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BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5971 [inline]
BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x12cf/0x3ca0 net/bluetooth/hci_event.c:6245
Read of size 1 at addr ffff8881445e7407 by task kworker/u5:0/147

CPU: 1 PID: 147 Comm: kworker/u5:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: hci3 hci_rx_work
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 print_address_description+0x60/0x2d0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xdf/0x130 mm/kasan/report.c:451
 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5971 [inline]
 hci_le_meta_evt+0x12cf/0x3ca0 net/bluetooth/hci_event.c:6245
 hci_event_packet+0xe0b/0x1310 net/bluetooth/hci_event.c:6562
 hci_rx_work+0x255/0xa10 net/bluetooth/hci_core.c:5190
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Allocated by task 4557:
 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 mm/kasan/common.c:513 [inline]
 __kasan_kmalloc+0xaf/0xe0 mm/kasan/common.c:522
 kmalloc_reserve net/core/skbuff.c:356 [inline]
 __alloc_skb+0x22c/0x750 net/core/skbuff.c:427
 alloc_skb include/linux/skbuff.h:1162 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:395 [inline]
 vhci_get_user drivers/bluetooth/hci_vhci.c:170 [inline]
 vhci_write+0xbd/0x440 drivers/bluetooth/hci_vhci.c:290
 call_write_iter include/linux/fs.h:2173 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x748/0xd70 fs/read_write.c:594
 ksys_write+0x153/0x260 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff8881445e7000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 7 bytes to the right of
 1024-byte region [ffff8881445e7000, ffff8881445e7400)
The buggy address belongs to the page:
page:ffffea0005117800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1445e0
head:ffffea0005117800 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x57ff00000010200(slab|head|node=1|zone=2|lastcpupid=0x7ff)
raw: 057ff00000010200 ffffea0001fa2c00 0000000600000006 ffff888016c41dc0
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 3144632829, free_ts 0
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x24f6/0x2670 mm/page_alloc.c:4192
 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
 alloc_page_interleave+0x24/0x1e0 mm/mempolicy.c:2031
 alloc_slab_page mm/slub.c:1780 [inline]
 allocate_slab mm/slub.c:1917 [inline]
 new_slab+0xc0/0x4b0 mm/slub.c:1980
 ___slab_alloc+0x807/0xdd0 mm/slub.c:3013
 __slab_alloc mm/slub.c:3100 [inline]
 slab_alloc_node mm/slub.c:3191 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 kmem_cache_alloc_trace+0xf9/0x290 mm/slub.c:3250
 kmalloc include/linux/slab.h:607 [inline]
 kzalloc include/linux/slab.h:738 [inline]
 __class_register+0x5d/0x400 drivers/base/class.c:160
 scsi_sysfs_register+0x3c/0x70 drivers/scsi/scsi_sysfs.c:571
 init_scsi+0x5c/0xe0 drivers/scsi/scsi.c:786
 do_one_initcall+0x272/0x730 init/main.c:1315
 do_initcall_level+0x13d/0x1f0 init/main.c:1388
 do_initcalls+0x4b/0x90 init/main.c:1404
 kernel_init_freeable+0x3d5/0x560 init/main.c:1628
 kernel_init+0x19/0x1b0 init/main.c:1519
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881445e7300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881445e7380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881445e7400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff8881445e7480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881445e7500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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