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Subject[PATCH 3.12 001/116] prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts
Date
3.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Al Viro <viro@zeniv.linux.org.uk>

commit ede4cebce16f5643c61aedd6d88d9070a1d23a68 upstream.

... and equivalent is needed in 3.12; it's broken there as well

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Michael Marineau <michael.marineau@coreos.com>
Tested-by: Waiman Long <Waiman.Long@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
fs/dcache.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2881,9 +2881,9 @@ static int prepend_path(const struct pat
const struct path *root,
char **buffer, int *buflen)
{
- struct dentry *dentry = path->dentry;
- struct vfsmount *vfsmnt = path->mnt;
- struct mount *mnt = real_mount(vfsmnt);
+ struct dentry *dentry;
+ struct vfsmount *vfsmnt;
+ struct mount *mnt;
int error = 0;
unsigned seq = 0;
char *bptr;
@@ -2893,6 +2893,9 @@ static int prepend_path(const struct pat
restart:
bptr = *buffer;
blen = *buflen;
+ dentry = path->dentry;
+ vfsmnt = path->mnt;
+ mnt = real_mount(vfsmnt);
read_seqbegin_or_lock(&rename_lock, &seq);
while (dentry != root->dentry || vfsmnt != root->mnt) {
struct dentry * parent;



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