INFO: task systemd-udevd:30134 blocked for more than 143 seconds. Not tainted 5.14.0-rc5-next-20210810-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:27912 pid:30134 ppid: 2984 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 del_gendisk+0x84/0x730 block/genhd.c:598 nbd_dev_remove drivers/block/nbd.c:241 [inline] nbd_put.part.0+0x82/0x160 drivers/block/nbd.c:263 nbd_put drivers/block/nbd.c:1527 [inline] nbd_release+0x14d/0x1a0 drivers/block/nbd.c:1526 blkdev_put_whole fs/block_dev.c:1094 [inline] blkdev_put+0x2fb/0x9e0 fs/block_dev.c:1385 blkdev_close+0x8c/0xb0 fs/block_dev.c:1395 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fb062a8c270 RSP: 002b:00007ffc84092758 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007fb062a8c270 RDX: 000000000aba9500 RSI: 0000000000000000 RDI: 0000000000000007 RBP: 00007fb063946710 R08: 000000000000004a R09: 0000000000000008 R10: 00005566f9661a98 R11: 0000000000000246 R12: 0000000000000000 R13: 00005566f96617e0 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.0:30918 can't die for more than 143 seconds. task:syz-executor.0 state:D stack:28600 pid:30918 ppid: 6590 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 nbd_genl_connect+0x1fb/0x1820 drivers/block/nbd.c:1826 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2403 ___sys_sendmsg+0xf3/0x170 net/socket.c:2457 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2486 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007ffa6dc89188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020024084 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff602cdbff R14: 00007ffa6dc89300 R15: 0000000000022000 INFO: task syz-executor.0:30918 blocked for more than 144 seconds. Not tainted 5.14.0-rc5-next-20210810-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28600 pid:30918 ppid: 6590 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 nbd_genl_connect+0x1fb/0x1820 drivers/block/nbd.c:1826 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2403 ___sys_sendmsg+0xf3/0x170 net/socket.c:2457 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2486 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007ffa6dc89188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020024084 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff602cdbff R14: 00007ffa6dc89300 R15: 0000000000022000 INFO: task syz-executor.3:30919 can't die for more than 144 seconds. task:syz-executor.3 state:D stack:28616 pid:30919 ppid: 6596 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007f2dd9a52020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f2dd9a52110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007f2dd9a52160 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007f2dd9a52074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007f2dd9a520c8 R13: 00007f2dd9a52160 R14: 0000000000000004 R15: 0000000000000000 INFO: task syz-executor.3:30919 blocked for more than 144 seconds. Not tainted 5.14.0-rc5-next-20210810-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28616 pid:30919 ppid: 6596 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007f2dd9a52020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f2dd9a52110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007f2dd9a52160 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007f2dd9a52074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007f2dd9a520c8 R13: 00007f2dd9a52160 R14: 0000000000000004 R15: 0000000000000000 INFO: task syz-executor.4:30920 can't die for more than 145 seconds. task:syz-executor.4 state:D stack:28544 pid:30920 ppid: 6598 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007fa600070020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fa600070110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007fa600070160 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007fa600070074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007fa6000700c8 R13: 00007fa600070160 R14: 0000000000000004 R15: 0000000000000000 INFO: task syz-executor.4:30920 blocked for more than 145 seconds. Not tainted 5.14.0-rc5-next-20210810-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28544 pid:30920 ppid: 6598 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007fa600070020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fa600070110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007fa600070160 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007fa600070074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007fa6000700c8 R13: 00007fa600070160 R14: 0000000000000004 R15: 0000000000000000 INFO: task syz-executor.4:30924 can't die for more than 146 seconds. task:syz-executor.4 state:D stack:29768 pid:30924 ppid: 6598 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007fa60004f020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fa60004f110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007fa60004f160 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007fa60004f074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007fa60004f0c8 R13: 00007fa60004f160 R14: 0000000000000004 R15: 0000000000000000 INFO: task syz-executor.4:30924 blocked for more than 146 seconds. Not tainted 5.14.0-rc5-next-20210810-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29768 pid:30924 ppid: 6598 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007fa60004f020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fa60004f110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007fa60004f160 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007fa60004f074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007fa60004f0c8 R13: 00007fa60004f160 R14: 0000000000000004 R15: 0000000000000000 INFO: task syz-executor.2:30940 can't die for more than 146 seconds. task:syz-executor.2 state:D stack:29392 pid:30940 ppid: 6594 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007f0c131b1020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f0c131b1110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007f0c131b1160 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007f0c131b1074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007f0c131b10c8 R13: 