* [PATCH] rxrpc: Fix user ID check in rxrpc_service_prealloc_one
@ 2018-08-01 9:46 YueHaibing
2018-08-01 12:05 ` David Howells
0 siblings, 1 reply; 2+ messages in thread
From: YueHaibing @ 2018-08-01 9:46 UTC (permalink / raw)
To: davem, dhowells; +Cc: linux-kernel, netdev, linux-afs, YueHaibing
There just check the user ID isn't already in use, hence should
compare user_call_ID with xcall->user_call_ID, which is current
node's user_call_ID.
Fixes: 540b1c48c37a ("rxrpc: Fix deadlock between call creation and sendmsg/recvmsg")
Suggested-by: David Howells <dhowells@redhat.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
net/rxrpc/call_accept.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/rxrpc/call_accept.c b/net/rxrpc/call_accept.c
index a9a9be5..9d1e298 100644
--- a/net/rxrpc/call_accept.c
+++ b/net/rxrpc/call_accept.c
@@ -116,9 +116,9 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx,
while (*pp) {
parent = *pp;
xcall = rb_entry(parent, struct rxrpc_call, sock_node);
- if (user_call_ID < call->user_call_ID)
+ if (user_call_ID < xcall->user_call_ID)
pp = &(*pp)->rb_left;
- else if (user_call_ID > call->user_call_ID)
+ else if (user_call_ID > xcall->user_call_ID)
pp = &(*pp)->rb_right;
else
goto id_in_use;
--
2.7.0
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2018-08-01 9:46 [PATCH] rxrpc: Fix user ID check in rxrpc_service_prealloc_one YueHaibing
2018-08-01 12:05 ` David Howells
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