub.c:2446 [inline]
 allocate_slab+0x8f/0x3a0 mm/slub.c:2610
 new_slab mm/slub.c:2663 [inline]
 ___slab_alloc+0xc27/0x14a0 mm/slub.c:3849
 __slab_alloc+0x58/0xa0 mm/slub.c:3939
 __slab_alloc_node mm/slub.c:4014 [inline]
 slab_alloc_node mm/slub.c:4175 [inline]
 __do_kmalloc_node mm/slub.c:4317 [inline]
 __kmalloc_noprof+0x2e6/0x4c0 mm/slub.c:4330
 kmalloc_noprof include/linux/slab.h:906 [inline]
 kzalloc_noprof include/linux/slab.h:1036 [inline]
 cfg80211_inform_single_bss_data+0xb47/0x1ee0 net/wireless/scan.c:2339
 cfg80211_inform_bss_data+0x3c3/0x5820 net/wireless/scan.c:3222
 cfg80211_inform_bss_frame_data+0x3bb/0x720 net/wireless/scan.c:3317
 ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226
 ieee80211_rx_bss_info net/mac80211/ibss.c:1102 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1581 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x1993/0x2e00 net/mac80211/ibss.c:1608
 ieee80211_iface_process_skb net/mac80211/iface.c:1612 [inline]
 ieee80211_iface_work+0x8dc/0xf90 net/mac80211/iface.c:1666
 cfg80211_wiphy_work+0x2f0/0x490 net/wireless/core.c:435
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319
page last free pid 1086 tgid 1086 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xe04/0x10e0 mm/page_alloc.c:2660
 discard_slab mm/slub.c:2707 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3176
 put_cpu_partial+0x17c/0x250 mm/slub.c:3251
 __slab_free+0x290/0x380 mm/slub.c:4503
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4138 [inline]
 slab_alloc_node mm/slub.c:4187 [inline]
 kmem_cache_alloc_node_noprof+0x1d9/0x380 mm/slub.c:4239
 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:596
 alloc_skb include/linux/skbuff.h:1331 [inline]
 mld_newpack+0x17c/0xc70 net/ipv6/mcast.c:1788
 add_grhead net/ipv6/mcast.c:1899 [inline]
 add_grec+0x1492/0x19a0 net/ipv6/mcast.c:2037
 mld_send_initial_cr+0x228/0x4b0 net/ipv6/mcast.c:2282
 ipv6_mc_dad_complete+0x88/0x490 net/ipv6/mcast.c:2293
 addrconf_dad_completed+0x712/0xcd0 net/ipv6/addrconf.c:4336
 addrconf_dad_work+0xdbc/0x16a0
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319

Memory state around the buggy address:
 ffff88803088ce80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
 ffff88803088cf00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88803088cf80: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc
                                              ^
 ffff88803088d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88803088d080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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