6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Namjae Jeon linkinjeon@kernel.org
commit 53e3e5babc0963a92d856a5ec0ce92c59f54bc12 upstream.
Client can send empty newname string to ksmbd server. It will cause a kernel oops from d_alloc. This patch return the error when attempting to rename a file or directory with an empty new name string.
Cc: stable@vger.kernel.org Reported-by: Norbert Szetei norbert@doyensec.com Tested-by: Norbert Szetei norbert@doyensec.com Signed-off-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/smb/server/smb2pdu.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -632,6 +632,11 @@ smb2_get_name(const char *src, const int return name; }
+ if (*name == '\0') { + kfree(name); + return ERR_PTR(-EINVAL); + } + if (*name == '\') { pr_err("not allow directory name included leading slash\n"); kfree(name);