INFO: task khugepaged:1650 blocked for more than 143 seconds. Not tainted 5.13.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:khugepaged state:D stack:23968 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:3053 __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 syz-executor.0:2114 blocked for more than 143 seconds. Not tainted 5.13.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29592 pid: 2114 ppid: 14328 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:11386 [inline] perf_event_alloc.part.0+0x33d4/0x3b50 kernel/events/core.c:11611 perf_event_alloc kernel/events/core.c:11931 [inline] __do_sys_perf_event_open+0x4ad/0x2df0 kernel/events/core.c:12029 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007fe1894d0188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd2e293fff R14: 00007fe1894d0300 R15: 0000000000022000 INFO: task syz-executor.2:2113 blocked for more than 144 seconds. Not tainted 5.13.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:26776 pid: 2113 ppid: 8448 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:1036 [inline] __mutex_lock+0x7d4/0x10c0 kernel/locking/mutex.c:1104 account_event kernel/events/core.c:11378 [inline] perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11611 perf_event_alloc kernel/events/core.c:11931 [inline] __do_sys_perf_event_open+0x4ad/0x2df0 kernel/events/core.c:12029 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f3dc748b188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffed670ae7f R14: 00007f3dc748b300 R15: 0000000000022000 INFO: task syz-executor.3:2117 blocked for more than 144 seconds. Not tainted 5.13.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29592 pid: 2117 ppid: 8450 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:1036 [inline] __mutex_lock+0x7d4/0x10c0 kernel/locking/mutex.c:1104 account_event kernel/events/core.c:11378 [inline] perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11611 perf_event_alloc kernel/events/core.c:11931 [inline] __do_sys_perf_event_open+0x4ad/0x2df0 kernel/events/core.c:12029 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007ff2d0b29188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffc86c64d4f R14: 00007ff2d0b29300 R15: 0000000000022000 INFO: task syz-executor.1:2121 blocked for more than 145 seconds. Not tainted 5.13.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29592 pid: 2121 ppid: 12139 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:1036 [inline] __mutex_lock+0x7d4/0x10c0 kernel/locking/mutex.c:1104 account_event kernel/events/core.c:11378 [inline] perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11611 perf_event_alloc kernel/events/core.c:11931 [inline] __do_sys_perf_event_open+0x4ad/0x2df0 kernel/events/core.c:12029 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f798bfb6188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffc4edeeccf R14: 00007f798bfb6300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/1:0/20: 1 lock held by khungtaskd/1638: #0: ffffffff8bf79320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6333 1 lock held by khugepaged/1650: #0: ffffffff8c05a2c8 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x65/0x760 mm/swap.c:791 2 locks held by kworker/u4:6/3099: #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:617 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2247 #1: ffffc90002547da8 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2251 1 lock held by in:imklog/8132: #0: ffff8880151eaaf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 3 locks held by kworker/0:4/9726: 2 locks held by kworker/u4:19/11808: #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:617 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2247 #1: ffffc9000167fda8 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2251 2 locks held by syz-executor.0/2114: #0: ffffffff8c0429e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11378 [inline] #0: ffffffff8c0429e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11611 #1: ffffffff8bf82528 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8bf82528 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fa/0x620 kernel/rcu/tree_exp.h:837 1 lock held by syz-executor.0/2119: #0: ffffffff8c0429e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11378 [inline] #0: ffffffff8c0429e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11611 1 lock held by syz-executor.2/2113: #0: ffffffff8c0429e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11378 [inline] #0: ffffffff8c0429e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11611 1 lock held by syz-executor.2/2144: #0: ffffffff8c0429e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11378 [inline] #0: ffffffff8c0429e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11611 2 locks held by syz-executor.3/2112: #0: ffff88803888e6d0 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline] #0: ffff88803888e6d0 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:598 #1: ffffffff8bf82528 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #1: ffffffff8bf82528 