diff options
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/namei.c b/fs/namei.c index 3b2b5c8e0ec7..ea6050b6134a 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -219,9 +219,10 @@ getname_kernel(const char * filename) if (len <= EMBEDDED_NAME_MAX) { result->name = (char *)result->iname; } else if (len <= PATH_MAX) { + const size_t size = offsetof(struct filename, iname[1]); struct filename *tmp; - tmp = kmalloc(sizeof(*tmp), GFP_KERNEL); + tmp = kmalloc(size, GFP_KERNEL); if (unlikely(!tmp)) { __putname(result); return ERR_PTR(-ENOMEM); @@ -585,9 +586,10 @@ static int __nd_alloc_stack(struct nameidata *nd) static bool path_connected(const struct path *path) { struct vfsmount *mnt = path->mnt; + struct super_block *sb = mnt->mnt_sb; - /* Only bind mounts can have disconnected paths */ - if (mnt->mnt_root == mnt->mnt_sb->s_root) + /* Bind mounts and multi-root filesystems can have disconnected paths */ + if (!(sb->s_iflags & SB_I_MULTIROOT) && (mnt->mnt_root == sb->s_root)) return true; return is_subdir(path->dentry, mnt->mnt_root); @@ -2015,6 +2017,9 @@ static const char *path_init(struct nameidata *nd, unsigned flags) int retval = 0; const char *s = nd->name->name; + if (!*s) + flags &= ~LOOKUP_RCU; + nd->last_type = LAST_ROOT; /* if there are only slashes... */ nd->flags = flags | LOOKUP_JUMPED | LOOKUP_PARENT; nd->depth = 0; |