From: Miklos Szeredi <mszeredi@suse.cz>
Date: Mon, 21 May 2012 15:30:11 +0000 (+0200)
Subject: vfs: do_last(): check LOOKUP_DIRECTORY
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=af2f55426d1d888dcc0ba8dc9e9deb49fae38e38;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

vfs: do_last(): check LOOKUP_DIRECTORY

Check for ENOTDIR before finishing open.  This allows this code to be shared
between O_CREAT and plain opens.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/namei.c b/fs/namei.c
index a7e994bb78c2..4767c0588b6e 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2386,6 +2386,9 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
 	error = -EISDIR;
 	if (S_ISDIR(nd->inode->i_mode))
 		goto exit;
+	error = -ENOTDIR;
+	if ((nd->flags & LOOKUP_DIRECTORY) && !nd->inode->i_op->lookup)
+		goto exit;
 ok:
 	if (!S_ISREG(nd->inode->i_mode))
 		will_truncate = 0;