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| author | Steve French <sfrench@us.ibm.com> | 2006-04-21 18:18:37 +0000 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2006-04-21 18:18:37 +0000 |
| commit | 296034f7de8bdf111984ce1630ac598a9c94a253 (patch) | |
| tree | b8918c659c780f8fcdf3d8d82385da14a9fc7176 | |
| parent | 0bd4fa977f81c914eb8bada00284d0933825900e (diff) | |
| download | linux-3.10-296034f7de8bdf111984ce1630ac598a9c94a253.tar.gz linux-3.10-296034f7de8bdf111984ce1630ac598a9c94a253.tar.bz2 linux-3.10-296034f7de8bdf111984ce1630ac598a9c94a253.zip | |
[CIFS] Don't allow a backslash in a path component
Unless Posix paths have been negotiated, the backslash, "\", is not a valid
character in a path component.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
| -rw-r--r-- | fs/cifs/dir.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index 3830dfeb31c..82315edc77d 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -436,6 +436,20 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, struct name cifs_sb = CIFS_SB(parent_dir_inode->i_sb); pTcon = cifs_sb->tcon; + /* + * Don't allow the separator character in a path component. + * The VFS will not allow "/", but "\" is allowed by posix. + */ + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { + int i; + for (i = 0; i < direntry->d_name.len; i++) + if (direntry->d_name.name[i] == '\\') { + cFYI(1, ("Invalid file name")); + FreeXid(xid); + return ERR_PTR(-EINVAL); + } + } + /* can not grab the rename sem here since it would deadlock in the cases (beginning of sys_rename itself) in which we already have the sb rename sem */ |