================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5935 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0xce8/0x3010 net/bluetooth/hci_event.c:6208 Read of size 1 at addr ffff0000c7a7fe04 by task kworker/u5:2/4028 CPU: 1 PID: 4028 Comm: kworker/u5:2 Not tainted 5.15.181-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Workqueue: hci0 hci_rx_work Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x78/0x30c mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xec/0x15c mm/kasan/report.c:451 __asan_report_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5935 [inline] hci_le_meta_evt+0xce8/0x3010 net/bluetooth/hci_event.c:6208 hci_event_packet+0xd10/0x11bc net/bluetooth/hci_event.c:6525 hci_rx_work+0x1cc/0x880 net/bluetooth/hci_core.c:5160 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457 kthread+0x374/0x454 kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Allocated by task 6395: 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+0xb0/0xf0 mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc_node_track_caller+0x234/0x3bc mm/slub.c:4963 kmalloc_reserve+0xe4/0x26c net/core/skbuff.c:356 __alloc_skb+0x23c/0x67c 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+0xb8/0x3ac drivers/bluetooth/hci_vhci.c:290 call_write_iter include/linux/fs.h:2172 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x7c8/0xa2c fs/read_write.c:594 ksys_write+0x120/0x210 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:656 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Last potentially related work creation: kasan_save_stack+0x38/0x68 mm/kasan/common.c:38 kasan_record_aux_stack+0xcc/0x114 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3007 [inline] call_rcu+0x110/0x8f0 kernel/rcu/tree.c:3087 inetdev_destroy net/ipv4/devinet.c:330 [inline] inetdev_event+0x5f8/0x127c net/ipv4/devinet.c:1612 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2049 [inline] call_netdevice_notifiers_extack net/core/dev.c:2061 [inline] call_netdevice_notifiers net/core/dev.c:2075 [inline] unregister_netdevice_many+0xe10/0x17d0 net/core/dev.c:11134 default_device_exit_batch+0x444/0x4a4 net/core/dev.c:11667 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x644/0xa98 net/core/net_namespace.c:635 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457 kthread+0x374/0x454 kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the object at ffff0000c7a7fc00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 4 bytes to the right of 512-byte region [ffff0000c7a7fc00, ffff0000c7a7fe00) The buggy address belongs to the page: page:0000000060819b54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107a7c head:0000000060819b54 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002600 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000c7a7fd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000c7a7fd80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000c7a7fe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000c7a7fe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000c7a7ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== Bluetooth: hci0: Unknown advertising packet type: 0x2d74 Bluetooth: hci0: Unknown advertising packet type: 0xe0ff Bluetooth: hci0: Unknown advertising packet type: 0xffff Bluetooth: hci0: Unknown advertising packet type: 0xffff Bluetooth: hci0: Unknown advertising packet type: 0xffff Bluetooth: hci0: Unknown advertising packet type: 0xffff Bluetooth: hci0: Unknown advertising packet type: 0xffff Bluetooth: hci0: Unknown advertising packet type: 0xffff Bluetooth: hci0: Unknown advertising packet type: 0xffff Bluetooth: hci0: Unknown advertising packet type: 0xffff