INFO: task syz-executor.1:29959 can't die for more than 143 seconds. task:syz-executor.1 state:R running task stack:25096 pid:29959 ppid: 28811 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8eb/0x21b0 kernel/sched/core.c:5078 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline] run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline] sysvec_apic_timer_interrupt+0xbd/0x100 arch/x86/kernel/apic/apic.c:1096 INFO: task syz-executor.3:29967 can't die for more than 145 seconds. task:syz-executor.3 state:R running task stack:25128 pid:29967 ppid: 28808 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8eb/0x21b0 kernel/sched/core.c:5078 blk_schedule_flush_plug include/linux/blkdev.h:1277 [inline] io_schedule_prepare kernel/sched/core.c:6820 [inline] io_schedule_timeout+0x140/0x140 kernel/sched/core.c:6839 irqentry_exit_cond_resched kernel/entry/common.c:393 [inline] irqentry_exit_cond_resched kernel/entry/common.c:385 [inline] irqentry_exit+0x7a/0xa0 kernel/entry/common.c:423 Showing all locks held in the system: 2 locks held by kworker/u4:1/25: 1 lock held by khungtaskd/1657: #0: ffffffff8b793ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x28c kernel/locking/lockdep.c:6254 4 locks held by kworker/u4:5/3065: #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2246 #1: ffffc90001ce7da8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2250 #2: ffffffff8d09fc10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb10 net/core/net_namespace.c:566 #3: ffffffff8d0ba9e8 (rtnl_mutex){+.+.}-{3:3}, at: cangw_pernet_exit+0xe/0x20 net/can/gw.c:1241 1 lock held by in:imklog/8168: #0: ffff888017cc99f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:949 2 locks held by kworker/1:7/10900: 3 locks held by kworker/0:7/13662: #0: ffff888010862d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010862d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888010862d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888010862d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888010862d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888010862d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2246 #1: ffffc900025c7da8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2250 #2: ffffffff8d0ba9e8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:250 6 locks held by kworker/0:0/28450: #0: ffff8880b9c34c58 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1318 [inline] #0: ffff8880b9c34c58 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x235/0x21b0 kernel/sched/core.c:4995 #1: ffff8880b9c20088 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 kernel/sched/psi.c:833 #2: ffff8880b9c246b0 (krc.lock){..-.}-{2:2}, at: kfree_rcu_monitor+0x15/0x90 kernel/rcu/tree.c:3362 #3: ffff8880b9c20088 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 kernel/sched/psi.c:833 #4: ffffffff8fa73880 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:656 #5: ffff8880109a7138 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] #5: ffff8880109a7138 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: __get_locked_pte+0x2d1/0x4f0 mm/memory.c:1623 1 lock held by syz-executor.4/29806: #0: ffffffff8d0ba9e8 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0x927/0xdf0 net/core/dev.c:10344 1 lock held by syz-executor.2/29841: #0: ffffffff8d0ba9e8 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0x927/0xdf0 net/core/dev.c:10344 2 locks held by syz-executor.5/29894: #0: ffffffff8d0ba9e8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:676 [inline] #0: ffffffff8d0ba9e8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3a/0x1a0 drivers/net/tun.c:3354 #1: ffffffff8b79dfe8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8b79dfe8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4ff/0x620 kernel/rcu/tree_exp.h:836 2 locks held by syz-executor.1/29959: 2 locks held by syz-executor.3/29967: 1 lock held by syz-executor.0/30025: #0: ffffffff8d0ba9e8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:676 [inline] #0: ffffffff8d0ba9e8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3a/0x1a0 drivers/net/tun.c:3354 =============================================