INFO: task khugepaged:1672 blocked for more than 143 seconds. Not tainted 5.11.0-next-20210226-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:khugepaged state:D stack:28216 pid: 1672 ppid: 2 flags:0x00004000 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_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213 __mutex_lock_common kernel/locking/mutex.c:1023 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093 lru_add_drain_all+0x5f/0x6f0 mm/swap.c:777 khugepaged_do_scan mm/khugepaged.c:2213 [inline] khugepaged+0x10f/0x52e0 mm/khugepaged.c:2274 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task syz-executor.2:8422 blocked for more than 143 seconds. Not tainted 5.11.0-next-20210226-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:23872 pid: 8422 ppid: 1 flags:0x00000004 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 synchronize_rcu_expedited+0x453/0x620 kernel/rcu/tree_exp.h:852 synchronize_rcu+0xdf/0x180 kernel/rcu/tree.c:3767 xt_replace_table+0x304/0x600 net/netfilter/x_tables.c:1389 __do_replace+0x1d7/0x8c0 net/ipv6/netfilter/ip6_tables.c:1083 do_replace net/ipv4/netfilter/arp_tables.c:984 [inline] do_arpt_set_ctl+0xad8/0xea0 net/ipv4/netfilter/arp_tables.c:1418 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x3c3/0x3a00 net/ipv4/ip_sockglue.c:1435 tcp_setsockopt+0x136/0x2440 net/ipv4/tcp.c:3636 __sys_setsockopt+0x2db/0x610 net/socket.c:2117 __do_sys_setsockopt net/socket.c:2128 [inline] __se_sys_setsockopt net/socket.c:2125 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2125 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x46753a RSP: 002b:00007ffecfa7b7d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffecfa7b7ec RCX: 000000000046753a RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000408 R09: 00007ffecfa7b850 R10: 000000000053c4f0 R11: 0000000000000246 R12: 00007ffecfa7b840 R13: 0000000001b1286b R14: 0000000000000000 R15: 00007ffecfa7bf60 INFO: task syz-executor.4:8426 blocked for more than 144 seconds. Not tainted 5.11.0-next-20210226-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:23872 pid: 8426 ppid: 1 flags:0x00000004 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_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213 __mutex_lock_common kernel/locking/mutex.c:1023 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093 xt_find_table_lock+0x41/0x540 net/netfilter/x_tables.c:1206 xt_request_find_table_lock+0x27/0xf0 net/netfilter/x_tables.c:1253 get_info+0x178/0x720 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:4231 __sys_getsockopt+0x21f/0x5f0 net/socket.c:2161 __do_sys_getsockopt net/socket.c:2176 [inline] __se_sys_getsockopt net/socket.c:2173 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:2173 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x46750a RSP: 002b:00007ffe8a817cb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffe8a817ccc RCX: 000000000046750a RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007ffe8a817ccc R09: 00007ffe8a817d30 R10: 00007ffe8a817cd0 R11: 0000000000000246 R12: 00007ffe8a817cd0 R13: 000000000005d381 R14: 0000000000000000 R15: 00007ffe8a818440 INFO: task syz-executor.3:12931 can't die for more than 145 seconds. task:syz-executor.3 state:D stack:29632 pid:12931 ppid: 8424 flags:0x00000004 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_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213 __mutex_lock_common kernel/locking/mutex.c:1023 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093 account_event kernel/events/core.c:11218 [inline] perf_event_alloc.part.0+0x3047/0x3960 kernel/events/core.c:11441 perf_event_alloc kernel/events/core.c:11752 [inline] __do_sys_perf_event_open+0x647/0x2e60 kernel/events/core.c:11850 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007fdf94bdb188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 000000002001d000 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc51c8387f R14: 00007fdf94bdb300 R15: 0000000000022000 INFO: task syz-executor.3:12931 blocked for more than 145 seconds. Not tainted 5.11.0-next-20210226-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29632 pid:12931 ppid: 8424 flags:0x00000004 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_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213 __mutex_lock_common kernel/locking/mutex.c:1023 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093 account_event kernel/events/core.c:11218 [inline] perf_event_alloc.part.0+0x3047/0x3960 kernel/events/core.c:11441 perf_event_alloc kernel/events/core.c:11752 [inline] __do_sys_perf_event_open+0x647/0x2e60 kernel/events/core.c:11850 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007fdf94bdb188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 000000002001d000 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc51c8387f R14: 00007fdf94bdb300 R15: 0000000000022000 INFO: task syz-executor.5:12930 can't die for more than 146 seconds. task:syz-executor.5 state:D stack:29288 pid:12930 ppid: 8605 flags:0x00000004 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_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213 __mutex_lock_common kernel/locking/mutex.c:1023 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093 exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] synchronize_rcu_expedited+0x27e/0x620 kernel/rcu/tree_exp.h:836 synchronize_rcu+0xdf/0x180 kernel/rcu/tree.c:3767 account_event kernel/events/core.c:11226 [inline] perf_event_alloc.part.0+0x3271/0x3960 kernel/events/core.c:11441 perf_event_alloc kernel/events/core.c:11752 [inline] __do_sys_perf_event_open+0x647/0x2e60 kernel/events/core.c:11850 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007f7083578188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 000000002001d000 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffd55db9f6f R14: 00007f7083578300 R15: 0000000000022000 INFO: task syz-executor.5:12930 blocked for more than 146 seconds. Not tainted 5.11.0-next-20210226-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29288 pid:12930 ppid: 8605 flags:0x00000004 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_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213 __mutex_lock_common kernel/locking/mutex.c:1023 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093 exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] synchronize_rcu_expedited+0x27e/0x620 kernel/rcu/tree_exp.h:836 synchronize_rcu+0xdf/0x180 kernel/rcu/tree.c:3767 account_event kernel/events/core.c:11226 [inline] perf_event_alloc.part.0+0x3271/0x3960 kernel/events/core.c:11441 perf_event_alloc kernel/events/core.c:11752 [inline] __do_sys_perf_event_open+0x647/0x2e60 kernel/events/core.c:11850 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007f7083578188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 000000002001d000 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffd55db9f6f R14: 00007f7083578300 R15: 0000000000022000 INFO: task syz-executor.1:12933 can't die for more than 147 seconds. task:syz-executor.1 state:D stack:29632 pid:12933 ppid: 8420 flags:0x00000004 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_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213 __mutex_lock_common kernel/locking/mutex.c:1023 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093 account_event kernel/events/core.c:11218 [inline] perf_event_alloc.part.0+0x3047/0x3960 kernel/events/core.c:11441 perf_event_alloc kernel/events/core.c:11752 [inline] __do_sys_perf_event_open+0x647/0x2e60 kernel/events/core.c:11850 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007fa1b11fd188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 000000002001d000 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffe5151213f R14: 00007fa1b11fd300 R15: 0000000000022000 INFO: task syz-executor.1:12933 blocked for more than 147 seconds. Not tainted 5.11.0-next-20210226-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29632 pid:12933 ppid: 8420 flags:0x00000004 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_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213 __mutex_lock_common kernel/locking/mutex.c:1023 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093 account_event kernel/events/core.c:11218 [inline] perf_event_alloc.part.0+0x3047/0x3960 kernel/events/core.c:11441 perf_event_alloc kernel/events/core.c:11752 [inline] __do_sys_perf_event_open+0x647/0x2e60 kernel/events/core.c:11850 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007fa1b11fd188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 000000002001d000 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffe5151213f R14: 00007fa1b11fd300 R15: 0000000000022000 INFO: task syz-executor.0:12932 can't die for more than 148 seconds. task:syz-executor.0 state:D stack:27808 pid:12932 ppid: 8418 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 __flush_work+0x527/0xac0 kernel/workqueue.c:3052 lru_add_drain_all+0x41f/0x6f0 mm/swap.c:826 invalidate_bdev+0x96/0xd0 fs/block_dev.c:96 __loop_clr_fd+0x4fd/0xff0 drivers/block/loop.c:1241 loop_clr_fd drivers/block/loop.c:1336 [inline] lo_ioctl+0x3b9/0x1620 drivers/block/loop.c:1694 