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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 fs/hfs/bnode.c:35 [inline]
BUG: KASAN: slab-out-of-bounds in hfs_bnode_read_key+0x314/0x450 fs/hfs/bnode.c:70
Write of size 94 at addr ffff888144f26600 by task syz.2.1903/15260

CPU: 0 UID: 0 PID: 15260 Comm: syz.2.1903 Not tainted 6.14.0-rc1-next-20250207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 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 fs/hfs/bnode.c:35 [inline]
 hfs_bnode_read_key+0x314/0x450 fs/hfs/bnode.c:70
 hfs_brec_insert+0x7f3/0xbd0 fs/hfs/brec.c:159
 hfs_cat_create+0x41d/0xa50 fs/hfs/catalog.c:118
 hfs_create+0x66/0xe0 fs/hfs/dir.c:202
 vfs_create+0x23c/0x3d0 fs/namei.c:3345
 do_mknodat+0x447/0x5b0 fs/namei.c:4236
 __do_sys_mknod fs/namei.c:4269 [inline]
 __se_sys_mknod fs/namei.c:4267 [inline]
 __x64_sys_mknod+0x8c/0xa0 fs/namei.c:4267
 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: 0033:0x7f7ed8d8cde9
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:00007f7ed9c82038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007f7ed8fa6160 RCX: 00007f7ed8d8cde9
RDX: 0000000000000000 RSI: 0000000000000290 RDI: 0000200000000100
RBP: 00007f7ed8e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7ed8fa6160 R15: 00007ffda1c5bd68
 </TASK>

Allocated by task 15260:
 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:4308 [inline]
 __kmalloc_noprof+0x285/0x4c0 mm/slub.c:4320
 kmalloc_noprof include/linux/slab.h:906 [inline]
 hfs_find_init+0x90/0x1f0 fs/hfs/bfind.c:21
 hfs_cat_create+0x182/0xa50 fs/hfs/catalog.c:96
 hfs_create+0x66/0xe0 fs/hfs/dir.c:202
 vfs_create+0x23c/0x3d0 fs/namei.c:3345
 do_mknodat+0x447/0x5b0 fs/namei.c:4236
 __do_sys_mknod fs/namei.c:4269 [inline]
 __se_sys_mknod fs/namei.c:4267 [inline]
 __x64_sys_mknod+0x8c/0xa0 fs/namei.c:4267
 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 ffff888144f26600
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
 allocated 78-byte region [ffff888144f26600, ffff888144f2664e)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144f26
ksm flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000000 ffff88801ac41280 ffffea00050eda40 dead000000000003
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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5841, tgid 5841 (syz-executor), ts 92492874703, free_ts 58325465127
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1629
 prep_new_page mm/page_alloc.c:1637 [inline]
 get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3555
 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4817
 alloc_slab_page mm/slub.c:2439 [inline]
 allocate_slab+0x66/0x3a0 mm/slub.c:2601
 new_slab mm/slub.c:2654 [inline]
 ___slab_alloc+0xc27/0x14a0 mm/slub.c:3840
 __slab_alloc+0x58/0xa0 mm/slub.c:3930
 __slab_alloc_node mm/slub.c:4005 [inline]
 slab_alloc_node mm/slub.c:4166 [inline]
 __kmalloc_cache_node_noprof+0x294/0x3a0 mm/slub.c:4347
 kmalloc_node_noprof include/linux/slab.h:925 [inline]
 alloc_node_nr_active kernel/workqueue.c:4870 [inline]
 __alloc_workqueue+0x709/0x1f20 kernel/workqueue.c:5724
 alloc_workqueue+0xd6/0x210 kernel/workqueue.c:5784
 ieee80211_register_hw+0x2e15/0x4240 net/mac80211/main.c:1489
 mac80211_hwsim_new_radio+0x2a9f/0x4aa0 drivers/net/wireless/virtual/mac80211_hwsim.c:5558
 hwsim_new_radio_nl+0xece/0x2290 drivers/net/wireless/virtual/mac80211_hwsim.c:6242
 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
page last free pid 5498 tgid 5498 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1205 [inline]
 free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2738
 __slab_free+0x2c2/0x380 mm/slub.c:4534
 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:4129 [inline]
 slab_alloc_node mm/slub.c:4178 [inline]
 kmem_cache_alloc_node_noprof+0x1d9/0x380 mm/slub.c:4230
 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:668
 alloc_skb include/linux/skbuff.h:1331 [inline]
 alloc_skb_with_frags+0xc3/0x820 net/core/skbuff.c:6612
 sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2897
 unix_dgram_sendmsg+0x5f1/0x1df0 net/unix/af_unix.c:2017
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:733
 sock_write_iter+0x2d7/0x3f0 net/socket.c:1137
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xacf/0xd10 fs/read_write.c:679
 ksys_write+0x18f/0x2b0 fs/read_write.c:731
 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

Memory state around the buggy address:
 ffff888144f26500: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
 ffff888144f26580: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
>ffff888144f26600: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc
                                              ^
 ffff888144f26680: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
 ffff888144f26700: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
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