INFO: task syz-executor.3:32506 blocked for more than 143 seconds. Not tainted 5.15.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27624 pid:32506 ppid: 6848 flags:0x00024004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x176/0x280 kernel/sched/completion.c:138 io_wq_exit_workers fs/io-wq.c:1176 [inline] io_wq_put_and_exit+0x4b2/0xd20 fs/io-wq.c:1211 io_uring_clean_tctx fs/io_uring.c:9675 [inline] io_uring_cancel_generic+0x5fe/0x740 fs/io_uring.c:9755 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x265/0x2a30 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x47f/0x2160 kernel/signal.c:2868 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865 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:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f152d718739 RSP: 002b:00007f152ac4d188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000000142 RBX: 00007f152d81d0f0 RCX: 00007f152d718739 RDX: 0000000000000000 RSI: 0000000000006b46 RDI: 0000000000000006 RBP: 00007f152d772cc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f152d81d0f0 R13: 00007f152dd50b1f R14: 00007f152ac4d300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8b97fe20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/6244: #0: ffff88801a02eff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 2 locks held by kworker/u4:7/29674: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.15.0-rc1-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+0x3e5/0x4d0 kernel/kthread.c:319 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: 8 Comm: kworker/u4:0 Not tainted 5.15.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet RIP: 0010:batadv_forw_packet_queue+0x0/0x310 net/batman-adv/send.c:672 Code: f8 e9 73 fe ff ff 48 8b 7c 24 18 e8 da c5 e9 f8 e9 8a fc ff ff 48 8b 7c 24 18 e8 5b c5 e9 f8 e9 44 fb ff ff cc cc cc cc cc cc <41> 57 41 56 41 55 49 89 cd 41 54 49 89 f4 55 48 89 d5 53 48 89 fb RSP: 0018:ffffc90000cd7b30 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff88807ef28050 RCX: 000000010001a693 RDX: ffff8880369e0cd8 RSI: ffff8880369e0cf8 RDI: ffff88807ef28000 RBP: ffff8880369e0c80 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff81652e07 R11: 0000000000000000 R12: ffff88807ef28000 R13: ffff88807ef28048 R14: 0000000000000001 R15: ffff88807ebef04e FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0fec436000 CR3: 000000000b68e000 CR4: 00000000001526f0 Call Trace: batadv_iv_ogm_aggregate_new+0x3f9/0x4e0 net/batman-adv/bat_iv_ogm.c:588 batadv_iv_ogm_queue_add net/batman-adv/bat_iv_ogm.c:671 [inline] batadv_iv_ogm_schedule_buff+0x990/0x1430 net/batman-adv/bat_iv_ogm.c:834 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:869 [inline] batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:862 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x740/0x8e0 net/batman-adv/bat_iv_ogm.c:1713 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: f8 clc 1: e9 73 fe ff ff jmpq 0xfffffe79 6: 48 8b 7c 24 18 mov 0x18(%rsp),%rdi b: e8 da c5 e9 f8 callq 0xf8e9c5ea 10: e9 8a fc ff ff jmpq 0xfffffc9f 15: 48 8b 7c 24 18 mov 0x18(%rsp),%rdi 1a: e8 5b c5 e9 f8 callq 0xf8e9c57a 1f: e9 44 fb ff ff jmpq 0xfffffb68 24: cc int3 25: cc int3 26: cc int3 27: cc int3 28: cc int3 29: cc int3 * 2a: 41 57 push %r15 <-- trapping instruction 2c: 41 56 push %r14 2e: 41 55 push %r13 30: 49 89 cd mov %rcx,%r13 33: 41 54 push %r12 35: 49 89 f4 mov %rsi,%r12 38: 55 push %rbp 39: 48 89 d5 mov %rdx,%rbp 3c: 53 push %rbx 3d: 48 89 fb mov %rdi,%rbx