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audit: Use current instead of NETLINK_CREDS() in audit_filter

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Get caller process uid and gid and pid values from the current task
instead of the NETLINK_CB.  This is simpler than passing NETLINK_CREDS
from from audit_receive_msg to audit_filter_user_rules and avoid the
chance of being hit by the occassional bugs in netlink uid/gid
credential passing.  This is a safe changes because all netlink
requests are processed in the task of the sending process.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2012-09-10 23:10:16 -07:00
parent 34e36d8ecb
commit 02276bda4a
3 changed files with 8 additions and 9 deletions
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2
kernel/audit.c
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@@ -744,7 +744,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (!audit_enabled && msg_type != AUDIT_USER_AVC)
return 0;
err = audit_filter_user(&NETLINK_CB(skb));
err = audit_filter_user();
if (err == 1) {
err = 0;
if (msg_type == AUDIT_USER_TTY) {