diff options
| -rw-r--r-- | fs/smb/server/smb2pdu.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c index f16f3da4ee3d..31ca0872b0fb 100644 --- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -2658,6 +2658,22 @@ out: return err; } +static bool smb2_is_private_ea(const char *name, size_t name_len) +{ + if (name_len == SD_PREFIX_LEN && + !strncasecmp(name, SD_PREFIX, SD_PREFIX_LEN)) + return true; + if (name_len == DOS_ATTRIBUTE_PREFIX_LEN && + !strncasecmp(name, DOS_ATTRIBUTE_PREFIX, + DOS_ATTRIBUTE_PREFIX_LEN)) + return true; + if (name_len >= STREAM_PREFIX_LEN && + !strncasecmp(name, STREAM_PREFIX, STREAM_PREFIX_LEN)) + return true; + + return false; +} + /** * smb2_set_ea() - handler for setting extended attributes using set * info command @@ -2699,6 +2715,10 @@ static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, rc = -EINVAL; break; } + if (smb2_is_private_ea(eabuf->name, eabuf->EaNameLength)) { + rc = -EACCES; + break; + } memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, @@ -5274,17 +5294,13 @@ static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) continue; - if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, - STREAM_PREFIX_LEN)) - continue; - if (req->InputBufferLength && strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, ea_req->EaNameLength)) continue; - if (!strncmp(&name[XATTR_USER_PREFIX_LEN], - DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) + if (smb2_is_private_ea(&name[XATTR_USER_PREFIX_LEN], + name_len - XATTR_USER_PREFIX_LEN)) continue; if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) |