INFO: task syz-executor.3:10030 can't die for more than 143 seconds. task:syz-executor.3 state:D stack:28352 pid:10030 ppid: 8450 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_finish+0x96/0x580 fs/io_uring.c:7152 io_sq_offload_create fs/io_uring.c:7929 [inline] io_uring_create fs/io_uring.c:9465 [inline] io_uring_setup+0x1fb2/0x2c20 fs/io_uring.c:9550 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007fe833770108 EFLAGS: 00000202 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: 0000000020ff9000 RSI: 00000000200005c0 RDI: 0000000000006aec RBP: 00000000200005c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000020ff9000 R14: 0000000000000000 R15: 0000000020ff9000 INFO: task syz-executor.3:10030 blocked for more than 143 seconds. Not tainted 5.11.0-next-20210225-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28352 pid:10030 ppid: 8450 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_finish+0x96/0x580 fs/io_uring.c:7152 io_sq_offload_create fs/io_uring.c:7929 [inline] io_uring_create fs/io_uring.c:9465 [inline] io_uring_setup+0x1fb2/0x2c20 fs/io_uring.c:9550 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007fe833770108 EFLAGS: 00000202 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: 0000000020ff9000 RSI: 00000000200005c0 RDI: 0000000000006aec RBP: 00000000200005c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000020ff9000 R14: 0000000000000000 R15: 0000000020ff9000 INFO: task iou-sqp-10030:10058 can't die for more than 143 seconds. task:iou-sqp-10030 state:D stack:30296 pid:10058 ppid: 8450 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/0x19a0 fs/io_uring.c:6731 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task iou-sqp-10030:10058 blocked for more than 143 seconds. Not tainted 5.11.0-next-20210225-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:iou-sqp-10030 state:D stack:30296 pid:10058 ppid: 8450 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/0x19a0 fs/io_uring.c:6731 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Showing all locks held in the system: 1 lock held by khungtaskd/1661: #0: ffffffff8bf744e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327 3 locks held by in:imklog/8131: #0: ffff88802cde2d70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:961 #1: ffffffff8bf744e0 (rcu_read_lock){....}-{1:2}, at: double_lock_hb kernel/futex.c:1573 [inline] #1: ffffffff8bf744e0 (rcu_read_lock){....}-{1:2}, at: futex_wake_op kernel/futex.c:1706 [inline] #1: ffffffff8bf744e0 (rcu_read_lock){....}-{1:2}, at: do_futex+0x55b/0x1710 kernel/futex.c:3746 #2: ffffffff8c0a7680 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}, at: fs_reclaim_acquire+0xb2/0x150 mm/page_alloc.c:4361 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1661 Comm: khungtaskd Not tainted 5.11.0-next-20210225-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:147 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline] watchdog+0xd8e/0xf40 kernel/hung_task.c:338 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: 8132 Comm: rs:main Q:Reg Not tainted 5.11.0-next-20210225-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:53 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:177 [inline] RIP: 0010:kasan_check_range+0x44/0x180 mm/kasan/generic.c:186 Code: 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86 05 01 00 00 49 83 e9 01 48 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 ca <48> c1 ed 03 49 c1 ea 03 48 01 c5 49 01 c2 48 89 e8 49 8d 5a 01 48 RSP: 0018:ffffc9000bd375e0 EFLAGS: 00000082 RAX: dffffc0000000000 RBX: 1ffff920017a6ec7 RCX: ffffffff8158acaf RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fabd900 RBP: ffffffff8fabd900 R08: 0000000000000000 R09: ffffffff8fabd907 R10: ffffffff8fabd907 R11: 0000000000000000 R12: 0000000000000006 R13: ffff8880274ea598 R14: 0000000000000525 R15: ffff8880274ea5b8 FS: 00007f2cdfb2b700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5d05627018 CR3: 0000000027e62000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] hlock_class kernel/locking/lockdep.c:198 [inline] mark_lock+0xef/0x17b0 kernel/locking/lockdep.c:4456 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4079 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4105 [inline] lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4165 [inline] lockdep_hardirqs_on_prepare+0x28b/0x400 kernel/locking/lockdep.c:4117 trace_hardirqs_on+0x5b/0x1c0 kernel/trace/trace_preemptirq.c:49 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x28/0x50 kernel/locking/spinlock.c:191 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] __wake_up_common_lock+0xde/0x130 kernel/sched/wait.c:140 stop_this_handle+0x464/0x560 fs/jbd2/transaction.c:737 jbd2_journal_stop+0xaca/0xf40 fs/jbd2/transaction.c:1907 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:127 ext4_dirty_inode+0xe8/0x110 fs/ext4/inode.c:5948 __mark_inode_dirty+0x6e3/0x10f0 fs/fs-writeback.c:2274 generic_update_time+0x21d/0x350 fs/inode.c:1766 update_time fs/inode.c:1779 [inline] file_update_time+0x434/0x520 fs/inode.c:1995 file_modified fs/inode.c:2018 [inline] file_modified+0x7d/0xa0 fs/inode.c:2003 ext4_write_checks fs/ext4/file.c:247 [inline] ext4_buffered_write_iter+0xff/0x4d0 fs/ext4/file.c:264 ext4_file_write_iter+0x423/0x14e0 fs/ext4/file.c:663 call_write_iter include/linux/fs.h:1977 [inline] new_sync_write+0x426/0x650 fs/read_write.c:519 vfs_write+0x796/0xa30 fs/read_write.c:606 ksys_write+0x12d/0x250 fs/read_write.c:659 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f2ce256f1cd Code: c2 20 00 00 75 10 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ae fc ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 f7 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f2cdfb2a590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f2cd4023a40 RCX: 00007f2ce256f1cd RDX: 0000000000000521 RSI: 00007f2cd4023a40 RDI: 0000000000000006 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f2cd40237c0 R13: 00007f2cdfb2a5b0 R14: 000055fc4ecb6360 R15: 0000000000000521