diff options
| -rw-r--r-- | fs/dcache.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index d071ea768057..03eb2c2a7e5b 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -2518,6 +2518,8 @@ static int prepend_path(const struct path *path, struct dentry *dentry = path->dentry; struct vfsmount *vfsmnt = path->mnt; struct mount *mnt = real_mount(vfsmnt); + char *orig_buffer = *buffer; + int orig_len = *buflen; bool slash = false; int error = 0; @@ -2525,6 +2527,14 @@ static int prepend_path(const struct path *path, struct dentry * parent; if (dentry == vfsmnt->mnt_root || IS_ROOT(dentry)) { + /* Escaped? */ + if (dentry != vfsmnt->mnt_root) { + *buffer = orig_buffer; + *buflen = orig_len; + slash = false; + error = 3; + goto global_root; + } /* Global root? */ if (!mnt_has_parent(mnt)) goto global_root; |