From: Vlad Yasevich <vladislav.yasevich@hp.com>
Date: Wed, 23 May 2007 15:11:37 +0000 (-0400)
Subject: [SCTP] Fix leak in sctp_getsockopt_local_addrs when copy_to_user fails
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=fe979ac169970b3d12facd6565766735862395c5;p=openwrt%2Fstaging%2Fblogic.git

[SCTP] Fix leak in sctp_getsockopt_local_addrs when copy_to_user fails

If the copy_to_user or copy_user calls fail in sctp_getsockopt_local_addrs(),
the function should free locally allocated storage before returning error.
Spotted by Coverity.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Acked-by: Sridhar Samudrala <sri@us.ibm.com>
---

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index a5b6e559451e..45510c46c223 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4352,11 +4352,12 @@ copy_getaddrs:
 		err = -EFAULT;
 		goto error;
 	}
-	if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num))
-		return -EFAULT;
+	if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num)) {
+		err = -EFAULT;
+		goto error;
+	}
 	if (put_user(bytes_copied, optlen))
-		return -EFAULT;
-
+		err = -EFAULT;
 error:
 	kfree(addrs);
 	return err;