blkdev_ioctl+0x2a1/0x6d0 block/ioctl.c:583 block_ioctl+0xf9/0x140 fs/block_dev.c:1658 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465cb7 RSP: 002b:00007ff22e134fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000020002040 RCX: 0000000000465cb7 RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004 RBP: 00007ff22e1356bc R08: 00007ff22e135040 R09: 0000000020000a40 R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff R13: 0000000000000016 R14: 00007ff22e135000 R15: 0000000020002100 INFO: task syz-executor.0:12932 blocked for more than 149 seconds. Not tainted 5.11.0-next-20210226-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27808 pid:12932 ppid: 8418 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 __flush_work+0x527/0xac0 kernel/workqueue.c:3052 lru_add_drain_all+0x41f/0x6f0 mm/swap.c:826 invalidate_bdev+0x96/0xd0 fs/block_dev.c:96 __loop_clr_fd+0x4fd/0xff0 drivers/block/loop.c:1241 loop_clr_fd drivers/block/loop.c:1336 [inline] lo_ioctl+0x3b9/0x1620 drivers/block/loop.c:1694 blkdev_ioctl+0x2a1/0x6d0 block/ioctl.c:583 block_ioctl+0xf9/0x140 fs/block_dev.c:1658 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465cb7 RSP: 002b:00007ff22e134fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000020002040 RCX: 0000000000465cb7 RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004 RBP: 00007ff22e1356bc R08: 00007ff22e135040 R09: 0000000020000a40 R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff R13: 0000000000000016 R14: 00007ff22e135000 R15: 0000000020002100 INFO: task syz-executor.0:12946 can't die for more than 149 seconds. task:syz-executor.0 state:D stack:28528 pid:12946 ppid: 8418 flags:0x00000004 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_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213 __mutex_lock_common kernel/locking/mutex.c:1023 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093 blkdev_get_by_dev fs/block_dev.c:1444 [inline] blkdev_get_by_dev+0x261/0x600 fs/block_dev.c:1413 blkdev_open+0x154/0x2b0 fs/block_dev.c:1542 do_dentry_open+0x4b9/0x11b0 fs/open.c:826 do_open fs/namei.c:3365 [inline] path_openat+0x1c0e/0x27e0 fs/namei.c:3498 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_openat fs/open.c:1219 [inline] __se_sys_openat fs/open.c:1214 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1214 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4194e4 RSP: 002b:00007ff22e113ed0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00000000004afb60 RCX: 00000000004194e4 RDX: 0000000000000002 RSI: 00007ff22e114000 RDI: 00000000ffffff9c RBP: 00007ff22e114000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 0000000000000003 R14: 0000000020002040 R15: 0000000000000000 INFO: task syz-executor.0:12946 blocked for more than 150 seconds. Not tainted 5.11.0-next-20210226-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28528 pid:12946 ppid: 8418 flags:0x00000004 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_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213 __mutex_lock_common kernel/locking/mutex.c:1023 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093 blkdev_get_by_dev fs/block_dev.c:1444 [inline] blkdev_get_by_dev+0x261/0x600 fs/block_dev.c:1413 blkdev_open+0x154/0x2b0 fs/block_dev.c:1542 do_dentry_open+0x4b9/0x11b0 fs/open.c:826 do_open fs/namei.c:3365 [inline] path_openat+0x1c0e/0x27e0 fs/namei.c:3498 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_openat fs/open.c:1219 [inline] __se_sys_openat fs/open.c:1214 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1214 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4194e4 RSP: 002b:00007ff22e113ed0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00000000004afb60 RCX: 00000000004194e4 RDX: 0000000000000002 RSI: 00007ff22e114000 RDI: 00000000ffffff9c RBP: 00007ff22e114000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 0000000000000003 R14: 0000000020002040 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1664: #0: ffffffff8bf741e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327 1 lock held by khugepaged/1672: #0: ffffffff8c04ec68 (lock#5){+.+.}-{3:3}, at: lru_add_drain_all+0x5f/0x6f0 mm/swap.c:777 2 locks held by systemd-udevd/4853: #0: ffff88814209e820 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev fs/block_dev.c:1444 [inline] #0: ffff88814209e820 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x261/0x600 fs/block_dev.c:1413 #1: ffffffff8ca38b08 (loop_ctl_mutex){+.+.