Messages in this thread Patch in this message | | | Date | Tue, 24 Feb 2009 00:41:12 +0800 | From | Eugene Teo <> | Subject | 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>
diff --git a/net/core/sock.c b/net/core/sock.c index 6f2e133..913c95f 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -696,7 +696,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname, if (len < 0) return -EINVAL; - v.val = 0; + memset(&v, 0, sizeof(v)); switch(optname) { case SO_DEBUG:
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