Commit 795e2fe0 authored Mar 28, 2009 by David Howells Committed by Linus Torvalds Mar 28, 2009

Annotate struct fs_struct's usage count restriction



Annotate struct fs_struct's usage count to indicate the restrictions upon it.
It may not be incremented, except by clone(CLONE_FS), as this affects the
check in check_unsafe_exec() in fs/exec.c.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 7c2c7d99

include/linux/fs_struct.h

+4 −1

Original line number	Diff line number	Diff line
		@@ -4,7 +4,10 @@
		#include <linux/path.h>

		struct fs_struct {
		atomic_t count;
		atomic_t count; /* This usage count is used by check_unsafe_exec() for
		* security checking purposes - therefore it may not be
		* incremented, except by clone(CLONE_FS).
		*/
		rwlock_t lock;
		int umask;
		struct path root, pwd;