INFO: task kworker/1:0:19 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:28960 pid: 19 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4570 process_one_work+0x789/0xfc0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task syz-executor224:8454 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor224 state:D stack:26104 pid: 8454 ppid: 8448 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 tcf_action_init_1+0x4c2/0xa80 net/sched/act_api.c:988 tcf_action_init+0x12f/0x4d0 net/sched/act_api.c:1063 tcf_action_add net/sched/act_api.c:1476 [inline] tc_ctl_action+0x2c7/0x7d0 net/sched/act_api.c:1530 rtnetlink_rcv_msg+0x887/0xd60 net/core/rtnetlink.c:5553 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x2bf/0x370 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x445c89 RSP: 002b:00007f5a9e3ff318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004cb428 RCX: 0000000000445c89 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000003 RBP: 00000000004cb420 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 6b72616d6e6e6f63 R13: 00007ffc36aac46f R14: 00007f5a9e3ff400 R15: 0000000000022000 INFO: task syz-executor224:8467 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor224 state:D stack:28768 pid: 8467 ppid: 8448 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x2bf/0x370 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x445c89 RSP: 002b:00007f5a9e3de318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004cb438 RCX: 0000000000445c89 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 RBP: 00000000004cb430 R08: 0000000000000030 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 6b72616d6e6e6f63 R13: 00007ffc36aac46f R14: 00007f5a9e3de400 R15: 0000000000022000 INFO: task syz-executor224:8463 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor224 state:D stack:28240 pid: 8463 ppid: 8451 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x2bf/0x370 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x445c89 RSP: 002b:00007f5a9e3ff318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004cb428 RCX: 0000000000445c89 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000003 RBP: 00000000004cb420 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 6b72616d6e6e6f63 R13: 00007ffc36aac46f R14: 00007f5a9e3ff400 R15: 0000000000022000 INFO: task syz-executor224:8469 blocked for more than 144 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor224 state:D stack:28768 pid: 8469 ppid: 8451 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x2bf/0x370 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x445c89 RSP: 002b:00007f5a9e3de318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004cb438 RCX: 0000000000445c89 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 RBP: 00000000004cb430 R08: 0000000000000030 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 6b72616d6e6e6f63 R13: 00007ffc36aac46f R14: 00007f5a9e3de400 R15: 0000000000022000 INFO: task syz-executor224:8464 blocked for more than 144 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor224 state:D stack:28768 pid: 8464 ppid: 8452 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x2bf/0x370 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x445c89 RSP: 002b:00007f5a9e3ff318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004cb428 RCX: 0000000000445c89 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000003 RBP: 00000000004cb420 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 6b72616d6e6e6f63 R13: 00007ffc36aac46f R14: 00007f5a9e3ff400 R15: 0000000000022000 INFO: task syz-executor224:8471 blocked for more than 144 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor224 state:D stack:28768 pid: 8471 ppid: 8452 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x2bf/0x370 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x445c89 RSP: 002b:00007f5a9e3de318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004cb438 RCX: 0000000000445c89 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 RBP: 00000000004cb430 R08: 0000000000000030 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 6b72616d6e6e6f63 R13: 00007ffc36aac46f R14: 00007f5a9e3de400 R15: 0000000000022000 INFO: task syz-executor224:8468 blocked for more than 144 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor224 state:D stack:28768 pid: 8468 ppid: 8455 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x2bf/0x370 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x445c89 RSP: 002b:00007f5a9e3de318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004cb438 RCX: 0000000000445c89 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 RBP: 00000000004cb430 R08: 0000000000000030 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 6b72616d6e6e6f63 R13: 00007ffc36aac46f R14: 00007f5a9e3de400 R15: 0000000000022000 INFO: task syz-executor224:8461 blocked for more than 145 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor224 state:D stack:28768 pid: 8461 ppid: 8453 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x2bf/0x370 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x445c89 RSP: 002b:00007f5a9e3ff318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004cb428 RCX: 0000000000445c89 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000003 RBP: 00000000004cb420 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 6b72616d6e6e6f63 R13: 00007ffc36aac46f R14: 00007f5a9e3ff400 R15: 0000000000022000 INFO: task syz-executor224:8470 blocked for more than 145 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor224 state:D stack:28768 pid: 8470 ppid: 8453 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x2bf/0x370 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x445c89 RSP: 002b:00007f5a9e3de318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004cb438 RCX: 0000000000445c89 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 RBP: 00000000004cb430 R08: 0000000000000030 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 6b72616d6e6e6f63 R13: 00007ffc36aac46f R14: 00007f5a9e3de400 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/1:0/19: #0: ffff888147700938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfc0 kernel/workqueue.c:2248 #1: ffffc90000d97d78 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x733/0xfc0 kernel/workqueue.c:2250 #2: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4570 1 lock held by khungtaskd/1644: #0: ffffffff8c711740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by in:imklog/8160: #0: ffff8880195b8370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:947 1 lock held by syz-executor224/8454: #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: tcf_action_init_1+0x4c2/0xa80 net/sched/act_api.c:988 1 lock held by syz-executor224/8467: #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 1 lock held by syz-executor224/8463: #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 1 lock held by syz-executor224/8469: #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 1 lock held by syz-executor224/8464: #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 1 lock held by syz-executor224/8471: #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 1 lock held by syz-executor224/8462: 1 lock held by syz-executor224/8468: #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 1 lock held by syz-executor224/8461: #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 1 lock held by syz-executor224/8470: #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 1 lock held by syz-executor224/8465: #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 1 lock held by syz-executor224/8472: #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d6eeb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1644 Comm: khungtaskd Not tainted 5.11.0-rc6-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+0x137/0x1be lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 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+0xce9/0xd30 kernel/hung_task.c:294 kthread+0x39a/0x3c0 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: 4881 Comm: systemd-journal Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:_raw_spin_unlock+0x0/0x40 kernel/locking/spinlock.c:182 Code: fd f7 49 8d 7e 18 31 f6 31 d2 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 7f 9d 10 f8 48 83 c4 08 4c 89 f7 5b 41 5e e9 40 b4 12 f8 <53> 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 4e 03 11 f8 48 89 df e8 RSP: 0018:ffffc900012a7a80 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff888012528000 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88802387bdf0 RBP: 1ffff1100470f7c6 R08: ffffffff81ca9adf R09: fffff52000254f49 R10: fffff52000254f49 R11: 0000000000000000 R12: ffff88802387bd60 R13: dffffc0000000000 R14: ffff88802387bdf0 R15: ffff88802387be30 FS: 00007fbd425598c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbd3f943018 CR3: 0000000012443000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fast_dput fs/dcache.c:825 [inline] dput+0x1d1/0x6f0 fs/dcache.c:872 __traverse_mounts fs/namei.c:1227 [inline] traverse_mounts+0x407/0x690 fs/namei.c:1272 handle_mounts fs/namei.c:1381 [inline] step_into+0x146/0x1e60 fs/namei.c:1691 walk_component+0x2b7/0x6b0 fs/namei.c:1867 link_path_walk+0x5e7/0xc10 fs/namei.c:2182 path_lookupat+0xab/0x970 fs/namei.c:2335 filename_lookup+0x1b0/0x5e0 fs/namei.c:2369 user_path_at include/linux/namei.h:59 [inline] do_faccessat+0x396/0x870 fs/open.c:423 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fbd418149c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffe1cecb228 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffe1cece250 RCX: 00007fbd418149c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000056054936e9a3 RBP: 00007ffe1cecb370 R08: 00005605493643e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 000056054a8e28a0 R15: 00007ffe1cecb860