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authorDavid Herrmann <dh.herrmann@gmail.com>2016-02-02 18:17:54 +0100
committerDavid S. Miller <davem@davemloft.net>2016-02-07 14:06:26 -0500
commit3575dbf2cbbc8e598f17ec441aed526dbea0e1bd (patch)
tree8dac5377390bc6c58d30abf40b2eeb51573549a5 /net/unix
parentnet: Add support for fill_slave_info to VRF device (diff)
downloadlinux-dev-3575dbf2cbbc8e598f17ec441aed526dbea0e1bd.tar.xz
linux-dev-3575dbf2cbbc8e598f17ec441aed526dbea0e1bd.zip
net: drop write-only stack variable
Remove a write-only stack variable from unix_attach_fds(). This is a left-over from the security fix in: commit 712f4aad406bb1ed67f3f98d04c044191f0ff593 Author: willy tarreau <w@1wt.eu> Date: Sun Jan 10 07:54:56 2016 +0100 unix: properly account for FDs passed over unix sockets Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/unix')
-rw-r--r--net/unix/af_unix.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 49d5093eb055..b3745557fc89 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1534,7 +1534,6 @@ static int unix_attach_fds(struct scm_cookie *scm, struct sk_buff *skb)
{
int i;
unsigned char max_level = 0;
- int unix_sock_count = 0;
if (too_many_unix_fds(current))
return -ETOOMANYREFS;
@@ -1542,11 +1541,9 @@ static int unix_attach_fds(struct scm_cookie *scm, struct sk_buff *skb)
for (i = scm->fp->count - 1; i >= 0; i--) {
struct sock *sk = unix_get_socket(scm->fp->fp[i]);
- if (sk) {
- unix_sock_count++;
+ if (sk)
max_level = max(max_level,
unix_sk(sk)->recursion_level);
- }
}
if (unlikely(max_level > MAX_RECURSION_LEVEL))
return -ETOOMANYREFS;