syzbot

IPVS: ftp: loaded support on port[0] = 21
BUG: sleeping function called from invalid context at net/core/sock.c:2769
in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
5 locks held by kworker/u4:3/85:
 #0:  ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494
 #3:  (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
CPU: 0 PID: 85 Comm: kworker/u4:3 Not tainted 4.16.0-rc1+ #230
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
 __might_sleep+0x95/0x190 kernel/sched/core.c:6081
 lock_sock_nested+0x37/0x110 net/core/sock.c:2769
 lock_sock include/net/sock.h:1463 [inline]
 tipc_release+0x103/0xff0 net/tipc/socket.c:572
 sock_release+0x8d/0x1e0 net/socket.c:594
 tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
 tipc_exit_net+0x15/0x40 net/tipc/core.c:96
 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
 cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
IPVS: ftp: loaded support on port[0] = 21
BUG: sleeping function called from invalid context at net/core/sock.c:2769
in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
5 locks held by kworker/u4:3/85:
 #0:  ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494
 #3:  (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
CPU: 0 PID: 85 Comm: kworker/u4:3 Tainted: G        W        4.16.0-rc1+ #230
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
 __might_sleep+0x95/0x190 kernel/sched/core.c:6081
 lock_sock_nested+0x37/0x110 net/core/sock.c:2769
 lock_sock include/net/sock.h:1463 [inline]
 tipc_release+0x103/0xff0 net/tipc/socket.c:572
 sock_release+0x8d/0x1e0 net/socket.c:594
 tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
 tipc_exit_net+0x15/0x40 net/tipc/core.c:96
 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
 cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
BUG: sleeping function called from invalid context at net/core/sock.c:2769
in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
5 locks held by kworker/u4:3/85:
 #0:  ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494
 #3:  (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
CPU: 0 PID: 85 Comm: kworker/u4:3 Tainted: G        W        4.16.0-rc1+ #230
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
 __might_sleep+0x95/0x190 kernel/sched/core.c:6081
 lock_sock_nested+0x37/0x110 net/core/sock.c:2769
 lock_sock include/net/sock.h:1463 [inline]
 tipc_release+0x103/0xff0 net/tipc/socket.c:572
 sock_release+0x8d/0x1e0 net/socket.c:594
 tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
 tipc_exit_net+0x15/0x40 net/tipc/core.c:96
 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
 cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
IPVS: ftp: loaded support on port[0] = 21
BUG: sleeping function called from invalid context at net/core/sock.c:2769
in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
5 locks held by kworker/u4:3/85:
 #0:  ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494
 #3:  (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
CPU: 1 PID: 85 Comm: kworker/u4:3 Tainted: G        W        4.16.0-rc1+ #230
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
 __might_sleep+0x95/0x190 kernel/sched/core.c:6081
 lock_sock_nested+0x37/0x110 net/core/sock.c:2769
 lock_sock include/net/sock.h:1463 [inline]
 tipc_release+0x103/0xff0 net/tipc/socket.c:572
 sock_release+0x8d/0x1e0 net/socket.c:594
 tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
 tipc_exit_net+0x15/0x40 net/tipc/core.c:96
 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
 cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
BUG: sleeping function called from invalid context at net/core/sock.c:2769
in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
5 locks held by kworker/u4:3/85:
 #0:  ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494
 #3:  (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
CPU: 0 PID: 85 Comm: kworker/u4:3 Tainted: G        W        4.16.0-rc1+ #230
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
 __might_sleep+0x95/0x190 kernel/sched/core.c:6081
 lock_sock_nested+0x37/0x110 net/core/sock.c:2769
 lock_sock include/net/sock.h:1463 [inline]
 tipc_release+0x103/0xff0 net/tipc/socket.c:572
 sock_release+0x8d/0x1e0 net/socket.c:594
 tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
 tipc_exit_net+0x15/0x40 net/tipc/core.c:96
 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
 cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
IPVS: ftp: loaded support on port[0] = 21
BUG: sleeping function called from invalid context at net/core/sock.c:2769
in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
5 locks held by kworker/u4:3/85:
 #0:  ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494
 #3:  (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
CPU: 0 PID: 85 Comm: kworker/u4:3 Tainted: G        W        4.16.0-rc1+ #230
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
 __might_sleep+0x95/0x190 kernel/sched/core.c:6081
 lock_sock_nested+0x37/0x110 net/core/sock.c:2769
 lock_sock include/net/sock.h:1463 [inline]
 tipc_release+0x103/0xff0 net/tipc/socket.c:572
 sock_release+0x8d/0x1e0 net/socket.c:594
 tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
 tipc_exit_net+0x15/0x40 net/tipc/core.c:96
 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
 cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
BUG: sleeping function called from invalid context at net/core/sock.c:2769
in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
5 locks held by kworker/u4:3/85:
 #0:  ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494
 #3:  (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
CPU: 0 PID: 85 Comm: kworker/u4:3 Tainted: G        W        4.16.0-rc1+ #230
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
 __might_sleep+0x95/0x190 kernel/sched/core.c:6081
 lock_sock_nested+0x37/0x110 net/core/sock.c:2769
 lock_sock include/net/sock.h:1463 [inline]
 tipc_release+0x103/0xff0 net/tipc/socket.c:572
 sock_release+0x8d/0x1e0 net/socket.c:594
 tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
 tipc_exit_net+0x15/0x40 net/tipc/core.c:96
 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
 cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
IPVS: ftp: loaded support on port[0] = 21
BUG: sleeping function called from invalid context at net/core/sock.c:2769
in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
5 locks held by kworker/u4:3/85:
 #0:  ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494
 #3:  (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] spin_lock_bh include/linux/spinlock.h:315 [inline]
 #4:  (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
CPU: 0 PID: 85 Comm: kworker/u4:3 Tainted: G        W        4.16.0-rc1+ #230
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
 __might_sleep+0x95/0x190 kernel/sched/core.c:6081
 lock_sock_nested+0x37/0x110 net/core/sock.c:2769
 lock_sock include/net/sock.h:1463 [inline]
 tipc_release+0x103/0xff0 net/tipc/socket.c:572
 sock_release+0x8d/0x1e0 net/socket.c:594
 tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
 tipc_exit_net+0x15/0x40 net/tipc/core.c:96
 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
 cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429