From: Richard Guy Briggs <rgb@redhat.com>
Date: Sat, 15 Mar 2014 22:42:34 +0000 (-0400)
Subject: audit: get comm using lock to avoid race in string printing
X-Git-Tag: fixes-against-v3.18-rc2~31^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9eab339b197a6903043d272295dcb716ff739b21;p=pandora-kernel.git

audit: get comm using lock to avoid race in string printing

When task->comm is passed directly to audit_log_untrustedstring() without
getting a copy or using the task_lock, there is a race that could happen that
would output a NULL (\0) in the output string that would effectively truncate
the rest of the report text after the comm= field in the audit, losing fields.

Use get_task_comm() to get a copy while acquiring the task_lock to prevent
this and to prevent the result from being a mixture of old and new values of
comm.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
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