Re: [PATCH] cifs: fix regression when mounting shares with prefix paths

On Fri, 30 Apr 2021 19:16:21 -0300, Paulo Alcantara wrote:

The commit 315db9a05b7a ("cifs: fix leak in cifs_smb3_do_mount() ctx") revealed an existing bug when mounting shares that contain a prefix path or DFS links.

Sorry for the mess. One question...

...

if (mntopts) { char *ip;

• cifs_dbg(FYI, "%s: mntopts=%s\n", __func__, mntopts);
  

  rc = smb3_parse_opt(mntopts, "ip", &ip);

• if (!rc && !cifs_convert_address((struct sockaddr *)&ctx->dstaddr, ip,
  

• 				 strlen(ip))) {
  

• 	cifs_dbg(VFS, "%s: failed to convert ip address\n", __func__);
  

• 	return -EINVAL;
  

• if (!rc) {
  

• 	rc = cifs_convert_address((struct sockaddr *)&ctx->dstaddr, ip, strlen(ip));
  

• 	kfree(ip);
  

• 	if (!rc) {
  

• 		cifs_dbg(VFS, "%s: failed to convert ip address\n", __func__);
  

• 		return -EINVAL;
  

• 	}
  

  } }

@@ -3189,7 +3198,7 @@ cifs_setup_volume_info(struct smb3_fs_context *ctx, const char *mntopts, const c return -EINVAL; }

• return rc;

• return 0;

}

It seems that smb3_parse_opt() errors will no longer be propagated here. Is that intentional?

Cheers, David