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net: amend the fix for SO_BSDCOMPAT gsopt infoleak

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The fix for CVE-2009-0676 (upstream commit df0bca04) is incomplete. Note
that the same problem of leaking kernel memory will reappear if someone
on some architecture uses struct timeval with some internal padding (for
example tv_sec 64-bit and tv_usec 32-bit) --- then, you are going to
leak the padded bytes to userspace.

Signed-off-by: Eugene Teo <eugeneteo@kernel.sg>
Reported-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eugene Teo
2009-02-23 15:38:41 -08:00
committed by David S. Miller
parent ebe47d47b7
commit 50fee1dec5
1 changed files with 1 additions and 1 deletions
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net/core/sock.c
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@@ -696,7 +696,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
if (len < 0) if (len < 0)
return -EINVAL; return -EINVAL;
v.val = 0; memset(&v, 0, sizeof(v));
switch(optname) { switch(optname) {
case SO_DEBUG: case SO_DEBUG: