Bluetooth: hci4: Unknown advertising packet type: 0xff Bluetooth: hci4: Unknown advertising packet type: 0xff00 ================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5972 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x12ea/0x3ca0 net/bluetooth/hci_event.c:6245 Read of size 1 at addr ffff88806115c406 by task kworker/u5:2/17796 CPU: 0 PID: 17796 Comm: kworker/u5:2 Tainted: G S syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 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:5972 [inline] hci_le_meta_evt+0x12ea/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 Allocated by task 19799: 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 ffff88806115c000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 6 bytes to the right of 1024-byte region [ffff88806115c000, ffff88806115c400) The buggy address belongs to the page: page:ffffea0001845600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x61158 head:ffffea0001845600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 0000000c00000001 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 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 155, ts 1134013170649, free_ts 1133979008408 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_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] __kmalloc_node_track_caller+0x13d/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] nlmsg_new include/net/netlink.h:964 [inline] inet6_rt_notify+0xe0/0x290 net/ipv6/route.c:6183 fib6_del_route net/ipv6/ip6_fib.c:1999 [inline] fib6_del+0x10f2/0x1550 net/ipv6/ip6_fib.c:2034 fib6_clean_node+0x28c/0x540 net/ipv6/ip6_fib.c:2196 fib6_walk_continue+0x662/0x8b0 net/ipv6/ip6_fib.c:2118 fib6_walk+0x149/0x270 net/ipv6/ip6_fib.c:2166 fib6_clean_tree net/ipv6/ip6_fib.c:2246 [inline] __fib6_clean_all+0x252/0x3b0 net/ipv6/ip6_fib.c:2262 rt6_sync_down_dev net/ipv6/route.c:4914 [inline] rt6_disable_ip+0x127/0x6b0 net/ipv6/route.c:4919 addrconf_ifdown+0x149/0x19f0 net/ipv6/addrconf.c:3785 addrconf_notify+0x445/0xf20 net/ipv6/addrconf.c:-1 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:391 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 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444 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_trace+0x165/0x290 mm/slub.c:3250 kmalloc include/linux/slab.h:607 [inline] kzalloc include/linux/slab.h:738 [inline] mld_add_delrec net/ipv6/mcast.c:746 [inline] igmp6_leave_group net/ipv6/mcast.c:2664 [inline] igmp6_group_dropped+0x5ed/0x1180 net/ipv6/mcast.c:727 __ipv6_dev_mc_dec+0x2c6/0x340 net/ipv6/mcast.c:984 addrconf_leave_solict net/ipv6/addrconf.c:2223 [inline] __ipv6_ifa_notify+0x75d/0xe60 net/ipv6/addrconf.c:6211 addrconf_ifdown+0xe34/0x19f0 net/ipv6/addrconf.c:3909 addrconf_notify+0x445/0xf20 net/ipv6/addrconf.c:-1 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:391 call_netdevice_notifiers_extack net/core/dev.c:2074 [inline] call_netdevice_notifiers net/core/dev.c:2088 [inline] dev_close_many+0x29c/0x400 net/core/dev.c:1663 unregister_netdevice_many+0x4b8/0x1a40 net/core/dev.c:11136 default_device_exit_batch+0x364/0x3c0 net/core/dev.c:11693 Memory state around the buggy address: ffff88806115c300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88806115c380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88806115c400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88806115c480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88806115c500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================