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| author | Christoph Hellwig <hch@infradead.org> | 2012-06-18 10:47:03 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-07-14 16:35:35 +0400 |
| commit | 408ef013cc9e2f94a14f7ccbbe52ddfb18437a99 (patch) | |
| tree | 3168e06e8090210a59af788ca97cd40d87b5282e | |
| parent | ac481d6ca4081bdd348cbd84963d1ece843a3407 (diff) | |
| download | linux-408ef013cc9e2f94a14f7ccbbe52ddfb18437a99.tar.gz linux-408ef013cc9e2f94a14f7ccbbe52ddfb18437a99.tar.bz2 linux-408ef013cc9e2f94a14f7ccbbe52ddfb18437a99.zip | |
fs: move path_put on failure out of ->follow_link
Currently the non-nd_set_link based versions of ->follow_link are expected
to do a path_put(&nd->path) on failure. This calling convention is unexpected,
undocumented and doesn't match what the nd_set_link-based instances do.
Move the path_put out of the only non-nd_set_link based ->follow_link
instance into the caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/namei.c | 3 | ||||
| -rw-r--r-- | fs/proc/base.c | 12 |
2 files changed, 9 insertions, 6 deletions
diff --git a/fs/namei.c b/fs/namei.c index 6b29a51bef5d..a9b94c62c303 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -624,7 +624,7 @@ follow_link(struct path *link, struct nameidata *nd, void **p) *p = dentry->d_inode->i_op->follow_link(dentry, nd); error = PTR_ERR(*p); if (IS_ERR(*p)) - goto out_put_link; + goto out_put_nd_path; error = 0; s = nd_get_link(nd); @@ -646,7 +646,6 @@ follow_link(struct path *link, struct nameidata *nd, void **p) out_put_nd_path: path_put(&nd->path); -out_put_link: path_put(link); return error; } diff --git a/fs/proc/base.c b/fs/proc/base.c index 8eaa5ea1c613..3bd5ac1ff018 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1427,16 +1427,20 @@ static int proc_exe_link(struct dentry *dentry, struct path *exe_path) static void *proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd) { struct inode *inode = dentry->d_inode; + struct path path; int error = -EACCES; - /* We don't need a base pointer in the /proc filesystem */ - path_put(&nd->path); - /* Are we allowed to snoop on the tasks file descriptors? */ if (!proc_fd_access_allowed(inode)) goto out; - error = PROC_I(inode)->op.proc_get_link(dentry, &nd->path); + error = PROC_I(inode)->op.proc_get_link(dentry, &path); + if (error) + goto out; + + path_put(&nd->path); + nd->path = path; + return NULL; out: return ERR_PTR(error); } |