From: Serge E. Hallyn <serge@hallyn.com>
Date: Thu, 26 May 2011 20:25:05 +0000 (-0500)
Subject: Set cred->user_ns in key_replace_session_keyring
X-Git-Tag: v3.0-rc1~126
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f7285b5d631fd6096b11c6af0058ed3a2b30ef4e;p=pandora-kernel.git

Set cred->user_ns in key_replace_session_keyring

Since this cred was not created with copy_creds(), it needs to get
initialized.  Otherwise use of syscall(__NR_keyctl, KEYCTL_SESSION_TO_PARENT);
can lead to a NULL deref.  Thanks to Robert for finding this.

But introduced by commit 47a150edc2a ("Cache user_ns in struct cred").

Signed-off-by: Serge E. Hallyn <serge.hallyn@canonical.com>
Reported-by: Robert Święcki <robert@swiecki.net>
Cc: David Howells <dhowells@redhat.com>
Cc: stable@kernel.org (2.6.39)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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