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x27e/0x620 kernel/rcu/tree_exp.h:837 1 lock held by syz-executor.3/2117: #0: ffffffff8c0429e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11378 [inline] #0: ffffffff8c0429e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11611 1 lock held by syz-executor.1/2118: #0: ffff88803888e190 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline] #0: ffff88803888e190 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:598 1 lock held by syz-executor.1/2121: #0: ffffffff8c0429e8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11378 [inline] #0: ffffffff8c0429e8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x3262/0x3b50 kernel/events/core.c:11611 3 locks held by syz-executor.4/2145: #0: ffff8880294e2460 (sb_writers#5){.+.+}-{0:0}, at: ioctl_setflags fs/ioctl.c:924 [inline] #0: ffff8880294e2460 (sb_writers#5){.+.+}-{0:0}, at: do_vfs_ioctl+0xe36/0x15d0 fs/ioctl.c:1038 #1: ffff88806b742c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline] #1: ffff88806b742c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: vfs_fileattr_set+0x148/0xb60 fs/ioctl.c:880 #2: ffff8880294e4b40 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_ind_migrate+0x237/0x840 fs/ext4/migrate.c:623 2 locks held by syz-executor.4/2157: #0: ffff8880294e2460 (sb_writers#5){.+.+}-{0:0}, at: do_open fs/namei.c:3354 [inline] #0: ffff8880294e2460 (sb_writers#5){.+.+}-{0:0}, at: path_openat+0x1ad9/0x27e0 fs/namei.c:3494 #1: ffff88806b742c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline] #1: ffff88806b742c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: process_measurement+0x6fa/0x17e0 security/integrity/ima/ima_main.c:234 2 locks held by syz-executor.4/2166: #0: ffff8880294e2460 (sb_writers#5){.+.+}-{0:0}, at: do_open fs/namei.c:3354 [inline] #0: ffff8880294e2460 (sb_writers#5){.+.+}-{0:0}, at: path_openat+0x1ad9/0x27e0 fs/namei.c:3494 #1: ffff88806b742c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline] #1: ffff88806b742c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: process_measurement+0x6fa/0x17e0 security/integrity/ima/ima_main.c:234 2 locks held by syz-executor.4/2167: #0: ffff8880294e2460 (sb_writers#5){.+.+}-{0:0}, at: do_open fs/namei.c:3354 [inline] #0: ffff8880294e2460 (sb_writers#5){.+.+}-{0:0}, at: path_openat+0x1ad9/0x27e0 fs/namei.c:3494 #1: ffff88806b742c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline] #1: ffff88806b742c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: process_measurement+0x6fa/0x17e0 security/integrity/ima/ima_main.c:234 2 locks held by syz-executor.4/2176: #0: ffff8880294e2460 (sb_writers#5){.+.+}-{0:0}, at: do_open fs/namei.c:3354 [inline] #0: ffff8880294e2460 (sb_writers#5){.+.+}-{0:0}, at: path_openat+0x1ad9/0x27e0 fs/namei.c:3494 #1: ffff88806b742c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline] #1: ffff88806b742c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: process_measurement+0x6fa/0x17e0 security/integrity/ima/ima_main.c:234 2 locks held by syz-executor.4/2177: #0: ffff8880294e2460 (sb_writers#5){.+.+}-{0:0}, at: do_open fs/namei.c:3354 [inline] #0: ffff8880294e2460 (sb_writers#5){.+.+}-{0:0}, at: path_openat+0x1ad9/0x27e0 fs/namei.c:3494 #1: ffff88806b742c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline] #1: ffff88806b742c68 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: process_measurement+0x6fa/0x17e0 security/integrity/ima/ima_main.c:234 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1638 Comm: khungtaskd Not tainted 5.13.0-rc3-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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 20 Comm: kworker/1:0 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events prog_array_map_clear_deferred RIP: 0010:separate_irq_context kernel/locking/lockdep.c:4430 [inline] RIP: 0010:__lock_acquire+0x1091/0x5230 kernel/locking/lockdep.c:4886 Code: 04 80 4c 8d 6c c7 d8 48 b8 00 00 00 00 00 fc ff df 49 8d 7d 21 48 89 fa 48 c1 ea 03 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 <84> c0 0f 85 ad 34 00 00 48 8d 7d 21 45 0f b6 6d 21 48 b8 00 00 00 RSP: 0018:ffffc90000da7898 EFLAGS: 00000097 RAX: 0000000000000000 RBX: b85a619d4f68ff2e RCX: ffffffff815a30a3 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff888012430a41 RBP: ffff888012430a48 R08: 0000000000000000 R09: ffffffff902269b7 R10: fffffbfff2044d36 R11: 0000000000000000 R12: ffff888012430000 R13: ffff888012430a20 R14: ffff8880124309f8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f98b801bba0 CR3: 000000002c659000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __mutex_lock_common kernel/locking/mutex.c:959 [inline] __mutex_lock+0x139/0x10c0 kernel/locking/mutex.c:1104 fd_array_map_delete_elem+0x120/0x2e0 kernel/bpf/arraymap.c:801 bpf_fd_array_map_clear kernel/bpf/arraymap.c:851 [inline] prog_array_map_clear_deferred+0x10b/0x1b0 kernel/bpf/arraymap.c:1030 process_one_work+0x98d/0x1600 kernel/workqueue.c:2276 worker_thread+0x64c/0x1120 kernel/workqueue.c:2422 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294