Bluetooth: hci4: Unknown advertising packet type: 0xad3 Bluetooth: hci4: Unknown advertising packet type: 0x600 ================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5964 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x130d/0x3c90 net/bluetooth/hci_event.c:6238 Read of size 1 at addr ffff888077f7a400 by task kworker/u5:8/4206 CPU: 1 PID: 4206 Comm: kworker/u5:8 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: hci4 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:5964 [inline] hci_le_meta_evt+0x130d/0x3c90 net/bluetooth/hci_event.c:6238 hci_event_packet+0xe48/0x1370 net/bluetooth/hci_event.c:6555 hci_rx_work+0x255/0xa10 net/bluetooth/hci_core.c:5164 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 4783: 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 Last potentially related work creation: kasan_save_stack+0x35/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348 kvfree_call_rcu+0x105/0x7d0 kernel/rcu/tree.c:3600 neigh_del net/core/neighbour.c:197 [inline] neigh_remove_one+0x4e8/0x5f0 net/core/neighbour.c:218 neigh_forced_gc net/core/neighbour.c:251 [inline] neigh_alloc net/core/neighbour.c:429 [inline] ___neigh_create+0x468/0x2250 net/core/neighbour.c:591 ip6_finish_output2+0x9f6/0x1510 net/ipv6/ip6_output.c:127 dst_output include/net/dst.h:452 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xc2a/0x1500 net/ipv6/ndisc.c:513 addrconf_rs_timer+0x2d1/0x630 net/ipv6/addrconf.c:3956 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648 expire_timers kernel/time/timer.c:1699 [inline] __run_timers+0x53e/0x800 kernel/time/timer.c:1970 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983 handle_softirqs+0x339/0x830 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 The buggy address belongs to the object at ffff888077f7a000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 0 bytes to the right of 1024-byte region [ffff888077f7a000, ffff888077f7a400) The buggy address belongs to the page: page:ffffea0001dfde00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x77f78 head:ffffea0001dfde00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 dead000000000100 dead000000000122 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 3986, ts 48195032860, free_ts 48124341766 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:5501 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 alloc_skb include/linux/skbuff.h:1162 [inline] alloc_skb_with_frags+0xa7/0x730 net/core/skbuff.c:6183 sock_alloc_send_pskb+0x87f/0x9a0 net/core/sock.c:2536 packet_alloc_skb net/packet/af_packet.c:2936 [inline] packet_snd net/packet/af_packet.c:3031 [inline] packet_sendmsg+0x343c/0x5060 net/packet/af_packet.c:3120 sock_sendmsg_nosec net/socket.c:706 [inline] __sock_sendmsg net/socket.c:718 [inline] sock_write_iter+0x2a6/0x3a0 net/socket.c:1089 do_iter_readv_writev+0x47e/0x5f0 fs/read_write.c:-1 do_iter_write+0x205/0x7b0 fs/read_write.c:855 vfs_writev fs/read_write.c:928 [inline] do_writev+0x281/0x480 fs/read_write.c:971 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 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 free_nonslab_page+0xe2/0x150 mm/slub.c:3540 skb_free_head net/core/skbuff.c:655 [inline] skb_release_data+0x6b8/0x800 net/core/skbuff.c:677 skb_release_all net/core/skbuff.c:742 [inline] __kfree_skb net/core/skbuff.c:756 [inline] consume_skb+0xa2/0x100 net/core/skbuff.c:914 skb_free_datagram+0x25/0xe0 net/core/datagram.c:325 netlink_recvmsg+0x5c6/0xe20 net/netlink/af_netlink.c:1997 ____sys_recvmsg+0x2cd/0x5e0 net/socket.c:-1 ___sys_recvmsg+0x21a/0x5c0 net/socket.c:2706 __sys_recvmsg net/socket.c:2736 [inline] __do_sys_recvmsg net/socket.c:2746 [inline] __se_sys_recvmsg net/socket.c:2743 [inline] __x64_sys_recvmsg+0x1f9/0x2c0 net/socket.c:2743 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: ffff888077f7a300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888077f7a380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888077f7a400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888077f7a480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888077f7a500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================