wlan1: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge) wlan1: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge) wlan1: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge) INFO: task systemd-udevd:25908 blocked for more than 140 seconds. Not tainted 4.19.172-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D26624 25908 4698 0x00000100 Call Trace: context_switch syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3517 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3561 io_schedule+0xb5/0x120 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:5181 wait_on_page_bit_common syzkaller/managers/linux-4-19/kernel/mm/filemap.c:1123 [inline] wait_on_page_bit+0x2c5/0x3f0 syzkaller/managers/linux-4-19/kernel/mm/filemap.c:1156 wait_on_page_locked syzkaller/managers/linux-4-19/kernel/./include/linux/pagemap.h:530 [inline] wait_on_page_read syzkaller/managers/linux-4-19/kernel/mm/filemap.c:2795 [inline] do_read_cache_page+0x8ed/0x1170 syzkaller/managers/linux-4-19/kernel/mm/filemap.c:2834 read_mapping_page syzkaller/managers/linux-4-19/kernel/./include/linux/pagemap.h:402 [inline] read_dev_sector+0xbf/0x500 syzkaller/managers/linux-4-19/kernel/block/partition-generic.c:671 read_part_sector syzkaller/managers/linux-4-19/kernel/block/partitions/check.h:38 [inline] adfspart_check_ICS+0x114/0xe70 syzkaller/managers/linux-4-19/kernel/block/partitions/acorn.c:366 check_partition+0x390/0x690 syzkaller/managers/linux-4-19/kernel/block/partitions/check.c:167 rescan_partitions+0x1b5/0x970 syzkaller/managers/linux-4-19/kernel/block/partition-generic.c:535 bdev_disk_changed+0x179/0x1b0 syzkaller/managers/linux-4-19/kernel/fs/block_dev.c:1435 __blkdev_get+0x1282/0x1480 syzkaller/managers/linux-4-19/kernel/fs/block_dev.c:1561 blkdev_get+0xb0/0x940 syzkaller/managers/linux-4-19/kernel/fs/block_dev.c:1627 blkdev_open+0x202/0x290 syzkaller/managers/linux-4-19/kernel/fs/block_dev.c:1788 do_dentry_open+0x4aa/0x1160 syzkaller/managers/linux-4-19/kernel/fs/open.c:796 do_last syzkaller/managers/linux-4-19/kernel/fs/namei.c:3421 [inline] path_openat+0x793/0x2df0 syzkaller/managers/linux-4-19/kernel/fs/namei.c:3537 do_filp_open+0x18c/0x3f0 syzkaller/managers/linux-4-19/kernel/fs/namei.c:3567 do_sys_open+0x3b3/0x520 syzkaller/managers/linux-4-19/kernel/fs/open.c:1085 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f1a77374840 Code: Bad RIP value. RSP: 002b:00007ffc0bfc5048 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055c5ce4939d0 RCX: 00007f1a77374840 RDX: 000055c5ce1fefe3 RSI: 00000000000a0800 RDI: 000055c5ce493450 RBP: 00007ffc0bfc51c0 R08: 000055c5ce1fe670 R09: 0000000000000010 R10: 000055c5ce1fed0c R11: 0000000000000246 R12: 00007ffc0bfc5110 R13: 000055c5ce491550 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.1:25920 blocked for more than 140 seconds. Not tainted 4.19.172-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28560 25920 14924 0x00000004 Call Trace: context_switch syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3517 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3619 __mutex_lock_common syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1072 blkdev_put+0x30/0x520 syzkaller/managers/linux-4-19/kernel/fs/block_dev.c:1839 blkdev_close+0x86/0xb0 syzkaller/managers/linux-4-19/kernel/fs/block_dev.c:1888 __fput+0x2ce/0x890 syzkaller/managers/linux-4-19/kernel/fs/file_table.c:278 task_work_run+0x148/0x1c0 syzkaller/managers/linux-4-19/kernel/kernel/task_work.c:113 tracehook_notify_resume syzkaller/managers/linux-4-19/kernel/./include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:167 prepare_exit_to_usermode syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:198 [inline] syscall_return_slowpath syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b09 Code: Bad RIP value. RSP: 002b:00007f6cd1281188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000005 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc232c6a7f R14: 00007f6cd1281300 R15: 0000000000022000 INFO: task syz-executor.1:25932 blocked for more than 140 seconds. Not tainted 4.19.172-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29160 25932 14924 0x00000004 Call Trace: context_switch syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3517 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3619 __mutex_lock_common syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1072 __blkdev_get+0x1d0/0x1480 