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[PATCH] honour MNT_NOEXEC for access()

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Make access(X_OK) take the "noexec" mount option into account.

Signed-off-by: Stas Sergeev <stsp@aknet.ru>
Cc: Jakub Jelinek <jakub@redhat.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Ulrich Drepper <drepper@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Stas Sergeev 2006-12-06 20:35:25 -08:00 committed by Linus Torvalds
parent ed07536ed6
commit 317a40ac22
1 changed files with 4 additions and 2 deletions
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6
fs/namei.c
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@ -249,9 +249,11 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
/*
* MAY_EXEC on regular files requires special handling: We override
* filesystem execute permissions if the mode bits aren't set.
* filesystem execute permissions if the mode bits aren't set or
* the fs is mounted with the "noexec" flag.
*/
if ((mask & MAY_EXEC) && S_ISREG(mode) && !(mode & S_IXUGO))
if ((mask & MAY_EXEC) && S_ISREG(mode) && (!(mode & S_IXUGO) ||
(nd && nd->mnt && (nd->mnt->mnt_flags & MNT_NOEXEC))))
return -EACCES;
/* Ordinary permission routines do not understand MAY_APPEND. */