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authorAl Viro <viro@parcelfarce.linux.theplanet.co.uk>2005-08-19 23:42:16 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-20 02:57:19 +0200
commit2fb1e3086df9b454538491fba8121298da37cd23 (patch)
treed84587462e0378c5aa9c5581d6920d76242b8c65
parentMerge master.kernel.org:/pub/scm/linux/kernel/git/bart/ide-2.6 (diff)
downloadlinux-2fb1e3086df9b454538491fba8121298da37cd23.tar.xz
linux-2fb1e3086df9b454538491fba8121298da37cd23.zip
[PATCH] jffs2: fix symlink error handling
The current calling conventions for ->follow_link() are already fairly complex. What we have is 1) you can return -error; then you must release nameidata yourself and ->put_link() will _not_ be called. 2) you can do nd_set_link(nd, ERR_PTR(-error)) and return 0 3) you can do nd_set_link(nd, path) and return 0 4) you can return 0 (after having moved nameidata yourself) jffs2 follow_link() is broken - it has an exit where it returns -EIO and leaks nameidata. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/jffs2/symlink.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/jffs2/symlink.c b/fs/jffs2/symlink.c
index 65ab6b001dca..073633e11ea9 100644
--- a/fs/jffs2/symlink.c
+++ b/fs/jffs2/symlink.c
@@ -30,6 +30,7 @@ struct inode_operations jffs2_symlink_inode_operations =
static int jffs2_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);
+ char *p = (char *)f->dents;
/*
* We don't acquire the f->sem mutex here since the only data we
@@ -45,13 +46,14 @@ static int jffs2_follow_link(struct dentry *dentry, struct nameidata *nd)
* nd_set_link() call.
*/
- if (!f->dents) {
+ if (!p) {
printk(KERN_ERR "jffs2_follow_link(): can't find symlink taerget\n");
- return -EIO;
+ p = ERR_PTR(-EIO);
+ } else {
+ D1(printk(KERN_DEBUG "jffs2_follow_link(): target path is '%s'\n", (char *) f->dents));
}
- D1(printk(KERN_DEBUG "jffs2_follow_link(): target path is '%s'\n", (char *) f->dents));
- nd_set_link(nd, (char *)f->dents);
+ nd_set_link(nd, p);
/*
* We unlock the f->sem mutex but VFS will use the f->dents string. This is safe