INFO: task kworker/R-mm_pe:13 blocked for more than 143 seconds. Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/R-mm_pe state:D stack:29328 pid:13 tgid:13 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 rescuer_thread+0x3ed/0x10a0 kernel/workqueue.c:3471 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task kworker/1:0:25 blocked for more than 144 seconds. Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:23608 pid:25 tgid:25 ppid:2 flags:0x00004000 Workqueue: 0x0 (events_power_efficient) Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 create_worker+0x491/0x720 kernel/workqueue.c:2811 maybe_create_worker kernel/workqueue.c:3054 [inline] manage_workers kernel/workqueue.c:3106 [inline] worker_thread+0x318/0xd30 kernel/workqueue.c:3366 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task kworker/R-wg-cr:5261 blocked for more than 144 seconds. Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/R-wg-cr state:D stack:26712 pid:5261 tgid:5261 ppid:2 flags:0x00004000 Workqueue: 0x0 (wg-crypt-wg0) Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 worker_detach_from_pool kernel/workqueue.c:2727 [inline] rescuer_thread+0xaf5/0x10a0 kernel/workqueue.c:3526 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task kworker/R-wg-cr:5263 blocked for more than 145 seconds. Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/R-wg-cr state:D stack:26976 pid:5263 tgid:5263 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 rescuer_thread+0x3ed/0x10a0 kernel/workqueue.c:3471 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task kworker/R-wg-cr:5274 blocked for more than 145 seconds. Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/R-wg-cr state:D stack:27248 pid:5274 tgid:5274 ppid:2 flags:0x00004000 Workqueue: 0x0 (wg-crypt-wg0) Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 worker_detach_from_pool kernel/workqueue.c:2727 [inline] rescuer_thread+0xaf5/0x10a0 kernel/workqueue.c:3526 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task kworker/1:6:5447 blocked for more than 145 seconds. Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:6 state:D stack:30096 pid:5447 tgid:5447 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 kthread+0x23b/0x390 kernel/kthread.c:382 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Showing all locks held in the system: 1 lock held by kworker/u8:0/11: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 1 lock held by kworker/R-mm_pe/13: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 1 lock held by kworker/1:0/25: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 1 lock held by khungtaskd/30: #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720 2 locks held by kworker/u8:2/35: 3 locks held by kworker/1:1/46: 3 locks held by kworker/u8:3/52: #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc90000bd7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000bd7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcc4f50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:580 5 locks held by kworker/1:2/938: 2 locks held by getty/4981: #0: ffff88814c9100a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 1 lock held by kworker/R-bond0/5256: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xfbf/0x10a0 kernel/workqueue.c:3535 1 lock held by kworker/R-wg-cr/5261: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2727 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xaf5/0x10a0 kernel/workqueue.c:3526 1 lock held by kworker/R-wg-cr/5262: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 1 lock held by kworker/R-wg-cr/5263: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 1 lock held by kworker/R-wg-cr/5267: 1 lock held by kworker/R-wg-cr/5269: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2727 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xaf5/0x10a0 kernel/workqueue.c:3526 1 lock held by kworker/R-wg-cr/5270: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 1 lock held by kworker/R-wg-cr/5271: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 1 lock held by kworker/R-wg-cr/5272: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 1 lock held by kworker/R-wg-cr/5273: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 1 lock held by kworker/R-wg-cr/5274: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2727 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xaf5/0x10a0 kernel/workqueue.c:3526 1 lock held by kworker/R-wg-cr/5276: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2727 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xaf5/0x10a0 kernel/workqueue.c:3526 1 lock held by kworker/R-wg-cr/5277: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 1 lock held by kworker/R-wg-cr/5278: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 1 lock held by kworker/R-wg-cr/5279: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2669 3 locks held by kworker/1:3/5282: 7 locks held by kworker/1:5/5295: 1 lock held by syz.1.9/5303: #0: ffffffff8e93d240 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4562 1 lock held by syz.4.57/5414: #0: ffffffff8e93d240 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4562 4 locks held by syz-executor/5472: #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679 #1: ffff88805b3e4488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #2: ffff888020b52c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #3: ffffffff8f56fb28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 4 locks held by syz-executor/5475: #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679 #1: ffff88807a36ac88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #2: ffff888020b52c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #3: ffffffff8f56fb28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 4 locks held by syz-executor/5481: #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679 #1: ffff88807bce8088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #2: ffff888020b52c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #3: ffffffff8f56fb28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 4 locks held by syz-executor/5482: #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679 #1: ffff88807a36a888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #2: ffff888020b52c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #3: ffffffff8f56fb28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 7 locks held by syz-executor/5484: #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679 #1: ffff888031884488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #2: ffff888020b52c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #3: ffffffff8f56fb28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 #4: ffff888030d8d0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #4: ffff888030d8d0e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline] #4: ffff888030d8d0e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293 #5: ffff888030d8e250 (&devlink->lock_key#3){+.+.