INFO: task syz-executor.3:11325 blocked for more than 143 seconds. Not tainted 5.6.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28352 11325 7299 0x00004004 Call Trace: schedule+0xd0/0x2a0 kernel/sched/core.c:4154 schedule_timeout+0x6db/0xba0 kernel/time/timer.c:1871 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x26a/0x3c0 kernel/sched/completion.c:136 __flush_work+0x4f0/0xa70 kernel/workqueue.c:3043 __cancel_work_timer+0x3a2/0x500 kernel/workqueue.c:3130 tls_sk_proto_close+0x4a9/0xaf0 net/tls/tls_main.c:305 inet_release+0xe4/0x1f0 net/ipv4/af_inet.c:427 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:470 __sock_release+0xcd/0x280 net/socket.c:605 sock_close+0x18/0x20 net/socket.c:1283 __fput+0x2da/0x850 fs/file_table.c:280 task_work_run+0x13f/0x1b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x2fa/0x360 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath arch/x86/entry/common.c:278 [inline] do_syscall_64+0x6b1/0x7d0 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4163e1 Code: Bad RIP value. RSP: 002b:00007ffe2e1990c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00000000004163e1 RDX: 0000000000000000 RSI: 0000000000001a5e RDI: 0000000000000005 RBP: 0000000000000001 R08: 00000000c2e43a5e R09: 00000000c2e43a62 R10: 00007ffe2e1991a0 R11: 0000000000000293 R12: 000000000076c900 R13: 000000000076c900 R14: 0000000000042661 R15: 000000000076bfac Showing all locks held in the system: 1 lock held by khungtaskd/1134: #0: ffffffff899accc0 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5331 3 locks held by kworker/1:3/2831: #0: ffff8880aa026d28 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8880aa026d28 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa026d28 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8880aa026d28 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8880aa026d28 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880aa026d28 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880aa026d28 ((wq_completion)events){+.+.}, at: process_one_work+0x82a/0x1690 kernel/workqueue.c:2237 #1: ffffc9000825fdd0 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}, at: process_one_work+0x85e/0x1690 kernel/workqueue.c:2241 #2: ffff88809fb020d0 (&ctx->tx_lock){+.+.}, at: tx_work_handler+0x127/0x190 net/tls/tls_sw.c:2209 1 lock held by in:imklog/6642: #0: ffff8880a794bae0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 fs/file.c:826 1 lock held by syz-executor.3/11325: #0: ffff88808602f740 (&sb->s_type->i_mutex_key#14){+.+.}, at: inode_lock include/linux/fs.h:792 [inline] #0: ffff88808602f740 (&sb->s_type->i_mutex_key#14){+.+.}, at: __sock_release+0x86/0x280 net/socket.c:604 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1134 Comm: khungtaskd Not tainted 5.6.0-rc7-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+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xa8c/0x1010 kernel/hung_task.c:289 kthread+0x357/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 55 Comm: kworker/u4:2 Not tainted 5.6.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:check_preemption_disabled lib/smp_processor_id.c:14 [inline] RIP: 0010:debug_smp_processor_id+0x8/0x185 lib/smp_processor_id.c:57 Code: 1b fe e9 e3 fe ff ff 48 c7 c7 84 02 86 8a e8 9f d6 1b fe eb 87 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 41 54 53 e8 c8 01 df fd <65> 44 8b 25 b0 86 6e 7c 65 8b 1d d1 f1 6e 7c 81 e3 ff ff ff 7f 31 RSP: 0018:ffffc90000ef7cb0 EFLAGS: 00000293 RAX: ffff8880a91be100 RBX: 0000000000038300 RCX: ffffffff87a49a8d RDX: 0000000000000000 RSI: ffffffff83932ca8 RDI: 0000000000000001 RBP: ffff88805be14b80 R08: ffff8880a91be100 R09: ffffed1015ce707c R10: ffffed1015ce707b R11: ffff8880ae7383db R12: 0000000000000001 R13: 0000000000000104 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f70bad32000 CR3: 00000000a608e000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_dynticks_curr_cpu_in_eqs+0x12/0xb0 kernel/rcu/tree.c:299 rcu_is_watching+0xc/0x20 kernel/rcu/tree.c:919 rcu_read_unlock include/linux/rcupdate.h:651 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:411 [inline] batadv_nc_worker+0x47b/0x760 net/batman-adv/network-coding.c:718 process_one_work+0x94b/0x1690 kernel/workqueue.c:2266 worker_thread+0x96/0xe20 kernel/workqueue.c:2412 kthread+0x357/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352