Commit 8e0cd952 authored by Linus Torvalds's avatar Linus Torvalds

Merge tag 'audit-pr-20210830' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit

Pull audit updates from Paul Moore:
 "Two patches in the audit pull request for v5.15; one is trivial
  ("header protection") but the second is a real patch that fixes a
  refcounting problem.

  The refcount fix normally would have been sent up during the -rcX
  cycle, but since we merged it less than a week before v5.14 proper I
  felt it was better to wait for the merge window to open; the patch is
  marked with the usual -stable markings"

* tag 'audit-pr-20210830' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
  audit: move put_tree() to avoid trim_trees refcount underflow and UAF
  audit: add header protection to kernel/audit.h
parents befa491c 67d69e9d
......@@ -6,6 +6,9 @@
* Copyright 2005 IBM Corporation
*/
#ifndef _KERNEL_AUDIT_H_
#define _KERNEL_AUDIT_H_
#include <linux/fs.h>
#include <linux/audit.h>
#include <linux/skbuff.h>
......@@ -331,3 +334,5 @@ extern int audit_filter(int msgtype, unsigned int listtype);
extern void audit_ctl_lock(void);
extern void audit_ctl_unlock(void);
#endif
......@@ -593,7 +593,6 @@ static void prune_tree_chunks(struct audit_tree *victim, bool tagged)
spin_lock(&hash_lock);
}
spin_unlock(&hash_lock);
put_tree(victim);
}
/*
......@@ -602,6 +601,7 @@ static void prune_tree_chunks(struct audit_tree *victim, bool tagged)
static void prune_one(struct audit_tree *victim)
{
prune_tree_chunks(victim, false);
put_tree(victim);
}
/* trim the uncommitted chunks from tree */
......
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