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cifs: fix workstation_name for multiuser mounts

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Set workstation_name from the master_tcon for multiuser mounts.

Just in case, protect size_of_ntlmssp_blob against a NULL workstation_name.

Fixes: 49bd49f983 ("cifs: send workstation name during ntlmssp session setup")
Cc: stable@vger.kernel.org # 5.16
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Ryan Bair <ryandbair@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ryan Bair 2021-12-22 11:04:05 -05:00 committed by Steve French
parent 40c845c176
commit d3b331fb51
2 changed files with 18 additions and 1 deletions
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13
fs/cifs/connect.c
View File

@ -1977,6 +1977,19 @@ cifs_set_cifscreds(struct smb3_fs_context *ctx, struct cifs_ses *ses)
}
}
ctx->workstation_name = kstrdup(ses->workstation_name, GFP_KERNEL);
if (!ctx->workstation_name) {
cifs_dbg(FYI, "Unable to allocate memory for workstation_name\n");
rc = -ENOMEM;
kfree(ctx->username);
ctx->username = NULL;
kfree_sensitive(ctx->password);
ctx->password = NULL;
kfree(ctx->domainname);
ctx->domainname = NULL;
goto out_key_put;
}
out_key_put:
up_read(&key->sem);
key_put(key);

6
fs/cifs/sess.c
View File

@ -713,7 +713,11 @@ static int size_of_ntlmssp_blob(struct cifs_ses *ses, int base_size)
else
sz += sizeof(__le16);
sz += sizeof(__le16) * strnlen(ses->workstation_name, CIFS_MAX_WORKSTATION_LEN);
if (ses->workstation_name)
sz += sizeof(__le16) * strnlen(ses->workstation_name,
CIFS_MAX_WORKSTATION_LEN);
else
sz += sizeof(__le16);
return sz;
}