================================
WARNING: inconsistent lock state
4.14.171-syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
ksoftirqd/1/17 [HC0[0]:SC1[1]:HE1:SE0] takes:
(&(&local->client_conns_lock)->rlock){+.?.}, at: [<ffffffff85de67d8>] spin_lock include/linux/spinlock.h:317 [inline]
(&(&local->client_conns_lock)->rlock){+.?.}, at: [<ffffffff85de67d8>] rxrpc_put_one_client_conn net/rxrpc/conn_client.c:905 [inline]
(&(&local->client_conns_lock)->rlock){+.?.}, at: [<ffffffff85de67d8>] rxrpc_put_client_conn+0x538/0xaa0 net/rxrpc/conn_client.c:957
{SOFTIRQ-ON-W} state was registered at:
mark_irqflags kernel/locking/lockdep.c:3086 [inline]
__lock_acquire+0xc33/0x4620 kernel/locking/lockdep.c:3444
lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:152
spin_lock include/linux/spinlock.h:317 [inline]
rxrpc_get_client_conn net/rxrpc/conn_client.c:306 [inline]
rxrpc_connect_call+0x2f5/0x41a0 net/rxrpc/conn_client.c:692
rxrpc_new_client_call+0x8f7/0x1420 net/rxrpc/call_object.c:276
rxrpc_new_client_call_for_sendmsg net/rxrpc/sendmsg.c:525 [inline]
rxrpc_do_sendmsg+0x92a/0x1109 net/rxrpc/sendmsg.c:577
rxrpc_sendmsg+0x4d1/0x610 net/rxrpc/af_rxrpc.c:543
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xce/0x110 net/socket.c:656
___sys_sendmsg+0x349/0x840 net/socket.c:2062
__sys_sendmmsg+0x152/0x3a0 net/socket.c:2152
SYSC_sendmmsg net/socket.c:2183 [inline]
SyS_sendmmsg+0x35/0x60 net/socket.c:2178
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
irq event stamp: 2093464
hardirqs last enabled at (2093464): [<ffffffff866945cb>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
hardirqs last enabled at (2093464): [<ffffffff866945cb>] _raw_spin_unlock_irqrestore+0x6b/0xe0 kernel/locking/spinlock.c:192
hardirqs last disabled at (2093463): [<ffffffff8669485f>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (2093463): [<ffffffff8669485f>] _raw_spin_lock_irqsave+0x6f/0xcd kernel/locking/spinlock.c:160
softirqs last enabled at (2093412): [<ffffffff86a00645>] __do_softirq+0x645/0x9a0 kernel/softirq.c:314
softirqs last disabled at (2093417): [<ffffffff813902ec>] run_ksoftirqd kernel/softirq.c:670 [inline]
softirqs last disabled at (2093417): [<ffffffff813902ec>] run_ksoftirqd+0x8c/0x1b0 kernel/softirq.c:662
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&(&local->client_conns_lock)->rlock);
<Interrupt>
lock(&(&local->client_conns_lock)->rlock);
*** DEADLOCK ***
1 lock held by ksoftirqd/1/17:
#0: (rcu_callback){....}, at: [<ffffffff814e5703>] __rcu_reclaim kernel/rcu/rcu.h:185 [inline]
#0: (rcu_callback){....}, at: [<ffffffff814e5703>] rcu_do_batch kernel/rcu/tree.c:2699 [inline]
#0: (rcu_callback){....}, at: [<ffffffff814e5703>] invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline]
#0: (rcu_callback){....}, at: [<ffffffff814e5703>] __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline]
#0: (rcu_callback){....}, at: [<ffffffff814e5703>] rcu_process_callbacks+0x893/0x12b0 kernel/rcu/tree.c:2946
stack backtrace:
CPU: 1 PID: 17 Comm: ksoftirqd/1 Not tainted 4.14.171-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x142/0x197 lib/dump_stack.c:58
print_usage_bug.cold+0x330/0x42a kernel/locking/lockdep.c:2585
valid_state kernel/locking/lockdep.c:2598 [inline]
mark_lock_irq kernel/locking/lockdep.c:2792 [inline]
mark_lock+0xdbd/0x1240 kernel/locking/lockdep.c:3190
mark_irqflags kernel/locking/lockdep.c:3068 [inline]
__lock_acquire+0xb57/0x4620 kernel/locking/lockdep.c:3444
lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:152
spin_lock include/linux/spinlock.h:317 [inline]
rxrpc_put_one_client_conn net/rxrpc/conn_client.c:905 [inline]
rxrpc_put_client_conn+0x538/0xaa0 net/rxrpc/conn_client.c:957
rxrpc_put_connection net/rxrpc/ar-internal.h:862 [inline]
rxrpc_rcu_destroy_call+0x88/0x190 net/rxrpc/call_object.c:642
__rcu_reclaim kernel/rcu/rcu.h:195 [inline]
rcu_do_batch kernel/rcu/tree.c:2699 [inline]
invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline]
__rcu_process_callbacks kernel/rcu/tree.c:2929 [inline]
rcu_process_callbacks+0x7b8/0x12b0 kernel/rcu/tree.c:2946
__do_softirq+0x244/0x9a0 kernel/softirq.c:288
run_ksoftirqd kernel/softirq.c:670 [inline]
run_ksoftirqd+0x8c/0x1b0 kernel/softirq.c:662
smpboot_thread_fn+0x5f4/0x960 kernel/smpboot.c:164
kthread+0x319/0x430 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404