INFO: task syz-executor.2:13331 blocked for more than 143 seconds. Not tainted 5.18.0-rc6-syzkaller-00161-gbc403203d65a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:26256 pid:13331 ppid: 11778 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5073 [inline] __schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388 schedule+0xd2/0x1f0 kernel/sched/core.c:6460 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1860 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:10391 [inline] io_uring_cancel_generic+0x538/0x5bc fs/io_uring.c:10461 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: 0033:0x7ff6294890e9 RSP: 002b:00007ff62a549218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007ff62959c038 RCX: 00007ff6294890e9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff62959c038 RBP: 00007ff62959c030 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff62959c03c R13: 00007ffd8631420f R14: 00007ff62a549300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/28: #0: ffffffff8bd7f5e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6467 2 locks held by getty/3276: #0: ffff888018a4e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90001bf92e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcea/0x1230 drivers/tty/n_tty.c:2075 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.18.0-rc6-syzkaller-00161-gbc403203d65a #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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 51 Comm: kworker/u4:2 Not tainted 5.18.0-rc6-syzkaller-00161-gbc403203d65a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline] RIP: 0010:lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4275 [inline] RIP: 0010:lockdep_hardirqs_on_prepare+0x195/0x400 kernel/locking/lockdep.c:4246 Code: 0f 01 00 00 48 c7 c7 00 47 cc 89 e8 65 c5 10 08 b8 ff ff ff ff 65 0f c1 05 70 03 a6 7e 83 f8 01 0f 85 ff 00 00 00 5b 5d c3 9c <58> f6 c4 02 0f 85 59 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 RSP: 0018:ffffc90000dcfbc0 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffffffff905c0940 RCX: 1ffffffff1b72301 RDX: 0000000000000004 RSI: ffffffff817ebe41 RDI: ffffffff8146fdd0 RBP: ffffffff8146fdd0 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff817ebe28 R11: 0000000000000000 R12: ffff88802663d828 R13: ffff88802663cd00 R14: dffffc0000000000 R15: ffffffff890776c0 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005653557f0068 CR3: 000000001dc68000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_hardirqs_on+0x5b/0x1c0 kernel/trace/trace_preemptirq.c:49 __local_bh_enable_ip+0xa0/0x120 kernel/softirq.c:388 spin_unlock_bh include/linux/spinlock.h:394 [inline] batadv_nc_purge_paths+0x2a5/0x3a0 net/batman-adv/network-coding.c:471 batadv_nc_worker+0x8f9/0xfa0 net/batman-adv/network-coding.c:720 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), 2 bytes skipped: 0: 00 00 add %al,(%rax) 2: 48 c7 c7 00 47 cc 89 mov $0xffffffff89cc4700,%rdi 9: e8 65 c5 10 08 callq 0x810c573 e: b8 ff ff ff ff mov $0xffffffff,%eax 13: 65 0f c1 05 70 03 a6 xadd %eax,%gs:0x7ea60370(%rip) # 0x7ea6038b 1a: 7e 1b: 83 f8 01 cmp $0x1,%eax 1e: 0f 85 ff 00 00 00 jne 0x123 24: 5b pop %rbx 25: 5d pop %rbp 26: c3 retq 27: 9c pushfq * 28: 58 pop %rax <-- trapping instruction 29: f6 c4 02 test $0x2,%ah 2c: 0f 85 59 01 00 00 jne 0x18b 32: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 39: fc ff df 3c: 48 rex.W 3d: 89 .byte 0x89