INFO: task syz-executor.5:10713 blocked for more than 143 seconds. Not tainted 5.12.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27224 pid:10713 ppid: 8415 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5075 schedule+0x14b/0x200 kernel/sched/core.c:5154 io_uring_cancel_files fs/io_uring.c:8699 [inline] io_uring_cancel_task_requests+0x15e4/0x1900 fs/io_uring.c:8730 __io_uring_files_cancel+0xe7/0x170 fs/io_uring.c:8816 io_uring_files_cancel include/linux/io_uring.h:47 [inline] do_exit+0x258/0x2340 kernel/exit.c:780 do_group_exit+0x168/0x2d0 kernel/exit.c:922 get_signal+0x1734/0x1ef0 kernel/signal.c:2773 arch_do_signal_or_restart+0x3c/0x610 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0xac/0x1e0 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x48/0x180 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465f69 RSP: 002b:00007f0c21d2d188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000000302 RBX: 000000000056c0b0 RCX: 0000000000465f69 RDX: 0000000000000000 RSI: 0000000000000302 RDI: 0000000000000004 RBP: 00000000004bfa8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007fff48c8126f R14: 00007f0c21d2d300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1617: #0: ffffffff8c70fe00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 2 locks held by kworker/u4:5/3294: #0: ffff8880b9d34c58 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x82e/0xb00 kernel/sched/fair.c:10633 #1: ffffffff8c70fe00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by in:imklog/8092: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1617 Comm: khungtaskd Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x176/0x24e lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xce9/0xd30 kernel/hung_task.c:294 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4814 Comm: systemd-journal Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0x2e9f/0x5e60 kernel/locking/lockdep.c:4878 Code: 4c 24 60 80 e1 07 80 c1 03 38 c1 0f 8c 14 dc ff ff 48 8b 7c 24 60 e8 20 22 60 00 48 ba 00 00 00 00 00 fc ff df e9 fb db ff ff <48> c7 c1 40 7b f9 8f 80 e1 07 80 c1 03 38 c1 0f 8c d5 de ff ff 48 RSP: 0018:ffffc9000153fc90 EFLAGS: 00000002 RAX: 1ffffffff1ff2f04 RBX: ffff8880118edcc0 RCX: ffffffff815c1d36 RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000 RBP: ffffc9000153fe40 R08: dffffc0000000000 R09: fffffbfff1f28ca9 R10: fffffbfff1f28ca9 R11: 0000000000000000 R12: ffff8880118edcf0 R13: ffffffffffffffff R14: ffff8880118ed340 R15: ffff8880118edcd0 FS: 00007f04254c58c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f04228f4000 CR3: 0000000026c4c000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x126/0x650 kernel/locking/lockdep.c:5510 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:267 rcu_read_lock include/linux/rcupdate.h:656 [inline] __task_pid_nr_ns+0x27/0x3e0 kernel/pid.c:497 task_tgid_vnr include/linux/sched.h:1473 [inline] __do_sys_getpid+0x1a/0x20 kernel/sys.c:907 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f042475df17 Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 RSP: 002b:00007ffca52af678 EFLAGS: 00000202 ORIG_RAX: 0000000000000027 RAX: ffffffffffffffda RBX: 0000564e713071e0 RCX: 00007f042475df17 RDX: 0000000000000000 RSI: 00007ffca52af790 RDI: 0000564e713071e0 RBP: 00007ffca52af790 R08: cdb8c0228e109fb3 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000012ce R13: 00007ffca52af738 R14: 00007ffca52af790 R15: 00007ffca52afd28