}-{3:3}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1672 #6: ffffffff8e93d240 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4562 1 lock held by kworker/R-bond0/5504: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-bond0/5505: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-bond0/5506: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-bond0/5507: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-bond0/5513: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5515: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5529: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5532: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5533: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5534: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5535: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5538: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5539: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5543: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5544: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5547: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5553: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5556: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5557: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5558: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 4 locks held by syz-executor/5664: #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679 #1: ffff88807ad7fc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #2: ffff888020b52c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #3: ffffffff8f56fb28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 1 lock held by kworker/R-bond0/5667: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5669: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5670: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5671: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 4 locks held by syz-executor/5684: #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679 #1: ffff8880a7ff9088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #2: ffff888020b52c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #3: ffffffff8f56fb28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 1 lock held by kworker/R-bond0/5690: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5698: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5699: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5701: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 4 locks held by syz-executor/5713: #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679 #1: ffff888048e48488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #2: ffff888020b52c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #3: ffffffff8f56fb28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 4 locks held by syz-executor/5715: #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679 #1: ffff88802279a888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #2: ffff888020b52c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #3: ffffffff8f56fb28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 4 locks held by syz-executor/5717: #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff88807ad08420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679 #1: ffff888048e4c888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #2: ffff888020b52c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #3: ffffffff8f56fb28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 1 lock held by kworker/R-bond0/5730: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-bond0/5732: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-bond0/5733: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5743: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5744: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5747: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5749: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5750: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5753: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5754: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5758: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 1 lock held by kworker/R-wg-cr/5759: #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: set_pf_worker kernel/workqueue.c:3316 [inline] #0: ffffffff8e7e23a8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: rescuer_thread+0xd0/0x10a0 kernel/workqueue.c:3443 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 938 Comm: kworker/1:2 Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events nsim_dev_trap_report_work RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:406 [inline] RIP: 0010:unwind_next_frame+0xcb1/0x22d0 arch/x86/kernel/unwind_orc.c:585 Code: 0c 00 00 4c 39 f0 0f 87 74 0c 00 00 4c 89 ef e8 a5 22 00 00 49 89 c6 48 bd 00 00 00 00 00 fc ff df 48 8b 44 24 30 80 3c 28 00 <48> 8b 5c 24 18 74 08 48 89 df e8 20 26 bd 00 4c 89 33 48 8b 44 24 RSP: 0018:ffffc90000a17530 EFLAGS: 00000246 RAX: 1ffff92000142ec9 RBX: ffffc90000a17610 RCX: 1ffff92000142ec0 RDX: ffffffff9128983e RSI: 0000000000000002 RDI: ffffc90000a185f8 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffc90000a176f0 R10: ffffc90000a17650 R11: ffffffff81809000 R12: ffffc90000a19000 R13: ffffc90000a185f8 R14: ffffffff89efdf98 R15: 1ffff92000142ec2 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000f72818e0 CR3: 000000000e734000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4295 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] ref_tracker_alloc+0x14b/0x490 lib/ref_tracker.c:203 __netdev_tracker_alloc include/linux/netdevice.h:4050 [inline] netdev_hold include/linux/netdevice.h:4079 [inline] dst_init+0xee/0x490 net/core/dst.c:52 dst_alloc+0x14f/0x190 net/core/dst.c:93 rt_dst_alloc net/ipv4/route.c:1612 [inline] __mkroute_output net/ipv4/route.c:2573 [inline] ip_route_output_key_hash_rcu+0x13cc/0x2390 net/ipv4/route.c:2795 ip_route_output_key_hash+0x193/0x2b0 net/ipv4/route.c:2624 __ip_route_output_key include/net/route.h:141 [inline] ip_route_output_flow+0x29/0x140 net/ipv4/route.c:2852 ip_route_output_key include/net/route.h:151 [inline] ip_route_me_harder+0x80d/0x1300 net/ipv4/netfilter.c:53 synproxy_send_tcp+0x356/0x6c0 net/netfilter/nf_synproxy_core.c:431 synproxy_send_client_synack+0x8b8/0xf30 net/netfilter/nf_synproxy_core.c:484 nft_synproxy_eval_v4+0x3ca/0x610 net/netfilter/nft_synproxy.c:59 nft_synproxy_do_eval+0x362/0xa60 net/netfilter/nft_synproxy.c:141 expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline] nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288 nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5666 [inline] __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5779 process_backlog+0x662/0x15b0 net/core/dev.c:6111 __napi_poll+0xcb/0x490 net/core/dev.c:6775 napi_poll net/core/dev.c:6844 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:6966 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 spin_unlock_bh include/linux/spinlock.h:396 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline] nsim_dev_trap_report_work+0x75d/0xaa0 drivers/net/netdevsim/dev.c:850 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244