}-{3:3}, at: lo_open+0x1a/0x130 drivers/block/loop.c:1889 1 lock held by in:imklog/8121: #0: ffff888013b5a870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:961 3 locks held by kworker/0:3/8124: 2 locks held by syz-executor.2/8422: #0: ffff888146e48458 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x41/0x540 net/netfilter/x_tables.c:1206 #1: ffffffff8bf7cda8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8bf7cda8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fa/0x620 kernel/rcu/tree_exp.h:836 1 lock held by syz-executor.4/8426: #0: ffff888146e48458 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_table_lock+0x41/0x540 net/netfilter/x_tables.c:1206 2 locks held by kworker/1:7/9689: 1 lock held by syz-executor.3/12931: #0: ffffffff8c0382a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11218 [inline] #0: ffffffff8c0382a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x3047/0x3960 kernel/events/core.c:11441 2 locks held by syz-executor.5/12930: #0: ffffffff8c0382a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11218 [inline] #0: ffffffff8c0382a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x3047/0x3960 kernel/events/core.c:11441 #1: ffffffff8bf7cda8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #1: ffffffff8bf7cda8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x27e/0x620 kernel/rcu/tree_exp.h:836 1 lock held by syz-executor.1/12933: #0: ffffffff8c0382a8 (perf_sched_mutex){+.+.}-{3:3}, at: account_event kernel/events/core.c:11218 [inline] #0: ffffffff8c0382a8 (perf_sched_mutex){+.+.}-{3:3}, at: perf_event_alloc.part.0+0x3047/0x3960 kernel/events/core.c:11441 2 locks held by syz-executor.0/12932: #0: ffff8880616843f0 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x8b/0xff0 drivers/block/loop.c:1203 #1: ffffffff8c04ec68 (lock#5){+.+.}-{3:3}, at: lru_add_drain_all+0x5f/0x6f0 mm/swap.c:777 1 lock held by syz-executor.0/12946: #0: ffff888010c15120 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev fs/block_dev.c:1444 [inline] #0: ffff888010c15120 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x261/0x600 fs/block_dev.c:1413 3 locks held by systemd-udevd/12944: #0: ffff888010c15120 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev fs/block_dev.c:1444 [inline] #0: ffff888010c15120 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x261/0x600 fs/block_dev.c:1413 #1: ffffffff8ca38b08 (loop_ctl_mutex){+.+.}-{3:3}, at: lo_open+0x1a/0x130 drivers/block/loop.c:1889 #2: ffff8880616843f0 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open drivers/block/loop.c:1897 [inline] #2: ffff8880616843f0 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0xa1/0x130 drivers/block/loop.c:1879 2 locks held by systemd-udevd/12945: #0: ffff88814209d120 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev fs/block_dev.c:1444 [inline] #0: ffff88814209d120 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x261/0x600 fs/block_dev.c:1413 #1: ffffffff8ca38b08 (loop_ctl_mutex){+.+.}-{3:3}, at: lo_open+0x1a/0x130 drivers/block/loop.c:1889 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1664 Comm: khungtaskd Not tainted 5.11.0-next-20210226-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: 8124 Comm: kworker/0:3 Not tainted 5.11.0-next-20210226-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:rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1217 [inline] RIP: 0010:rcu_lockdep_current_cpu_online+0x5c/0x150 kernel/rcu/tree.c:1208 Code: 03 00 83 f8 07 89 c5 0f 87 f5 00 00 00 48 8d 3c ed e0 26 0a 8b 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 ad 00 00 00 48 03 1c ed e0 26 0a 8b 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc9000c90f9b0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000035fc0 RCX: ffffffff81593088 RDX: 1ffffffff16144dc RSI: 0000000000000003 RDI: ffffffff8b0a26e0 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8dc67dcf R10: fffffbfff1b8cfb9 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88802d386888 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd6ec8aa000 CR3: 0000000029af6000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_held_common kernel/rcu/update.c:112 [inline] rcu_read_lock_held_common kernel/rcu/update.c:102 [inline] rcu_read_lock_sched_held+0x25/0x70 kernel/rcu/update.c:123 trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x5d4/0x730 kernel/locking/lockdep.c:5481 __mutex_lock_common kernel/locking/mutex.c:946 [inline] __mutex_lock+0x139/0x1120 kernel/locking/mutex.c:1093 fd_array_map_delete_elem+0x120/0x2e0 kernel/bpf/arraymap.c:759 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+0x98d/0x1600 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:294