Bluetooth: hci1: Unknown advertising packet type: 0x3c ================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5965 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x133f/0x3c90 net/bluetooth/hci_event.c:6238 Read of size 1 at addr ffff888077da8408 by task kworker/u5:7/4200 CPU: 1 PID: 4200 Comm: kworker/u5:7 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: hci1 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:5965 [inline] hci_le_meta_evt+0x133f/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 17584: 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 ffff888077da8000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 8 bytes to the right of 1024-byte region [ffff888077da8000, ffff888077da8400) The buggy address belongs to the page: page:ffffea0001df6a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x77da8 head:ffffea0001df6a00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001f05a00 0000000400000004 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 12249, ts 470219976502, free_ts 468309731867 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] nlmsg_new include/net/netlink.h:953 [inline] xfrm_send_acquire+0x15b/0xf80 net/xfrm/xfrm_user.c:3285 km_query+0xe3/0x1d0 net/xfrm/xfrm_state.c:2246 xfrm_state_find+0x1f75/0x2ac0 net/xfrm/xfrm_state.c:1160 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2420 [inline] xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2465 [inline] xfrm_resolve_and_create_bundle+0x766/0x2bf0 net/xfrm/xfrm_policy.c:2760 xfrm_lookup_with_ifid+0x272/0x2000 net/xfrm/xfrm_policy.c:3094 xfrm_lookup net/xfrm/xfrm_policy.c:3223 [inline] xfrm_lookup_route+0x38/0x1a0 net/xfrm/xfrm_policy.c:3234 udp_sendmsg+0x15dd/0x2370 net/ipv4/udp.c:1245 sock_sendmsg_nosec net/socket.c:706 [inline] __sock_sendmsg net/socket.c:718 [inline] ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2445 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2499 __sys_sendmmsg+0x2ba/0x500 net/socket.c:2585 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 __vunmap+0x8b9/0xa50 mm/vmalloc.c:2628 kcov_mmap+0x89/0x120 kernel/kcov.c:498 call_mmap include/linux/fs.h:2178 [inline] mmap_file+0x5d/0xb0 mm/util.c:1092 __mmap_region mm/mmap.c:1796 [inline] mmap_region+0xf88/0x1650 mm/mmap.c:2933 do_mmap+0x819/0xe90 mm/mmap.c:1586 vm_mmap_pgoff+0x1c1/0x2d0 mm/util.c:551 ksys_mmap_pgoff+0x54b/0x790 mm/mmap.c:1635 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: ffff888077da8300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888077da8380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888077da8400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888077da8480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888077da8500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================