device veth1_macvtap left promiscuous mode device veth0_macvtap left promiscuous mode device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode ================================================================== BUG: KASAN: use-after-free in __queue_work+0xc2e/0xf70 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:1385 Read of size 4 at addr ffff8880a96dfe00 by task syz-executor.0/9510 CPU: 1 PID: 9510 Comm: syz-executor.0 Not tainted 4.14.218-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack syzkaller/managers/linux-4-14/kernel/lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 syzkaller/managers/linux-4-14/kernel/lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 syzkaller/managers/linux-4-14/kernel/mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x191 syzkaller/managers/linux-4-14/kernel/mm/kasan/report.c:351 kasan_report syzkaller/managers/linux-4-14/kernel/mm/kasan/report.c:409 [inline] __asan_report_load4_noabort+0x68/0x70 syzkaller/managers/linux-4-14/kernel/mm/kasan/report.c:429 __queue_work+0xc2e/0xf70 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:1385 queue_work_on+0x159/0x1d0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:1490 queue_work syzkaller/managers/linux-4-14/kernel/./include/linux/workqueue.h:491 [inline] req_run+0x2ca/0x4f0 syzkaller/managers/linux-4-14/kernel/net/bluetooth/hci_request.c:77 hci_req_run_skb syzkaller/managers/linux-4-14/kernel/net/bluetooth/hci_request.c:89 [inline] __hci_req_sync+0x2b5/0x7e0 syzkaller/managers/linux-4-14/kernel/net/bluetooth/hci_request.c:214 hci_req_sync+0x71/0xa0 syzkaller/managers/linux-4-14/kernel/net/bluetooth/hci_request.c:285 hci_inquiry+0x5d4/0x810 syzkaller/managers/linux-4-14/kernel/net/bluetooth/hci_core.c:1272 hci_sock_ioctl+0x16d/0x690 syzkaller/managers/linux-4-14/kernel/net/bluetooth/hci_sock.c:1043 sock_do_ioctl syzkaller/managers/linux-4-14/kernel/net/socket.c:974 [inline] sock_ioctl+0x2cc/0x4c0 syzkaller/managers/linux-4-14/kernel/net/socket.c:1071 vfs_ioctl syzkaller/managers/linux-4-14/kernel/fs/ioctl.c:46 [inline] file_ioctl syzkaller/managers/linux-4-14/kernel/fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 syzkaller/managers/linux-4-14/kernel/fs/ioctl.c:684 SYSC_ioctl syzkaller/managers/linux-4-14/kernel/fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 syzkaller/managers/linux-4-14/kernel/fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007fcb11e68188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000020000240 RSI: 00000000800448f0 RDI: 0000000000000005 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc51c0c80f R14: 00007fcb11e68300 R15: 0000000000022000 Allocated by task 3: save_stack syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:447 [inline] set_track syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:551 __do_kmalloc syzkaller/managers/linux-4-14/kernel/mm/slab.c:3720 [inline] __kmalloc+0x15a/0x400 syzkaller/managers/linux-4-14/kernel/mm/slab.c:3729 kmalloc syzkaller/managers/linux-4-14/kernel/./include/linux/slab.h:493 [inline] kzalloc syzkaller/managers/linux-4-14/kernel/./include/linux/slab.h:661 [inline] __alloc_workqueue_key+0x10e/0x1080 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:4003 hci_register_dev+0x1af/0x8f0 syzkaller/managers/linux-4-14/kernel/net/bluetooth/hci_core.c:3099 __vhci_create_device+0x28d/0x540 syzkaller/managers/linux-4-14/kernel/drivers/bluetooth/hci_vhci.c:139 vhci_create_device syzkaller/managers/linux-4-14/kernel/drivers/bluetooth/hci_vhci.c:163 [inline] vhci_open_timeout+0x35/0x50 syzkaller/managers/linux-4-14/kernel/drivers/bluetooth/hci_vhci.c:319 process_one_work+0x793/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2250 kthread+0x30d/0x420 syzkaller/managers/linux-4-14/kernel/kernel/kthread.c:232 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/entry_64.S:404 Freed by task 9531: save_stack syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:447 [inline] set_track syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:524 __cache_free syzkaller/managers/linux-4-14/kernel/mm/slab.c:3496 [inline] kfree+0xc9/0x250 syzkaller/managers/linux-4-14/kernel/mm/slab.c:3815 __rcu_reclaim syzkaller/managers/linux-4-14/kernel/kernel/rcu/rcu.h:195 [inline] rcu_do_batch syzkaller/managers/linux-4-14/kernel/kernel/rcu/tree.c:2699 [inline] invoke_rcu_callbacks syzkaller/managers/linux-4-14/kernel/kernel/rcu/tree.c:2962 [inline] __rcu_process_callbacks syzkaller/managers/linux-4-14/kernel/kernel/rcu/tree.c:2929 [inline] rcu_process_callbacks+0x780/0x1180 syzkaller/managers/linux-4-14/kernel/kernel/rcu/tree.c:2946 __do_softirq+0x24d/0x9ff syzkaller/managers/linux-4-14/kernel/kernel/softirq.c:288 The buggy address belongs to the object at ffff8880a96dfc80 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 384 bytes inside of 512-byte region [ffff8880a96dfc80, ffff8880a96dfe80) The buggy address belongs to the page: page:ffffea0002a5b7c0 count:1 mapcount:0 mapping:ffff8880a96df000 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffff8880a96df000 0000000000000000 0000000100000006 raw: ffffea0002a40c60 ffffea00026cd720 ffff88813fe80940 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a96dfd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a96dfd80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880a96dfe00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880a96dfe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a96dff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================