From: David S. Miller <davem@sunset.davemloft.net>
Date: Tue, 30 Oct 2007 04:54:02 +0000 (-0700)
Subject: [NET]: Fix error reporting in sys_socketpair().
X-Git-Tag: archive/raspbian/4.9.13-1+rpi1~10^2~32934^2~6
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/%22/%22http:/www.example.com/cgi/%22?a=commitdiff_plain;h=bf3c23d171e35e6e168074a1514b0acd59cfd81a;p=linux-4.9.git

[NET]: Fix error reporting in sys_socketpair().

If either of the two sock_alloc_fd() calls fail, we
forget to update 'err' and thus we'll erroneously
return zero in these cases.

Based upon a report and patch from Rich Paul, and
commentary from Chuck Ebbert.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/socket.c b/net/socket.c
index 540013ea8620..5d879fd3d01d 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1250,11 +1250,14 @@ asmlinkage long sys_socketpair(int family, int type, int protocol,
 		goto out_release_both;
 
 	fd1 = sock_alloc_fd(&newfile1);
-	if (unlikely(fd1 < 0))
+	if (unlikely(fd1 < 0)) {
+		err = fd1;
 		goto out_release_both;
+	}
 
 	fd2 = sock_alloc_fd(&newfile2);
 	if (unlikely(fd2 < 0)) {
+		err = fd2;
 		put_filp(newfile1);
 		put_unused_fd(fd1);
 		goto out_release_both;