Fix incorrect check in phar tar parsing

The entry.flags was used to check whether the entry has the directory
flag. The flags however were masked to only contain the permissions. We
need to check the mode, before the permission masking, instead of the
flags to check whether it is a directory.

Closes GH-10464

Signed-off-by: George Peter Banyard <girgias@php.net>

NEWS

@@ -17,6 +17,9 @@ PHP                                                                        NEWS
 - Opcache:
   . Fix incorrect page_size check. (nielsdos)
 
+- Phar:
+  . Fix incorrect check in phar tar parsing. (nielsdos)
+
 - Standard:
   . Fixed bug GH-10292 (Made the default value of the first param of srand() and
     mt_srand() unknown). (kocsismate)

ext/phar/tar.c

@@ -478,14 +478,15 @@ int phar_parse_tarfile(php_stream* fp, char *fname, size_t fname_len, char *alia
 			return FAILURE;
 		}
 
+		uint32_t entry_mode = phar_tar_number(hdr->mode, sizeof(hdr->mode));
 		entry.tar_type = ((old & (hdr->typeflag == '\0')) ? TAR_FILE : hdr->typeflag);
 		entry.offset = entry.offset_abs = pos; /* header_offset unused in tar */
 		entry.fp_type = PHAR_FP;
-		entry.flags = phar_tar_number(hdr->mode, sizeof(hdr->mode)) & PHAR_ENT_PERM_MASK;
+		entry.flags = entry_mode & PHAR_ENT_PERM_MASK;
 		entry.timestamp = phar_tar_number(hdr->mtime, sizeof(hdr->mtime));
 		entry.is_persistent = myphar->is_persistent;
 
-		if (old && entry.tar_type == TAR_FILE && S_ISDIR(entry.flags)) {
+		if (old && entry.tar_type == TAR_FILE && S_ISDIR(entry_mode)) {
 			entry.tar_type = TAR_DIR;
 		}