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authortsutomu.owa@toshiba.co.jp <tsutomu.owa@toshiba.co.jp>2017-09-12 09:01:38 +0000
committerDavid Teigland <teigland@redhat.com>2017-09-25 12:45:21 -0500
commit3421fb15be01ff4714fed5a5d6db64849b59a1fd (patch)
treed9b920648f4ecdf68e5bbcc2c3d1485989363970 /fs/dlm
parent294e7e458763dc1d229cbbe7147a6034bfc6e39a (diff)
downloadlinux-3421fb15be01ff4714fed5a5d6db64849b59a1fd.tar.bz2
DLM: fix memory leak in tcp_accept_from_sock()
The sk member of the socket generated by sock_create_kern() is overwritten by ops->accept(). So the previous sk will not be released. We use kernel_accept() instead of sock_create_kern() and ops->accept(). Signed-off-by: Tadashi Miyauchi <miyauchi@toshiba-tops.co.jp> Signed-off-by: Tsutomu Owa <tsutomu.owa@toshiba.co.jp> Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm')
-rw-r--r--fs/dlm/lowcomms.c21
1 files changed, 7 insertions, 14 deletions
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 215515198edb..a464a8c446ab 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -732,22 +732,14 @@ static int tcp_accept_from_sock(struct connection *con)
}
mutex_unlock(&connections_lock);
- memset(&peeraddr, 0, sizeof(peeraddr));
- result = sock_create_lite(dlm_local_addr[0]->ss_family,
- SOCK_STREAM, IPPROTO_TCP, &newsock);
- if (result < 0)
- return -ENOMEM;
-
mutex_lock_nested(&con->sock_mutex, 0);
- result = -ENOTCONN;
- if (con->sock == NULL)
- goto accept_err;
-
- newsock->type = con->sock->type;
- newsock->ops = con->sock->ops;
+ if (!con->sock) {
+ mutex_unlock(&con->sock_mutex);
+ return -ENOTCONN;
+ }
- result = con->sock->ops->accept(con->sock, newsock, O_NONBLOCK, true);
+ result = kernel_accept(con->sock, &newsock, O_NONBLOCK);
if (result < 0)
goto accept_err;
@@ -844,7 +836,8 @@ static int tcp_accept_from_sock(struct connection *con)
accept_err:
mutex_unlock(&con->sock_mutex);
- sock_release(newsock);
+ if (newsock)
+ sock_release(newsock);
if (result != -EAGAIN)
log_print("error accepting connection from node: %d", result);