INFO: task syz-executor.0:16541 blocked for more than 143 seconds. Not tainted 5.18.0-rc1-syzkaller-00037-g42e7a03d3bad #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27600 pid:16541 ppid: 3649 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5073 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6382 schedule+0xd2/0x1f0 kernel/sched/core.c:6454 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 io_wq_exit_workers fs/io-wq.c:1266 [inline] io_wq_put_and_exit+0x4d6/0xe40 fs/io-wq.c:1301 io_uring_clean_tctx fs/io_uring.c:10599 [inline] io_uring_cancel_generic+0x60b/0x695 fs/io_uring.c:10669 io_uring_files_cancel include/linux/io_uring.h:18 [inline] do_exit+0x4f9/0x2a00 kernel/exit.c:750 do_group_exit+0xd2/0x2f0 kernel/exit.c:925 get_signal+0x22df/0x24c0 kernel/signal.c:2864 arch_do_signal_or_restart+0x82/0x20f0 arch/x86/kernel/signal.c:867 exit_to_user_mode_loop kernel/entry/common.c:166 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fced9e89049 RSP: 002b:00007fcedafe2218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fced9f9bf68 RCX: 00007fced9e89049 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fced9f9bf68 RBP: 00007fced9f9bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fced9f9bf6c R13: 00007fceda4cfb1f R14: 00007fcedafe2300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/28: #0: ffffffff8bd81ee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6467 2 locks held by getty/3274: #0: ffff88814cad8098 (&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+0xcea/0x1230 drivers/tty/n_tty.c:2075 2 locks held by kworker/u4:17/14937: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.18.0-rc1-syzkaller-00037-g42e7a03d3bad #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:212 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:369 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5540 Comm: kworker/u4:12 Not tainted 5.18.0-rc1-syzkaller-00037-g42e7a03d3bad #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+0xa/0x170 lib/smp_processor_id.c:13 Code: f8 65 48 8b 3c 25 00 70 02 00 e8 01 0f fa f7 eb 99 0f 1f 44 00 00 0f 0b e9 23 ff ff ff cc cc cc 41 56 41 55 49 89 f5 41 54 55 <48> 89 fd 53 0f 1f 44 00 00 65 44 8b 25 a5 64 a2 76 65 8b 1d 8e ba RSP: 0018:ffffc900032bfb98 EFLAGS: 00000046 RAX: 0000000000000002 RBX: e47a7ea22345a5b5 RCX: ffffc900032bfc10 RDX: 1ffff1100f05b14a RSI: ffffffff89cc5b20 RDI: ffffffff8a26b7e0 RBP: 1ffff92000657f7a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002 R13: ffffffff89cc5b20 R14: ffff8880782d8a58 R15: ffff8880782d8000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f15d0b226c8 CR3: 000000000ba8e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lockdep_recursion_finish kernel/locking/lockdep.c:436 [inline] lock_release+0x3bb/0x720 kernel/locking/lockdep.c:5663 rcu_lock_release include/linux/rcupdate.h:273 [inline] rcu_read_unlock include/linux/rcupdate.h:727 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x86b/0xfa0 net/batman-adv/network-coding.c:719 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 ---------------- Code disassembly (best guess): 0: f8 clc 1: 65 48 8b 3c 25 00 70 mov %gs:0x27000,%rdi 8: 02 00 a: e8 01 0f fa f7 callq 0xf7fa0f10 f: eb 99 jmp 0xffffffaa 11: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 16: 0f 0b ud2 18: e9 23 ff ff ff jmpq 0xffffff40 1d: cc int3 1e: cc int3 1f: cc int3 20: 41 56 push %r14 22: 41 55 push %r13 24: 49 89 f5 mov %rsi,%r13 27: 41 54 push %r12 29: 55 push %rbp * 2a: 48 89 fd mov %rdi,%rbp <-- trapping instruction 2d: 53 push %rbx 2e: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 33: 65 44 8b 25 a5 64 a2 mov %gs:0x76a264a5(%rip),%r12d # 0x76a264e0 3a: 76 3b: 65 gs 3c: 8b .byte 0x8b 3d: 1d .byte 0x1d 3e: 8e .byte 0x8e 3f: ba .byte 0xba