Bluetooth: hci3: Unknown advertising packet type: 0x3438 ================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5962 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x133f/0x3c90 net/bluetooth/hci_event.c:6235 Read of size 1 at addr ffff88805ec6e604 by task kworker/u5:8/4202 CPU: 1 PID: 4202 Comm: kworker/u5:8 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: hci3 hci_rx_work Call Trace: 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:5962 [inline] hci_le_meta_evt+0x133f/0x3c90 net/bluetooth/hci_event.c:6235 hci_event_packet+0xe48/0x1370 net/bluetooth/hci_event.c:6552 hci_rx_work+0x255/0xa10 net/bluetooth/hci_core.c:5160 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 4307: 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+0xb5/0xf0 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:392 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:170 [inline] vhci_write+0xbc/0x450 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+0x745/0xd60 fs/read_write.c:594 ksys_write+0x152/0x260 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 ffff88805ec6e400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 4 bytes to the right of 512-byte region [ffff88805ec6e400, ffff88805ec6e600) The buggy address belongs to the page: page:ffffea00017b1b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5ec6c head:ffffea00017b1b00 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888016c41c80 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1f2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_MEMALLOC|__GFP_HARDWALL), pid 4278, ts 76753861055, free_ts 76729170478 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5487 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+0x80a/0xdd0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] __kmalloc_node_track_caller+0x1fc/0x3a0 mm/slub.c:4963 kmalloc_reserve net/core/skbuff.c:356 [inline] __alloc_skb+0x22c/0x750 net/core/skbuff.c:427 __netdev_alloc_skb+0x110/0x4c0 net/core/skbuff.c:494 netdev_alloc_skb include/linux/skbuff.h:3024 [inline] dev_alloc_skb include/linux/skbuff.h:3037 [inline] __ieee80211_beacon_get+0xaa1/0x2000 net/mac80211/tx.c:5088 ieee80211_beacon_get_tim+0x48/0x840 net/mac80211/tx.c:5202 ieee80211_beacon_get include/net/mac80211.h:4983 [inline] mac80211_hwsim_beacon_tx+0xf4/0x920 drivers/net/wireless/mac80211_hwsim.c:1812 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0xb3/0x140 net/mac80211/util.c:829 mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x4eb/0xb70 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766 handle_softirqs+0x339/0x830 kernel/softirq.c:576 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396 stack_depot_save+0x418/0x440 lib/stackdepot.c:335 kasan_save_stack mm/kasan/common.c:40 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0xb3/0xd0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3238 kmem_cache_zalloc include/linux/slab.h:728 [inline] fill_pool lib/debugobjects.c:172 [inline] __debug_object_init+0x9a8/0xc80 lib/debugobjects.c:615 debug_timer_init kernel/time/timer.c:724 [inline] debug_init kernel/time/timer.c:772 [inline] init_timer_key+0x3d/0x2a0 kernel/time/timer.c:816 sock_init_data_uid+0x70/0xbe0 net/core/sock.c:3169 inet_create+0x95c/0xef0 net/ipv4/af_inet.c:351 __sock_create+0x47b/0x900 net/socket.c:1495 sock_create net/socket.c:1551 [inline] __sys_socket+0xe2/0x170 net/socket.c:1593 __do_sys_socket net/socket.c:1602 [inline] __se_sys_socket net/socket.c:1600 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1600 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 Memory state around the buggy address: ffff88805ec6e500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805ec6e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805ec6e600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805ec6e680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805ec6e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================