From 795e2fe0a3b69dbc040d7efcf517e0cbad6901d0 Mon Sep 17 00:00:00 2001 From: David Howells Date: Sat, 28 Mar 2009 23:23:01 +0000 Subject: 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 Signed-off-by: Hugh Dickins Cc: stable@kernel.org Signed-off-by: Linus Torvalds --- include/linux/fs_struct.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'include/linux/fs_struct.h') diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h index a97c053d3a9a..18b467dbe278 100644 --- a/include/linux/fs_struct.h +++ b/include/linux/fs_struct.h @@ -4,7 +4,10 @@ #include 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; -- cgit v1.2.3