INFO: task syz-executor207:3645 can't die for more than 143 seconds. task:syz-executor207 state:D stack:23712 pid: 3645 ppid: 3624 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5106 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6415 schedule+0xd2/0x1f0 kernel/sched/core.c:6487 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x373/0x530 kernel/sched/completion.c:106 __flush_work+0x56c/0xb10 kernel/workqueue.c:3075 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3162 tls_sk_proto_close+0x4a7/0xaf0 net/tls/tls_main.c:307 inet_release+0x12e/0x280 net/ipv4/af_inet.c:428 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:481 __sock_release+0xcd/0x280 net/socket.c:650 sock_close+0x18/0x20 net/socket.c:1318 __fput+0x286/0x9f0 fs/file_table.c:317 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:183 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:215 __syscall_exit_to_user_mode_work kernel/entry/common.c:297 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:308 do_syscall_64+0x42/0x80 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fb517232753 RSP: 002b:00007ffd5aec8f98 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007fb517232753 RDX: fffffffffffffe60 RSI: 00000000200005c0 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000000 R09: fffffffffffffe60 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd5aec8fb0 R13: 00000000000f4240 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor207:3645 blocked for more than 143 seconds. Not tainted 5.17.0-next-20220324-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor207 state:D stack:23712 pid: 3645 ppid: 3624 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5106 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6415 schedule+0xd2/0x1f0 kernel/sched/core.c:6487 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x373/0x530 kernel/sched/completion.c:106 __flush_work+0x56c/0xb10 kernel/workqueue.c:3075 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3162 tls_sk_proto_close+0x4a7/0xaf0 net/tls/tls_main.c:307 inet_release+0x12e/0x280 net/ipv4/af_inet.c:428 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:481 __sock_release+0xcd/0x280 net/socket.c:650 sock_close+0x18/0x20 net/socket.c:1318 __fput+0x286/0x9f0 fs/file_table.c:317 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:183 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:215 __syscall_exit_to_user_mode_work kernel/entry/common.c:297 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:308 do_syscall_64+0x42/0x80 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fb517232753 RSP: 002b:00007ffd5aec8f98 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007fb517232753 RDX: fffffffffffffe60 RSI: 00000000200005c0 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000000 R09: fffffffffffffe60 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd5aec8fb0 R13: 00000000000f4240 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/28: #0: ffffffff8bd821a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6498 2 locks held by getty/3275: #0: ffff88801da23098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90002e732e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2075 3 locks held by kworker/0:1/3632: #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc90003a1fda8 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff8880775250d8 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x127/0x190 net/tls/tls_sw.c:2300 1 lock held by syz-executor207/3645: #0: ffff888072703810 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:778 [inline] #0: ffff888072703810 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:649 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.17.0-next-20220324-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:256 [inline] watchdog+0xcb7/0xed0 kernel/hung_task.c:413 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3630 Comm: kworker/u4:2 Not tainted 5.17.0-next-20220324-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:__text_poke+0x490/0x8c0 arch/x86/kernel/alternative.c:1063 Code: f8 0f 23 c0 0f 23 c8 0f 23 d0 0f 23 d8 e8 d8 d7 98 00 48 8b 34 24 4c 89 ea 48 8b 7c 24 10 48 03 3d 4d 81 4e 0a e8 a0 fd 98 00 9b d7 98 00 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 RSP: 0018:ffffc900039ff9e0 EFLAGS: 00000002 RAX: 00002aaaaaaab7ba RBX: ffffffff8db6e16c RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff8f20852f RDI: 00002aaaaaaab7be RBP: ffff88814012e558 R08: 0000000000000001 R09: 00002aaaaaaab7be R10: fffffbfff1e410a5 R11: 000000000000003f R12: ffffffff81c3e7ba R13: 0000000000000004 R14: 00000000000007be R15: ffffffff8beb8700 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d1b4b77ba8 CR3: 0000000010ea4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: text_poke arch/x86/kernel/alternative.c:1121 [inline] text_poke_bp_batch+0x375/0x6b0 arch/x86/kernel/alternative.c:1385 text_poke_flush arch/x86/kernel/alternative.c:1542 [inline] text_poke_flush arch/x86/kernel/alternative.c:1539 [inline] text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1549 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146 jump_label_update+0x32f/0x410 kernel/jump_label.c:830 static_key_disable_cpuslocked+0x152/0x1b0 kernel/jump_label.c:207 static_key_disable+0x16/0x20 kernel/jump_label.c:215 toggle_allocation_gate mm/kfence/core.c:793 [inline] toggle_allocation_gate+0x183/0x390 mm/kfence/core.c:771 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.233 msecs ---------------- Code disassembly (best guess): 0: f8 clc 1: 0f 23 c0 mov %rax,%db0 4: 0f 23 c8 mov %rax,%db1 7: 0f 23 d0 mov %rax,%db2 a: 0f 23 d8 mov %rax,%db3 d: e8 d8 d7 98 00 callq 0x98d7ea 12: 48 8b 34 24 mov (%rsp),%rsi 16: 4c 89 ea mov %r13,%rdx 19: 48 8b 7c 24 10 mov 0x10(%rsp),%rdi 1e: 48 03 3d 4d 81 4e 0a add 0xa4e814d(%rip),%rdi # 0xa4e8172 25: e8 a0 fd 98 00 callq 0x98fdca * 2a: e8 9b d7 98 00 callq 0x98d7ca <-- trapping instruction 2f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 36: fc ff df 39: 48 89 ea mov %rbp,%rdx 3c: 48 c1 ea 03 shr $0x3,%rdx