INFO: task syz-executor.5:17578 blocked for more than 143 seconds. Not tainted 5.16.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:24152 pid:17578 ppid: 3640 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x971/0x10e0 kernel/sched/core.c:6296 schedule+0x12b/0x1f0 kernel/sched/core.c:6369 perf_event_free_task+0x585/0x6c0 kernel/events/core.c:12868 copy_process+0x4730/0x59e0 kernel/fork.c:2432 kernel_clone+0x22a/0x7e0 kernel/fork.c:2556 __do_sys_clone3 kernel/fork.c:2831 [inline] __se_sys_clone3+0x38e/0x440 kernel/fork.c:2815 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f75006caeb9 RSP: 002b:00007f74fefdd168 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f75007de1d0 RCX: 00007f75006caeb9 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00000000200003c0 RBP: 00007f750072508d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe4db1d34f R14: 00007f74fefdd300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8cb1e300 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 3 locks held by klogd/2965: #0: ffff8880b9a39858 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xc6/0x110 kernel/sched/core.c:497 #1: ffffffff8cb1e300 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:267 #2: ffff88807d998998 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0x9f/0xd20 kernel/sched/core.c:4017 2 locks held by getty/3290: #0: ffff88814ad82098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2077 3 locks held by kworker/u4:19/6367: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-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+0x1dc/0x2d8 lib/dump_stack.c:106 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc82/0xcd0 kernel/hung_task.c:295 kthread+0x468/0x490 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 6478 Comm: kworker/u4:22 Not tainted 5.16.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_acquire+0x203/0x2b00 kernel/locking/lockdep.c:4937 Code: 24 88 00 00 00 0f 84 45 01 00 00 83 fb 31 0f 83 56 23 00 00 48 8d 04 9b 4c 8d bc c7 58 0a 00 00 4c 89 fb 48 c1 eb 03 8a 04 33 <84> c0 0f 85 1b 1e 00 00 48 83 7d 10 00 0f 84 fd 00 00 00 45 8b 27 RSP: 0018:ffffc90002f9f900 EFLAGS: 00000806 RAX: 0000000000000000 RBX: 1ffff1100c8bb895 RCX: 0000000000000000 RDX: 0000000000000028 RSI: dffffc0000000000 RDI: ffff8880645dba00 RBP: ffffc90002f9fa50 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff1c00976 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000002 R14: 0000000000000028 R15: ffff8880645dc4a8 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c008ea3248 CR3: 000000000c88e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5639 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:268 rcu_read_lock include/linux/rcupdate.h:694 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0xc8/0x5b0 net/batman-adv/network-coding.c:719 process_one_work+0x850/0x1130 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x468/0x490 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 ---------------- Code disassembly (best guess): 0: 24 88 and $0x88,%al 2: 00 00 add %al,(%rax) 4: 00 0f add %cl,(%rdi) 6: 84 45 01 test %al,0x1(%rbp) 9: 00 00 add %al,(%rax) b: 83 fb 31 cmp $0x31,%ebx e: 0f 83 56 23 00 00 jae 0x236a 14: 48 8d 04 9b lea (%rbx,%rbx,4),%rax 18: 4c 8d bc c7 58 0a 00 lea 0xa58(%rdi,%rax,8),%r15 1f: 00 20: 4c 89 fb mov %r15,%rbx 23: 48 c1 eb 03 shr $0x3,%rbx 27: 8a 04 33 mov (%rbx,%rsi,1),%al * 2a: 84 c0 test %al,%al <-- trapping instruction 2c: 0f 85 1b 1e 00 00 jne 0x1e4d 32: 48 83 7d 10 00 cmpq $0x0,0x10(%rbp) 37: 0f 84 fd 00 00 00 je 0x13a 3d: 45 8b 27 mov (%r15),%r12d