syzkaller/managers/linux-4-19/kernel/fs/block_dev.c:1478 blkdev_get+0xb0/0x940 syzkaller/managers/linux-4-19/kernel/fs/block_dev.c:1627 blkdev_open+0x202/0x290 syzkaller/managers/linux-4-19/kernel/fs/block_dev.c:1788 do_dentry_open+0x4aa/0x1160 syzkaller/managers/linux-4-19/kernel/fs/open.c:796 do_last syzkaller/managers/linux-4-19/kernel/fs/namei.c:3421 [inline] path_openat+0x793/0x2df0 syzkaller/managers/linux-4-19/kernel/fs/namei.c:3537 do_filp_open+0x18c/0x3f0 syzkaller/managers/linux-4-19/kernel/fs/namei.c:3567 do_sys_open+0x3b3/0x520 syzkaller/managers/linux-4-19/kernel/fs/open.c:1085 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4190f4 Code: Bad RIP value. RSP: 002b:00007f6cd125fcc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004190f4 RDX: 0000000000000000 RSI: 00007f6cd125fd60 RDI: 00000000ffffff9c RBP: 00007f6cd125fd60 R08: 0000000000000000 R09: 002364626e2f7665 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007ffc232c6a7f R14: 00007f6cd1260300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1566: #0: 00000000741693ee (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 syzkaller/managers/linux-4-19/kernel/kernel/locking/lockdep.c:4440 1 lock held by in:imklog/7840: 1 lock held by systemd-udevd/25908: #0: 00000000b886c5b8 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 syzkaller/managers/linux-4-19/kernel/fs/block_dev.c:1478 1 lock held by syz-executor.1/25920: #0: 00000000b886c5b8 (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x30/0x520 syzkaller/managers/linux-4-19/kernel/fs/block_dev.c:1839 1 lock held by syz-executor.1/25932: #0: 00000000b886c5b8 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 syzkaller/managers/linux-4-19/kernel/fs/block_dev.c:1478 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1566 Comm: khungtaskd Not tainted 4.19.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 syzkaller/managers/linux-4-19/kernel/lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 syzkaller/managers/linux-4-19/kernel/lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace syzkaller/managers/linux-4-19/kernel/./include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks syzkaller/managers/linux-4-19/kernel/kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 syzkaller/managers/linux-4-19/kernel/kernel/hung_task.c:287 kthread+0x33f/0x460 syzkaller/managers/linux-4-19/kernel/kernel/kthread.c:259 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 37 Comm: kworker/u4:3 Not tainted 4.19.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_purge_orig RIP: 0010:arch_local_save_flags syzkaller/managers/linux-4-19/kernel/./arch/x86/include/asm/paravirt.h:784 [inline] RIP: 0010:arch_local_irq_save syzkaller/managers/linux-4-19/kernel/./arch/x86/include/asm/paravirt.h:806 [inline] RIP: 0010:lock_release+0xd2/0x8b0 syzkaller/managers/linux-4-19/kernel/kernel/locking/lockdep.c:3922 Code: f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 c3 06 00 00 48 83 3d 66 54 a6 08 00 0f 84 1b 05 00 00 9c 58 <0f> 1f 44 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 04 24 48 c7 c0 RSP: 0018:ffff8880b5177b68 EFLAGS: 00000286 RAX: 0000000000000286 RBX: ffff8880b5168300 RCX: ffffffff814bc19b RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8880b5168b84 RBP: ffff8880511ab6e0 R08: 0000000000000001 R09: ffffed100a2356d9 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff11016a2ef70 R13: ffffffff87d69a2c R14: dffffc0000000000 R15: 0000000000000327 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f227ff0c020 CR3: 00000000a48de000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_bh syzkaller/managers/linux-4-19/kernel/./include/linux/spinlock_api_smp.h:174 [inline] _raw_spin_unlock_bh+0x17/0x30 syzkaller/managers/linux-4-19/kernel/kernel/locking/spinlock.c:200 spin_unlock_bh syzkaller/managers/linux-4-19/kernel/./include/linux/spinlock.h:374 [inline] batadv_purge_orig_ref+0xa2c/0x1110 syzkaller/managers/linux-4-19/kernel/net/batman-adv/originator.c:1379 batadv_purge_orig+0x17/0x60 syzkaller/managers/linux-4-19/kernel/net/batman-adv/originator.c:1392 process_one_work+0x864/0x1570 syzkaller/managers/linux-4-19/kernel/kernel/workqueue.c:2155 worker_thread+0x64c/0x1130 syzkaller/managers/linux-4-19/kernel/kernel/workqueue.c:2298 kthread+0x33f/0x460 syzkaller/managers/linux-4-19/kernel/kernel/kthread.c:259 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:415