INFO: task syz-executor.0:6479 blocked for more than 143 seconds.
Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:0 pid:6479 tgid:6478 ppid:6154 flags:0x0000000d
Call trace:
__switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x1498/0x24b4 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xb8/0x19c kernel/sched/core.c:6817
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874
__mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684
__mutex_lock kernel/locking/mutex.c:752 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
nbd_start_device_ioctl drivers/block/nbd.c:1444 [inline]
__nbd_ioctl drivers/block/nbd.c:1504 [inline]
nbd_ioctl+0x8d8/0xc38 drivers/block/nbd.c:1544
blkdev_ioctl+0x3e4/0xae4 block/ioctl.c:634
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857
__invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
INFO: task syz-executor.0:6482 blocked for more than 143 seconds.
Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:0 pid:6482 tgid:6478 ppid:6154 flags:0x00000005
Call trace:
__switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x1498/0x24b4 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xb8/0x19c kernel/sched/core.c:6817
blk_mq_freeze_queue_wait+0xf4/0x174 block/blk-mq.c:139
blk_freeze_queue+0xc8/0x104 block/blk-mq.c:166
blk_mq_freeze_queue+0x20/0x30 block/blk-mq.c:175
nbd_add_socket+0x174/0x770 drivers/block/nbd.c:1144
__nbd_ioctl drivers/block/nbd.c:1487 [inline]
nbd_ioctl+0x210/0xc38 drivers/block/nbd.c:1544
blkdev_ioctl+0x3e4/0xae4 block/ioctl.c:634
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857
__invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
INFO: task syz-executor.0:6484 blocked for more than 143 seconds.
Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:0 pid:6484 tgid:6478 ppid:6154 flags:0x00000005
Call trace:
__switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x1498/0x24b4 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xb8/0x19c kernel/sched/core.c:6817
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874
__mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684
__mutex_lock kernel/locking/mutex.c:752 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
bdev_open_by_dev+0x180/0x7ec block/bdev.c:859
blkdev_open+0x134/0x33c block/fops.c:615
do_dentry_open+0x778/0x12b4 fs/open.c:953
vfs_open+0x7c/0x90 fs/open.c:1087
do_open fs/namei.c:3645 [inline]
path_openat+0x1f6c/0x2830 fs/namei.c:3802
do_filp_open+0x1bc/0x3cc fs/namei.c:3829
do_sys_openat2+0x124/0x1b8 fs/open.c:1404
do_sys_open fs/open.c:1419 [inline]
__do_sys_openat fs/open.c:1435 [inline]
__se_sys_openat fs/open.c:1430 [inline]
__arm64_sys_openat+0x1f0/0x240 fs/open.c:1430
__invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
INFO: task syz-executor.0:6492 blocked for more than 143 seconds.
Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:0 pid:6492 tgid:6478 ppid:6154 flags:0x00000005
Call trace:
__switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x1498/0x24b4 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xb8/0x19c kernel/sched/core.c:6817
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874
__mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684
__mutex_lock kernel/locking/mutex.c:752 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
nbd_ioctl+0x128/0xc38 drivers/block/nbd.c:1537
blkdev_ioctl+0x3e4/0xae4 block/ioctl.c:634
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857
__invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
INFO: task syz-executor.0:6496 blocked for more than 143 seconds.
Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:0 pid:6496 tgid:6478 ppid:6154 flags:0x00000005
Call trace:
__switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x1498/0x24b4 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xb8/0x19c kernel/sched/core.c:6817
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874
__mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684
__mutex_lock kernel/locking/mutex.c:752 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
nbd_ioctl+0x128/0xc38 drivers/block/nbd.c:1537
blkdev_ioctl+0x3e4/0xae4 block/ioctl.c:634
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857
__invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
INFO: task syz-executor.0:6513 blocked for more than 143 seconds.
Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:0 pid:6513 tgid:6478 ppid:6154 flags:0x00000005
Call trace:
__switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x1498/0x24b4 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xb8/0x19c kernel/sched/core.c:6817
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874
__mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684
__mutex_lock kernel/locking/mutex.c:752 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
nbd_ioctl+0x128/0xc38 drivers/block/nbd.c:1537
blkdev_ioctl+0x3e4/0xae4 block/ioctl.c:634
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857
__invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffff80008ee74ac0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:297
3 locks held by kworker/0:2/2156:
#0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2606
#1: ffff80009c7b7c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2608
#2: ffff0000d598e240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x32bc drivers/net/netdevsim/fib.c:1489
2 locks held by getty/5922:
#0: ffff0000d1e190a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
#1: ffff800093ff02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201
1 lock held by udevd/6137:
#0: ffff0000c9fab4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859
3 locks held by kworker/1:3/6199:
#0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2606
#1: ffff800098207c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2608
#2: ffff0000ed7d9240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x32bc drivers/net/netdevsim/fib.c:1489
1 lock held by syz-executor.0/6479:
#0: ffff0000c9f0e198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_start_device_ioctl drivers/block/nbd.c:1444 [inline]
#0: ffff0000c9f0e198 (&nbd->config_lock){+.+.}-{3:3}, at: __nbd_ioctl drivers/block/nbd.c:1504 [inline]
#0: ffff0000c9f0e198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x8d8/0xc38 drivers/block/nbd.c:1544
1 lock held by syz-executor.0/6482:
#0: ffff0000c9f0e198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x128/0xc38 drivers/block/nbd.c:1537
1 lock held by syz-executor.0/6484:
#0: ffff0000c9fab4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859
1 lock held by syz-executor.0/6492:
#0:
ffff0000c9f0e198
(&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x128/0xc38 drivers/block/nbd.c:1537
1 lock held by syz-executor.0/6496:
#0:
ffff0000c9f0e198
(
&nbd->config_lock
){+.+.}-{3:3}
, at: nbd_ioctl+0x128/0xc38 drivers/block/nbd.c:1537
1 lock held by syz-executor.0/6513:
#0: ffff0000c9f0e198 (&nbd->config_lock){+.+.}-{3:3}
, at: nbd_ioctl+0x128/0xc38 drivers/block/nbd.c:1537
2 locks held by syz-executor.3/7026:
#0:
ffff0000f0a880e0 (&type->s_umount_key#64/1){+.+.}-{3:3}, at: alloc_super+0x1b0/0x83c fs/super.c:343
#1: ffff0000c9fab4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859
1 lock held by syz-executor.2/7275:
#0: ffff0000d7ce8420 (sb_writers#4){.+.+}-{0:0}, at: direct_splice_actor+0x54/0x1d8 fs/splice.c:1163
1 lock held by syz-executor.0/8441:
#0: ffff0000c9fab4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859
5 locks held by syz-executor.4/8587:
#0: ffff0000d5d98420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2794 [inline]
#0: ffff0000d5d98420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x368/0xc3c fs/read_write.c:586
#1: ffff0000f4bd2888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:325
#2: ffff80008ee9dd68 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock include/linux/cgroup.h:368 [inline]
#2: ffff80008ee9dd68 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_kn_lock_live+0xf8/0x258 kernel/cgroup/cgroup.c:1662
#3: ffff80008ed13590 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2413 [inline]
#3: ffff80008ed13590 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_procs_write_start+0x198/0x5f0 kernel/cgroup/cgroup.c:2917
#4: ffff80008ee9df50 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2415 [inline]
#4: ffff80008ee9df50 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_procs_write_start+0x1ac/0x5f0 kernel/cgroup/cgroup.c:2917
3 locks held by syz-executor.0/8595:
#0: ffff80009194f2e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffff80009194f2e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x704/0xdbc net/core/rtnetlink.c:6614
#1: ffff0000ed35d408 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_open+0x20c/0x424 drivers/net/wireguard/device.c:50
#2: ffff80008ee7a3f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#2: ffff80008ee7a3f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3ac/0x728 kernel/rcu/tree_exp.h:995
2 locks held by syz-executor.2/8793:
=============================================