Bluetooth: hci3: command 0x0406 tx timeout wlan1: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge) ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 INFO: task syz-executor.0:7549 blocked for more than 140 seconds. Not tainted 4.19.207-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27048 7549 1114 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:115 flush_workqueue+0x40b/0x13e0 kernel/workqueue.c:2713 nbd_start_device_ioctl drivers/block/nbd.c:1276 [inline] __nbd_ioctl drivers/block/nbd.c:1347 [inline] nbd_ioctl+0x75b/0xbe0 drivers/block/nbd.c:1387 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x5cb/0x1a80 block/ioctl.c:601 block_ioctl+0xe9/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f327c5c9709 Code: Bad RIP value. RSP: 002b:00007f3279b40188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f327c6cdf60 RCX: 00007f327c5c9709 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000009 RBP: 00007f327c623cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc1839fc0f R14: 00007f3279b40300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1569: #0: 000000004dfb7eb8 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7809: #0: 00000000b31dedc1 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by kworker/u5:2/8137: #0: 00000000c4f8871f ((wq_completion)"knbd%d-recv"nbd->index){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000006abd798c ((work_completion)(&args->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 2 locks held by agetty/29757: #0: 0000000093a79a8c (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000ffad79ae (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1950 drivers/tty/n_tty.c:2154 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1569 Comm: khungtaskd Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4683 Comm: systemd-journal Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:compound_head include/linux/page-flags.h:145 [inline] RIP: 0010:virt_to_head_page include/linux/mm.h:667 [inline] RIP: 0010:free_block+0xbd/0x230 mm/slab.c:3420 Code: 00 00 4c 8b 23 4c 89 e7 e8 70 72 93 ff 48 c1 e8 0c 49 89 c0 48 b8 00 00 00 00 00 ea ff ff 49 c1 e0 06 4d 8d 34 00 49 8b 46 08 <48> 8d 48 ff a8 01 4c 0f 45 f1 4d 8d 6e 08 4c 89 ef e8 3d 30 df 01 RSP: 0018:ffff8880a15afa90 EFLAGS: 00000002 RAX: ffffea0000dfc808 RBX: ffff8880ba032df8 RCX: ffffffff812b6ec0 RDX: 0000000000000000 RSI: ffffffff812b6eca RDI: 0000000000000007 RBP: ffff88813bff0dc0 R08: 00000000010c6680 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: ffff88804319a280 R13: ffff8880a15afb00 R14: ffffea00010c6680 R15: ffff88813bff1a00 FS: 00007fac0e69a8c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fac0bd25018 CR3: 00000000a18f2000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: cache_flusharray mm/slab.c:3474 [inline] ___cache_free+0x27e/0x3a0 mm/slab.c:3532 qlink_free mm/kasan/quarantine.c:147 [inline] qlist_free_all+0x79/0x140 mm/kasan/quarantine.c:166 quarantine_reduce+0x1a9/0x230 mm/kasan/quarantine.c:259 kasan_kmalloc+0xa2/0x160 mm/kasan/kasan.c:538 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc mm/slab.c:3397 [inline] kmem_cache_alloc+0x110/0x370 mm/slab.c:3557 prepare_creds+0x39/0x510 kernel/cred.c:255 do_faccessat+0x94/0x7a0 fs/open.c:359 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fac0d9559c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007fffecaadf78 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007fffecab0fa0 RCX: 00007fac0d9559c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055b1c159f9a3 RBP: 00007fffecaae0c0 R08: 000055b1c15953e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 000055b1c1fc28a0 R15: 00007fffecaae5b0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 4c 8b 23 mov (%rbx),%r12 5: 4c 89 e7 mov %r12,%rdi 8: e8 70 72 93 ff callq 0xff93727d d: 48 c1 e8 0c shr $0xc,%rax 11: 49 89 c0 mov %rax,%r8 14: 48 b8 00 00 00 00 00 movabs $0xffffea0000000000,%rax 1b: ea ff ff 1e: 49 c1 e0 06 shl $0x6,%r8 22: 4d 8d 34 00 lea (%r8,%rax,1),%r14 26: 49 8b 46 08 mov 0x8(%r14),%rax * 2a: 48 8d 48 ff lea -0x1(%rax),%rcx <-- trapping instruction 2e: a8 01 test $0x1,%al 30: 4c 0f 45 f1 cmovne %rcx,%r14 34: 4d 8d 6e 08 lea 0x8(%r14),%r13 38: 4c 89 ef mov %r13,%rdi 3b: e8 3d 30 df 01 callq 0x1df307d