Bluetooth: hci4: advertising data len corrected Bluetooth: Unknown advertising packet type: 0x100 Bluetooth: hci4: advertising data len corrected Bluetooth: Unknown advertising packet type: 0x100 ================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5472 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x383e/0x3f20 net/bluetooth/hci_event.c:5714 Read of size 1 at addr ffff8880a8ce564e by task kworker/u5:2/8132 CPU: 1 PID: 8132 Comm: kworker/u5:2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: hci4 hci_rx_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load1_noabort+0x88/0x90 mm/kasan/report.c:430 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5472 [inline] hci_le_meta_evt+0x383e/0x3f20 net/bluetooth/hci_event.c:5714 hci_event_packet+0x34ad/0x7e20 net/bluetooth/hci_event.c:5959 hci_rx_work+0x4ad/0xc70 net/bluetooth/hci_core.c:4380 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Allocated by task 9584: __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:339 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:180 [inline] vhci_write+0xbd/0x450 drivers/bluetooth/hci_vhci.c:299 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8842: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 skb_free_head net/core/skbuff.c:563 [inline] skb_release_data+0x6de/0x920 net/core/skbuff.c:583 skb_release_all net/core/skbuff.c:640 [inline] __kfree_skb net/core/skbuff.c:654 [inline] kfree_skb+0x11a/0x3d0 net/core/skbuff.c:672 __netif_receive_skb_core+0x535/0x3270 net/core/dev.c:4928 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:4952 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066 process_backlog+0x241/0x700 net/core/dev.c:5849 napi_poll net/core/dev.c:6280 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346 __do_softirq+0x265/0x980 kernel/softirq.c:292 The buggy address belongs to the object at ffff8880a8ce5240 which belongs to the cache kmalloc-1024 of size 1024 The buggy address is located 14 bytes to the right of 1024-byte region [ffff8880a8ce5240, ffff8880a8ce5640) The buggy address belongs to the page: page:ffffea0002a33900 count:1 mapcount:0 mapping:ffff88813bff0ac0 index:0xffff8880a8ce5b40 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffffea0002535988 ffffea00027f1c88 ffff88813bff0ac0 raw: ffff8880a8ce5b40 ffff8880a8ce4040 0000000100000005 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a8ce5500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a8ce5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880a8ce5600: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8880a8ce5680: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff8880a8ce5700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================