INFO: task khugepaged:1650 blocked for more than 143 seconds. Not tainted 5.12.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:khugepaged state:D stack:23808 pid: 1650 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 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 __flush_work+0x527/0xac0 kernel/workqueue.c:3052 __lru_add_drain_all+0x3fd/0x760 mm/swap.c:842 khugepaged_do_scan mm/khugepaged.c:2202 [inline] khugepaged+0x10f/0x5530 mm/khugepaged.c:2263 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task kworker/u4:8:13442 blocked for more than 143 seconds. Not tainted 5.12.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:8 state:D stack:24344 pid:13442 ppid: 2 flags:0x00004000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 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 __synchronize_srcu+0x1a6/0x280 kernel/rcu/srcutree.c:935 fsnotify_mark_destroy_workfn+0xfd/0x340 fs/notify/mark.c:832 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task kworker/u4:17:13477 blocked for more than 144 seconds. Not tainted 5.12.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:17 state:D stack:24328 pid:13477 ppid: 2 flags:0x00004000 Workqueue: events_unbound fsnotify_connector_destroy_workfn Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 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 __synchronize_srcu+0x1a6/0x280 kernel/rcu/srcutree.c:935 fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:164 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task syz-executor.2:13260 blocked for more than 144 seconds. Not tainted 5.12.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:29368 pid:13260 ppid: 15325 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 synchronize_rcu_expedited+0x453/0x620 kernel/rcu/tree_exp.h:853 synchronize_rcu+0xdf/0x180 kernel/rcu/tree.c:3787 account_event kernel/events/core.c:11393 [inline] perf_event_alloc.part.0+0x33d4/0x3b50 kernel/events/core.c:11618 perf_event_alloc kernel/events/core.c:11938 [inline] __do_sys_perf_event_open+0x4ad/0x2df0 kernel/events/core.c:12036 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007fa3cd2f8188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffcf14b8b9f R14: 00007fa3cd2f8300 R15: 0000000000022000 INFO: task syz-executor.1:13288 blocked for more than 145 seconds. Not tainted 5.12.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29168 pid:13288 ppid: 8479 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5285 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 account_event kernel/events/core.c:11385 [inline] perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11618 perf_event_alloc kernel/events/core.c:11938 [inline] __do_sys_perf_event_open+0x4ad/0x2df0 kernel/events/core.c:12036 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f633e36b188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665d9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffecd6a6eef R14: 00007f633e36b300 R15: 0000000000022000 INFO: task syz-executor.1:13290 blocked for more than 145 seconds. Not tainted 5.12.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:26552 pid:13290 ppid: 8479 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5285 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] synchronize_rcu_expedited+0x27e/0x620 kernel/rcu/tree_exp.h:837 synchronize_rcu+0xdf/0x180 kernel/rcu/tree.c:3787 rcu_sync_enter+0x147/0x2e0 kernel/rcu/sync.c:149 percpu_down_write+0x9d/0x440 kernel/locking/percpu-rwsem.c:220 ext4_ind_migrate+0x237/0x840 fs/ext4/migrate.c:623 ext4_ioctl_setflags fs/ext4/ioctl.c:456 [inline] ext4_fileattr_set+0x14c8/0x1940 fs/ext4/ioctl.c:763 vfs_fileattr_set+0x7fb/0xb60 fs/ioctl.c:895 ioctl_fssetxattr fs/ioctl.c:957 [inline] do_vfs_ioctl+0xe71/0x15d0 fs/ioctl.c:1044 __do_sys_ioctl fs/ioctl.c:1067 [inline] __se_sys_ioctl fs/ioctl.c:1055 [inline] __x64_sys_ioctl+0x108/0x200 fs/ioctl.c:1055 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f633e34a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 00000000004665d9 RDX: 0000000000400019 RSI: 0000000040086602 RDI: 0000000000000005 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffecd6a6eef R14: 00007f633e34a300 R15: 0000000000022000 INFO: task syz-executor.1:13291 blocked for more than 146 seconds. Not tainted 5.12.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29592 pid:13291 ppid: 8479 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5285 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 account_event kernel/events/core.c:11385 [inline] perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11618 perf_event_alloc kernel/events/core.c:11938 [inline] __do_sys_perf_event_open+0x4ad/0x2df0 kernel/events/core.c:12036 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f633e329188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 00000000004665d9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007ffecd6a6eef R14: 00007f633e329300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/0:2/8: 1 lock held by khungtaskd/1636: #0: ffffffff8bf79760 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6333 1 lock held by khugepaged/1650: #0: ffffffff8c05a688 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x65/0x760 mm/swap.c:791 1 lock held by in:imklog/8156: #0: ffff8880155ca870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 3 locks held by kworker/1:4/8993: 2 locks held by kworker/u4:8/13442: #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246 #1: ffffc90001edfda8 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250 2 locks held by kworker/u4:17/13477: #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246 #1: ffffc900029afda8 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250 2 locks held by syz-executor.2/13260: #0: ffffffff8c042da8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11385 [inline] #0: ffffffff8c042da8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11618 #1: ffffffff8bf82968 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8bf82968 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fa/0x620 kernel/rcu/tree_exp.h:837 1 lock held by syz-executor.1/13288: #0: ffffffff8c042da8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11385 [inline] #0: ffffffff8c042da8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11618 4 locks held by syz-executor.1/13290: #0: ffff888028dae460 (sb_writers#5){.+.+}-{0:0}, at: ioctl_setflags fs/ioctl.c:924 [inline] #0: ffff888028dae460 (sb_writers#5){.+.+}-{0:0}, at: do_vfs_ioctl+0xe36/0x15d0 fs/ioctl.c:1038 #1: ffff8880aff32c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline] #1: ffff8880aff32c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_fileattr_set+0x148/0xb60 fs/ioctl.c:880 #2: ffff888028db0b40 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_ind_migrate+0x237/0x840 fs/ext4/migrate.c:623 #3: ffffffff8bf82968 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #3: ffffffff8bf82968 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x27e/0x620 kernel/rcu/tree_exp.h:837 1 lock held by syz-executor.1/13291: #0: ffffffff8c042da8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11385 [inline] #0: ffffffff8c042da8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11618 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1636 Comm: khungtaskd Not tainted 5.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 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:313 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: 13463 Comm: kworker/u4:15 Not tainted 5.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_tt_purge RIP: 0010:kasan_check_range+0x17/0x180 mm/kasan/generic.c:185 Code: 0f 1f 00 48 89 f2 be f8 00 00 00 e9 e3 98 33 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 53 <0f> 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86 05 RSP: 0018:ffffc9000271fbf0 EFLAGS: 00000286 RAX: 0000000000000001 RBX: 1ffff920004e3f83 RCX: ffffffff815adb40 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc9000271fc38 RBP: ffff888064972e40 R08: 0000000000000001 R09: ffffc9000271fc3c R10: ffffed100c92e5c8 R11: 0000000000000000 R12: ffff888064972e48 R13: ffff888064972e50 R14: ffff88801880dd00 R15: 00000000000000b9 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff4d0c61000 CR3: 0000000027bbb000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:706 [inline] queued_spin_lock include/asm-generic/qspinlock.h:82 [inline] do_raw_spin_lock+0x120/0x2b0 kernel/locking/spinlock_debug.c:113 spin_lock_bh include/linux/spinlock.h:359 [inline] batadv_tt_global_purge net/batman-adv/translation-table.c:2301 [inline] batadv_tt_purge+0x123/0xaf0 net/batman-adv/translation-table.c:3592 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294