Bluetooth: hci3: Unknown advertising packet type: 0x20 ================================================================== 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 ffff88807485640a by task kworker/u5:3/4198 CPU: 1 PID: 4198 Comm: kworker/u5:3 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: 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 Allocated by task 4893: 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 ffff888074856000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 10 bytes to the right of 1024-byte region [ffff888074856000, ffff888074856400) The buggy address belongs to the page: page:ffffea0001d21400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x74850 head:ffffea0001d21400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0000ad8400 0000000400000004 ffff888016c41dc0 raw: 0000000000000000 0000000000100010 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 4271, ts 81471301344, free_ts 81436742752 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] pskb_expand_head+0x128/0x1100 net/core/skbuff.c:1710 __skb_unclone_keeptruesize net/core/skbuff.c:1810 [inline] skb_unclone_keeptruesize include/linux/skbuff.h:1742 [inline] skb_prepare_for_shift net/core/skbuff.c:3524 [inline] skb_shift+0x9b3/0x19a0 net/core/skbuff.c:3597 tcp_skb_shift net/ipv4/tcp_input.c:1542 [inline] tcp_shift_skb_data net/ipv4/tcp_input.c:1650 [inline] tcp_sacktag_walk+0x1187/0x1c90 net/ipv4/tcp_input.c:1717 tcp_sacktag_write_queue+0x1d7c/0x3a40 net/ipv4/tcp_input.c:1978 tcp_ack+0x123d/0x6140 net/ipv4/tcp_input.c:3934 tcp_rcv_established+0xb89/0x1d00 net/ipv4/tcp_input.c:6057 tcp_v4_do_rcv+0x435/0x9b0 net/ipv4/tcp_ipv4.c:1732 sk_backlog_rcv include/net/sock.h:1080 [inline] __release_sock+0x1e6/0x460 net/core/sock.c:2731 release_sock+0x5b/0x1b0 net/core/sock.c:3274 sk_stream_wait_memory+0x6e5/0xe60 net/core/stream.c:145 tcp_sendmsg_locked+0x121e/0x3330 net/ipv4/tcp.c:1422 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+0x15d/0x280 mm/slub.c:3238 kmem_cache_zalloc include/linux/slab.h:728 [inline] __kernfs_new_node+0xe3/0x6b0 fs/kernfs/dir.c:593 kernfs_new_node+0x148/0x250 fs/kernfs/dir.c:669 kernfs_create_dir_ns+0x40/0x120 fs/kernfs/dir.c:1005 internal_create_group+0x21a/0xd00 fs/sysfs/group.c:137 loop_sysfs_init drivers/block/loop.c:910 [inline] loop_configure+0xe48/0x1480 drivers/block/loop.c:1305 lo_ioctl+0x2e1/0x20e0 drivers/block/loop.c:1853 blkdev_ioctl+0x347/0x6f0 block/ioctl.c:604 block_ioctl+0xac/0xf0 block/fops.c:496 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 Memory state around the buggy address: ffff888074856300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888074856380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888074856400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888074856480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888074856500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================