INFO: task syz-executor.3:3282 blocked for more than 143 seconds. Not tainted 5.15.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28592 pid: 3282 ppid: 32227 flags:0x00024004 Call Trace: context_switch kernel/sched/core.c:4969 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6250 schedule+0xd2/0x260 kernel/sched/core.c:6323 io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9850 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x263/0x2a20 kernel/exit.c:781 do_group_exit+0x125/0x310 kernel/exit.c:923 get_signal+0x47d/0x21d0 kernel/signal.c:2855 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f7237be9ae9 RSP: 002b:00007f723511d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f7237cfd0e8 RCX: 00007f7237be9ae9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f7237cfd0e8 RBP: 00007f7237cfd0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7237cfd0ec R13: 00007ffc06a0229f R14: 00007f723511d300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8b9838e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/6153: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 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+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 935 Comm: kworker/u4:4 Not tainted 5.15.0-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_release+0xe/0x720 kernel/locking/lockdep.c:5633 Code: fe ff ff 48 c7 c7 a8 7e 6f 8d e8 1d 65 61 00 e9 6d fd ff ff 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 <41> 55 41 54 49 89 fc 55 53 48 81 ec 90 00 00 00 48 8d 6c 24 10 48 RSP: 0018:ffffc900047efc78 EFLAGS: 00000293 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff88801ad53a00 RSI: ffffffff88d48949 RDI: ffffffff8b9838e0 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff88d48941 R11: 0000000000000000 R12: ffffc900047efdb0 R13: 0000000000000000 R14: dffffc0000000000 R15: 00000000000002e3 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4376aed140 CR3: 000000001b7e8000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_release include/linux/rcupdate.h:273 [inline] rcu_read_unlock include/linux/rcupdate.h:721 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:416 [inline] batadv_nc_worker+0x86b/0xfa0 net/batman-adv/network-coding.c:723 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 48 c7 c7 a8 7e 6f 8d mov $0xffffffff8d6f7ea8,%rdi 7: e8 1d 65 61 00 callq 0x616529 c: e9 6d fd ff ff jmpq 0xfffffd7e 11: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 18: 00 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 41 57 push %r15 25: 41 56 push %r14 * 27: 41 55 push %r13 <-- trapping instruction 29: 41 54 push %r12 2b: 49 89 fc mov %rdi,%r12 2e: 55 push %rbp 2f: 53 push %rbx 30: 48 81 ec 90 00 00 00 sub $0x90,%rsp 37: 48 8d 6c 24 10 lea 0x10(%rsp),%rbp 3c: 48 rex.W