INFO: task khugepaged:1660 blocked for more than 143 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:khugepaged state:D stack:23984 pid: 1660 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x951/0x2290 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1854 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+0x163/0x260 kernel/sched/completion.c:138 __flush_work+0x545/0x9d0 kernel/workqueue.c:3052 lru_add_drain_all+0x4a1/0x8b0 mm/swap.c:850 khugepaged_do_scan mm/khugepaged.c:2202 [inline] khugepaged+0x10c/0x5610 mm/khugepaged.c:2263 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task syz-executor.0:8500 blocked for more than 143 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:23648 pid: 8500 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x951/0x2290 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x9e9/0x1240 kernel/locking/mutex.c:1103 xt_find_table_lock+0x41/0x580 net/netfilter/x_tables.c:1206 xt_request_find_table_lock+0x27/0x130 net/netfilter/x_tables.c:1253 get_info+0x16b/0x710 net/ipv6/netfilter/ip6_tables.c:980 do_ipt_get_ctl+0x152/0x9d0 net/ipv4/netfilter/ip_tables.c:1651 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 ip_getsockopt net/ipv4/ip_sockglue.c:1777 [inline] ip_getsockopt+0x164/0x1c0 net/ipv4/ip_sockglue.c:1756 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:4141 __sys_getsockopt+0x208/0x4e0 net/socket.c:2156 __do_sys_getsockopt net/socket.c:2171 [inline] __se_sys_getsockopt net/socket.c:2168 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:2168 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x460d2a RSP: 002b:00007ffc78725cd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffc78725d00 RCX: 0000000000460d2a RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000074ee60 R08: 00007ffc78725cfc R09: 0000000000004000 R10: 00007ffc78725d00 R11: 0000000000000246 R12: 00007ffc78725d60 R13: 0000000000000003 R14: 000000000074cca0 R15: 0000000000000000 INFO: task syz-executor.1:8502 blocked for more than 144 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:23904 pid: 8502 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x951/0x2290 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x9e9/0x1240 kernel/locking/mutex.c:1103 xt_find_table_lock+0x41/0x580 net/netfilter/x_tables.c:1206 xt_request_find_table_lock+0x27/0x130 net/netfilter/x_tables.c:1253 get_info+0x179/0x720 net/ipv4/netfilter/arp_tables.c:807 do_arpt_get_ctl+0x456/0x8f0 net/ipv4/netfilter/arp_tables.c:1441 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 ip_getsockopt net/ipv4/ip_sockglue.c:1777 [inline] ip_getsockopt+0x164/0x1c0 net/ipv4/ip_sockglue.c:1756 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:4141 __sys_getsockopt+0x208/0x4e0 net/socket.c:2156 __do_sys_getsockopt net/socket.c:2171 [inline] __se_sys_getsockopt net/socket.c:2168 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:2168 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x460d2a RSP: 002b:00007ffd7811e9c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffd7811e9e0 RCX: 0000000000460d2a RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007ffd7811e9dc R09: 000000000000000a R10: 00007ffd7811e9e0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000032 R15: 0000000000227d1a INFO: task syz-executor.2:8504 blocked for more than 144 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:23848 pid: 8504 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x951/0x2290 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x9e9/0x1240 kernel/locking/mutex.c:1103 xt_find_table_lock+0x41/0x580 net/netfilter/x_tables.c:1206 xt_request_find_table_lock+0x27/0x130 net/netfilter/x_tables.c:1253 get_info+0x179/0x720 net/ipv4/netfilter/arp_tables.c:807 do_arpt_get_ctl+0x456/0x8f0 net/ipv4/netfilter/arp_tables.c:1441 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 ip_getsockopt net/ipv4/ip_sockglue.c:1777 [inline] ip_getsockopt+0x164/0x1c0 net/ipv4/ip_sockglue.c:1756 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:4141 __sys_getsockopt+0x208/0x4e0 net/socket.c:2156 __do_sys_getsockopt net/socket.c:2171 [inline] __se_sys_getsockopt net/socket.c:2168 