00007f0c131b1160 R14: 0000000000000003 R15: 0000000000000000 INFO: task syz-executor.2:30940 blocked for more than 147 seconds. Not tainted 5.14.0-rc5-next-20210810-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:29392 pid:30940 ppid: 6594 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007f0c131b1020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f0c131b1110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007f0c131b1160 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007f0c131b1074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007f0c131b10c8 R13: 00007f0c131b1160 R14: 0000000000000003 R15: 0000000000000000 INFO: task syz-executor.2:30945 can't die for more than 147 seconds. task:syz-executor.2 state:D stack:29392 pid:30945 ppid: 6594 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007f0c13190020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f0c13190110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007f0c13190160 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007f0c13190074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007f0c131900c8 R13: 00007f0c13190160 R14: 0000000000000004 R15: 0000000000000000 INFO: task syz-executor.2:30945 blocked for more than 147 seconds. Not tainted 5.14.0-rc5-next-20210810-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:29392 pid:30945 ppid: 6594 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007f0c13190020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f0c13190110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007f0c13190160 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007f0c13190074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007f0c131900c8 R13: 00007f0c13190160 R14: 0000000000000004 R15: 0000000000000000 INFO: task syz-executor.5:30943 can't die for more than 148 seconds. task:syz-executor.5 state:D stack:28544 pid:30943 ppid: 6600 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007fea91dcd020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fea91dcd110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007fea91dcd160 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007fea91dcd074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007fea91dcd0c8 R13: 00007fea91dcd160 R14: 0000000000000004 R15: 0000000000000000 INFO: task syz-executor.5:30943 blocked for more than 148 seconds. Not tainted 5.14.0-rc5-next-20210810-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28544 pid:30943 ppid: 6600 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007fea91dcd020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fea91dcd110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007fea91dcd160 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007fea91dcd074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007fea91dcd0c8 R13: 00007fea91dcd160 R14: 0000000000000004 R15: 0000000000000000 INFO: task syz-executor.5:30946 can't die for more than 149 seconds. task:syz-executor.5 state:D stack:29768 pid:30946 ppid: 6600 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007fea91dac020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fea91dac110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007fea91dac160 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007fea91dac074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007fea91dac0c8 R13: 00007fea91dac160 R14: 0000000000000004 R15: 0000000000000000 INFO: task syz-executor.5:30946 blocked for more than 149 seconds. Not tainted 5.14.0-rc5-next-20210810-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29768 pid:30946 ppid: 6600 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4698 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5955 schedule+0xd3/0x270 kernel/sched/core.c:6034 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x41957c RSP: 002b:00007fea91dac020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fea91dac110 RCX: 000000000041957c RDX: 000000000000001c RSI: 00007fea91dac160 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007fea91dac074 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007fea91dac0c8 R13: 00007fea91dac160 R14: 0000000000000004 R15: 0000000000000000 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.14.0-rc5-next-20210810-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline] watchdog+0xcb7/0xed0 kernel/hung_task.c:339 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 6569 Comm: syz-fuzzer Not tainted 5.14.0-rc5-next-20210810-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:197 Code: 01 f0 4d 89 03 e9 63 fd ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 <65> 8b 05 59 49 8c 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b RSP: 0018:ffffc9000c597f00 EFLAGS: 00000002 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffff888017b20000 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff8198fe02 R11: 0000000000000000 R12: ffffc9000c597f58 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 000000c00002e490(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff7f5369028 CR3: 0000000072457000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_unlock_sched_notrace include/linux/rcupdate.h:809 [inline] trace_user_enter.constprop.0+0x16b/0x220 include/trace/events/context_tracking.h:34 __context_tracking_enter+0xe1/0x100 kernel/context_tracking.c:81 user_enter_irqoff include/linux/context_tracking.h:41 [inline] __exit_to_user_mode kernel/entry/common.c:130 [inline] syscall_exit_to_user_mode+0x48/0x60 kernel/entry/common.c:304 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x46e380 Code: 0f 05 89 44 24 20 c3 cc cc cc 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 44 8b 54 24 1c 49 c7 c0 00 00 00 00 b8 19 01 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc RSP: 002b:000000c00003f7f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000119 RAX: 0000000000000000 RBX: 00000000000003e7 RCX: 000000000046e380 RDX: 0000000000000080 RSI: 000000c00003f840 RDI: 0000000000000003 RBP: 000000c00003fe40 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000003e7 R11: 0000000000000246 R12: 0000000000000003 R13: 000000c000000900 R14: 000000c0000822a0 R15: 0000000000002d7e