[Cluster-devel] [PATCH dlm/next 15/18] fs: dlm: use sock2con without checking null
Alexander Aring
aahringo at redhat.com
Thu Nov 17 22:11:54 UTC 2022
This patch removes null checks on private data for sockets. If we have a
null dereference there we having a bug in our implementation that such
callback occurs in this state.
Signed-off-by: Alexander Aring <aahringo at redhat.com>
---
fs/dlm/lowcomms.c | 17 ++++-------------
1 file changed, 4 insertions(+), 13 deletions(-)
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index ed3cd3757199..677e31144ca0 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -472,10 +472,9 @@ int dlm_lowcomms_addr(int nodeid, struct sockaddr_storage *addr, int len)
/* Data available on socket or listen socket received a connect */
static void lowcomms_data_ready(struct sock *sk)
{
- struct connection *con;
+ struct connection *con = sock2con(sk);
- con = sock2con(sk);
- if (con && !test_and_set_bit(CF_READ_PENDING, &con->flags))
+ if (!test_and_set_bit(CF_READ_PENDING, &con->flags))
queue_work(recv_workqueue, &con->rwork);
}
@@ -486,11 +485,7 @@ static void lowcomms_listen_data_ready(struct sock *sk)
static void lowcomms_write_space(struct sock *sk)
{
- struct connection *con;
-
- con = sock2con(sk);
- if (!con)
- return;
+ struct connection *con = sock2con(sk);
if (!test_and_set_bit(CF_CONNECTED, &con->flags)) {
log_print("connected to node %d", con->nodeid);
@@ -573,14 +568,10 @@ int dlm_lowcomms_nodes_set_mark(int nodeid, unsigned int mark)
static void lowcomms_error_report(struct sock *sk)
{
- struct connection *con;
+ struct connection *con = sock2con(sk);
void (*orig_report)(struct sock *) = NULL;
struct inet_sock *inet;
- con = sock2con(sk);
- if (con == NULL)
- goto out;
-
orig_report = listen_sock.sk_error_report;
inet = inet_sk(sk);
--
2.31.1
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