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:2168 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x460d2a RSP: 002b:00007fff75120398 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007fff751203b0 RCX: 0000000000460d2a RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007fff751203ac R09: 000000000000000a R10: 00007fff751203b0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000032 R15: 0000000000227d5b INFO: task syz-executor.3:8506 blocked for more than 145 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:23928 pid: 8506 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x951/0x2290 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x9e9/0x1240 kernel/locking/mutex.c:1103 xt_find_table_lock+0x41/0x580 net/netfilter/x_tables.c:1206 xt_request_find_table_lock+0x27/0x130 net/netfilter/x_tables.c:1253 get_info+0x179/0x720 net/ipv4/netfilter/arp_tables.c:807 do_arpt_get_ctl+0x456/0x8f0 net/ipv4/netfilter/arp_tables.c:1441 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 ip_getsockopt net/ipv4/ip_sockglue.c:1777 [inline] ip_getsockopt+0x164/0x1c0 net/ipv4/ip_sockglue.c:1756 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:4141 __sys_getsockopt+0x208/0x4e0 net/socket.c:2156 __do_sys_getsockopt net/socket.c:2171 [inline] __se_sys_getsockopt net/socket.c:2168 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:2168 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x460d2a RSP: 002b:00007fff2ea63f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007fff2ea63f50 RCX: 0000000000460d2a RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007fff2ea63f4c R09: 000000000000000a R10: 00007fff2ea63f50 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000032 R15: 0000000000227d15 INFO: task syz-executor.4:8508 blocked for more than 145 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:23904 pid: 8508 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x951/0x2290 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x9e9/0x1240 kernel/locking/mutex.c:1103 exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] synchronize_rcu_expedited+0x2ab/0x650 kernel/rcu/tree_exp.h:836 synchronize_rcu+0xee/0x190 kernel/rcu/tree.c:3690 xt_replace_table+0x304/0x600 net/netfilter/x_tables.c:1389 __do_replace+0x1da/0x910 net/ipv6/netfilter/ip6_tables.c:1083 do_replace net/ipv4/netfilter/arp_tables.c:984 [inline] do_arpt_set_ctl+0xae5/0xec0 net/ipv4/netfilter/arp_tables.c:1418 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x3c3/0x3ac0 net/ipv4/ip_sockglue.c:1435 tcp_setsockopt+0x136/0x2500 net/ipv4/tcp.c:3597 __sys_setsockopt+0x352/0x610 net/socket.c:2115 __do_sys_setsockopt net/socket.c:2126 [inline] __se_sys_setsockopt net/socket.c:2123 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2123 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x460d4a RSP: 002b:00007ffeb1e423f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffeb1e42460 RCX: 0000000000460d4a RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000408 R09: 0000000000004000 R10: 000000000074a490 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000032 R15: 0000000000227d1e INFO: task syz-executor.5:8628 blocked for more than 146 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:23624 pid: 8628 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x951/0x2290 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 synchronize_rcu_expedited+0x478/0x650 kernel/rcu/tree_exp.h:852 synchronize_rcu+0xee/0x190 kernel/rcu/tree.c:3690 xt_replace_table+0x304/0x600 net/netfilter/x_tables.c:1389 __do_replace+0x1da/0x900 net/ipv4/netfilter/ip_tables.c:1066 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0x8e7/0xb80 net/ipv4/netfilter/ip_tables.c:1627 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x3c3/0x3ac0 net/ipv4/ip_sockglue.c:1435 tcp_setsockopt+0x136/0x2500 net/ipv4/tcp.c:3597 __sys_setsockopt+0x352/0x610 net/socket.c:2115 __do_sys_setsockopt net/socket.c:2126 [inline] __se_sys_setsockopt net/socket.c:2123 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2123 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x460d4a RSP: 002b:00007ffecb2648f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffecb264920 