INFO: task syz-executor.1:12014 blocked for more than 143 seconds. Not tainted 5.12.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28320 pid:12014 ppid: 8413 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 schedule_timeout+0x1db/0x250 kernel/time/timer.c:1868 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+0x168/0x270 kernel/sched/completion.c:138 io_sq_thread_park fs/io_uring.c:7115 [inline] io_sq_thread_park+0xd5/0x130 fs/io_uring.c:7103 io_uring_cancel_task_requests+0x24c/0xd90 fs/io_uring.c:8745 __io_uring_files_cancel+0x110/0x230 fs/io_uring.c:8840 io_uring_files_cancel include/linux/io_uring.h:47 [inline] do_exit+0x299/0x2a60 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x42c/0x2100 kernel/signal.c:2773 arch_do_signal_or_restart+0x2a8/0x1eb0 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+0x148/0x250 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007f9046bd5108 EFLAGS: 00000202 ORIG_RAX: 00000000000001a9 RAX: 0000000000000003 RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: 0000000020000000 RSI: 0000000020000000 RDI: 000000000000483a RBP: 0000000020000000 R08: 00000000200000c0 R09: 00000000200000c0 R10: 0000000020000080 R11: 0000000000000202 R12: 00000000200000c0 R13: 0000000020000000 R14: 0000000020000080 R15: 0000000020000000 INFO: task iou-sqp-12014:12016 blocked for more than 143 seconds. Not tainted 5.12.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:iou-sqp-12014 state:D stack:30296 pid:12016 ppid: 8413 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 schedule_timeout+0x1db/0x250 kernel/time/timer.c:1868 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+0x168/0x270 kernel/sched/completion.c:138 io_sq_thread+0x27d/0x1ae0 fs/io_uring.c:6717 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task iou-sqp-12014:12021 blocked for more than 143 seconds. Not tainted 5.12.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:iou-sqp-12014 state:D stack:30296 pid:12021 ppid: 8413 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 schedule_timeout+0x1db/0x250 kernel/time/timer.c:1868 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+0x168/0x270 kernel/sched/completion.c:138 io_sq_thread+0x27d/0x1ae0 fs/io_uring.c:6717 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Showing all locks held in the system: 3 locks held by kworker/u4:4/161: #0: ffff8880b9d35258 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x789/0xe50 kernel/sched/fair.c:10633 #1: ffffc90001077da8 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250 #2: ffff8880b9d241d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5a/0x1f0 kernel/time/timer.c:944 1 lock held by khungtaskd/1650: #0: ffffffff8bf74120 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327 1 lock held by in:imklog/8097: 1 lock held by syz-executor.1/12014: #0: ffff888018f2b070 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park+0x5d/0x130 fs/io_uring.c:7108 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1650 Comm: khungtaskd Not tainted 5.12.0-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:79 [inline] dump_stack+0xfa/0x151 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 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+0xd48/0xfb0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4837 Comm: systemd-journal Not tainted 5.12.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_region_inline mm/kasan/generic.c:166 [inline] RIP: 0010:kasan_check_range+0x0/0x180 mm/kasan/generic.c:186 Code: 00 00 e9 f3 e3 29 02 0f 1f 00 48 89 f2 be f5 00 00 00 e9 e3 e3 29 02 0f 1f 00 48 89 f2 be f8 00 00 00 e9 d3 e3 29 02 0f 1f 00 <48> 85 f6 0f 84 70 01 00 00 49 89 f9 41 54 44 0f b6 c2 49 01 f1 55 RSP: 0018:ffffc90001947a98 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888015218500 RCX: ffffffff81c284fd RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888015218500 RBP: 0000000000008042 R08: 0000000043736564 R09: 0000000000000000 R10: ffffffff81c284b0 R11: 0000000000000000 R12: ffff88801c9bed40 R13: 0000000000000000 R14: 0000000000000000 R15: 00000000ffffff9c FS: 00007f42eed578c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f42ec199000 CR3: 000000001522e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_inc include/asm-generic/atomic-instrumented.h:240 [inline] get_new_cred include/linux/cred.h:230 [inline] get_cred include/linux/cred.h:254 [inline] __alloc_file+0x9d/0x280 fs/file_table.c:105 alloc_empty_file+0x6d/0x170 fs/file_table.c:150 path_openat+0xe3/0x27e0 fs/namei.c:3484 do_filp_open+0x17e/0x3c0 fs/namei.c:3525 do_sys_openat2+0x16d/0x420 fs/open.c:1187 do_sys_open fs/open.c:1203 [inline] __do_sys_open fs/open.c:1211 [inline] __se_sys_open fs/open.c:1207 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1207 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f42ee2e6840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffe284d18c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffe284d1bd0 RCX: 00007f42ee2e6840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000560783a12280 RBP: 000000000000000d R08: 00000000000001e0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000560783a04060 R14: 00007ffe284d1b90 R15: 0000560783a120a0