RCX: 0000000000460d4a RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000074ee60 R08: 00000000000002d8 R09: 0000000000004000 R10: 000000000074cd00 R11: 0000000000000202 R12: 00007ffecb264980 R13: 0000000000000003 R14: 000000000074cca0 R15: 0000000000000000 Showing all locks held in the system: 3 locks held by kworker/u4:2/52: #0: ffff8880b9d34c58 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1318 [inline] #0: ffff8880b9d34c58 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x25c/0x2290 kernel/sched/core.c:4995 #1: ffff8880b9d20088 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x335/0x4c0 kernel/sched/psi.c:833 #2: ffff8880b9d24898 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x6f/0x280 kernel/time/timer.c:944 1 lock held by khungtaskd/1653: #0: ffffffff8ba40120 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x28c kernel/locking/lockdep.c:6254 1 lock held by khugepaged/1660: #0: ffffffff8bb7bc48 (lock#5){+.+.}-{3:3}, at: lru_add_drain_all+0x5f/0x8b0 mm/swap.c:801 1 lock held by in:imklog/8169: #0: ffff88801601f4f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:932 1 lock held by syz-executor.0/8500: #0: ffff888021cf8308 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x41/0x580 net/netfilter/x_tables.c:1206 1 lock held by syz-executor.1/8502: #0: ffff888021cf8458 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x41/0x580 net/netfilter/x_tables.c:1206 1 lock held by syz-executor.2/8504: #0: ffff888021cf8458 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x41/0x580 net/netfilter/x_tables.c:1206 1 lock held by syz-executor.3/8506: #0: ffff888021cf8458 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x41/0x580 net/netfilter/x_tables.c:1206 2 locks held by syz-executor.4/8508: #0: ffff888021cf8458 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x41/0x580 net/netfilter/x_tables.c:1206 #1: ffffffff8ba4d668 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #1: ffffffff8ba4d668 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2ab/0x650 kernel/rcu/tree_exp.h:836 2 locks held by syz-executor.5/8628: #0: ffff888021cf8308 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x41/0x580 net/netfilter/x_tables.c:1206 #1: ffffffff8ba4d668 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8ba4d668 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x51f/0x650 kernel/rcu/tree_exp.h:836 3 locks held by kworker/1:2/14127: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1653 Comm: khungtaskd Not tainted 5.10.0-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+0x107/0x163 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x5c/0x7b 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+0xe36/0x11f0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 14127 Comm: kworker/1:2 Not tainted 5.10.0-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:debug_lockdep_rcu_enabled+0x0/0x30 kernel/rcu/update.c:278 Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 65 81 05 60 e0 dc 76 00 00 00 f0 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <8b> 05 4e 0b ea 04 85 c0 74 21 8b 05 1c 3c ea 04 85 c0 74 17 65 48 RSP: 0018:ffffc90009fe7aa8 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff815b1d21 RDX: fffffbfff1c1e972 RSI: 0000000000000008 RDI: ffffffff8e0f4b88 RBP: 1ffff920013fcf5a R08: 0000000000000000 R09: ffffffff8e0f4b8f R10: fffffbfff1c1e971 R11: 0000000000000000 R12: 0000000000000001 R13: ffffc900accaa188 R14: 1ffff920013fcf75 R15: ffff8880196c5420 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb81ce42000 CR3: 0000000021674000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_held_common kernel/rcu/update.c:102 [inline] rcu_read_lock_sched_held+0xd/0x70 kernel/rcu/update.c:121 trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x5c3/0x710 kernel/locking/lockdep.c:5448 __mutex_unlock_slowpath+0x81/0x660 kernel/locking/mutex.c:1228 fd_array_map_delete_elem+0x1b0/0x2e0 kernel/bpf/arraymap.c:762 bpf_fd_array_map_clear kernel/bpf/arraymap.c:809 [inline] prog_array_map_clear_deferred+0x10b/0x1b0 kernel/bpf/arraymap.c:988 process_one_work+0x868/0x15c0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296