Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
  Fixed bug #78910
  Fix #78878: Buffer underflow in bc_shift_addsub
  Fix test
  Fix #78862: link() silently truncates after a null byte on Windows
  Fix #78863: DirectoryIterator class silently truncates after a null byte
  Fix #78943: mail() may release string with refcount==1 twice

Author: smalyshev

ext/bcmath/libbcmath/src/str2num.c

@@ -56,9 +56,9 @@ bc_str2num (bc_num *num, char *str, int scale)
   zero_int = FALSE;
   if ( (*ptr == '+') || (*ptr == '-'))  ptr++;  /* Sign */
   while (*ptr == '0') ptr++;			/* Skip leading zeros. */
-  while (isdigit((int)*ptr)) ptr++, digits++;	/* digits */
+  while (*ptr >= '0' && *ptr <= '9') ptr++, digits++;	/* digits */
   if (*ptr == '.') ptr++;			/* decimal point */
-  while (isdigit((int)*ptr)) ptr++, strscale++;	/* digits */
+  while (*ptr >= '0' && *ptr <= '9') ptr++, strscale++;	/* digits */
   if ((*ptr != '\0') || (digits+strscale == 0))
     {
       *num = bc_copy_num (BCG(_zero_));

ext/bcmath/tests/bug78878.phpt

@@ -0,0 +1,13 @@
+--TEST--
+Bug #78878 (Buffer underflow in bc_shift_addsub)
+--SKIPIF--
+<?php
+if (!extension_loaded('bcmath')) die('skip bcmath extension not available');
+?>
+--FILE--
+<?php
+print @bcmul("\xB26483605105519922841849335928742092", bcpowmod(2, 65535, -4e-4));
+?>
+--EXPECT--
+bc math warning: non-zero scale in modulus
+0

ext/exif/exif.c

@@ -3129,7 +3129,10 @@ static int exif_process_IFD_in_MAKERNOTE(image_info_type *ImageInfo, char * valu
 		/*exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "check (%s)", maker_note->make?maker_note->make:"");*/
 		if (maker_note->make && (!ImageInfo->make || strcmp(maker_note->make, ImageInfo->make)))
 			continue;
-		if (maker_note->id_string && strncmp(maker_note->id_string, value_ptr, maker_note->id_string_len))
+		if (maker_note->model && (!ImageInfo->model || strcmp(maker_note->model, ImageInfo->model)))
+			continue;
+		if (maker_note->id_string && value_len >= maker_note->id_string_len
+				&& strncmp(maker_note->id_string, value_ptr, maker_note->id_string_len))
 			continue;
 		break;
 	}

ext/exif/tests/bug78910.phpt

@@ -0,0 +1,17 @@
+--TEST--
+Bug #78910: Heap-buffer-overflow READ in exif (OSS-Fuzz #19044)
+--FILE--
+<?php
+
+var_dump(exif_read_data('data:image/jpg;base64,TU0AKgAAAAwgICAgAAIBDwAEAAAAAgAAACKSfCAgAAAAAEZVSklGSUxN'));
+
+?>
+--EXPECTF--
+Notice: exif_read_data(): Read from TIFF: tag(0x927C, MakerNote  ): Illegal format code 0x2020, switching to BYTE in %s on line %d
+
+Warning: exif_read_data(): Process tag(x927C=MakerNote  ): Illegal format code 0x2020, suppose BYTE in %s on line %d
+
+Warning: exif_read_data(): IFD data too short: 0x0000 offset 0x000C in %s on line %d
+
+Warning: exif_read_data(): Invalid TIFF file in %s on line %d
+bool(false)

ext/spl/spl_directory.c

@@ -708,10 +708,10 @@ void spl_filesystem_object_construct(INTERNAL_FUNCTION_PARAMETERS, zend_long cto
 
 	if (SPL_HAS_FLAG(ctor_flags, DIT_CTOR_FLAGS)) {
 		flags = SPL_FILE_DIR_KEY_AS_PATHNAME|SPL_FILE_DIR_CURRENT_AS_FILEINFO;
-		parsed = zend_parse_parameters(ZEND_NUM_ARGS(), "s|l", &path, &len, &flags);
+		parsed = zend_parse_parameters(ZEND_NUM_ARGS(), "p|l", &path, &len, &flags);
 	} else {
 		flags = SPL_FILE_DIR_KEY_AS_PATHNAME|SPL_FILE_DIR_CURRENT_AS_SELF;
-		parsed = zend_parse_parameters(ZEND_NUM_ARGS(), "s", &path, &len);
+		parsed = zend_parse_parameters(ZEND_NUM_ARGS(), "p", &path, &len);
 	}
 	if (SPL_HAS_FLAG(ctor_flags, SPL_FILE_DIR_SKIPDOTS)) {
 		flags |= SPL_FILE_DIR_SKIPDOTS;

ext/spl/tests/bug54291.phpt

@@ -5,7 +5,7 @@ Bug #54291 (Crash iterating DirectoryIterator for dir name starting with \0)
 $dir = new DirectoryIterator("\x00/abc");
 $dir->isFile();
 --EXPECTF--
-Fatal error: Uncaught UnexpectedValueException: Failed to open directory "" in %s:%d
+Fatal error: Uncaught UnexpectedValueException: DirectoryIterator::__construct() expects parameter 1 to be a valid path, string given in %s:%d
 Stack trace:
 #0 %s(%d): DirectoryIterator->__construct('\x00/abc')
 #1 {main}

ext/spl/tests/bug78863.phpt

@@ -0,0 +1,31 @@
+--TEST--
+Bug #78863 (DirectoryIterator class silently truncates after a null byte)
+--FILE--
+<?php
+$dir = __DIR__ . '/bug78863';
+mkdir($dir);
+touch("$dir/bad");
+mkdir("$dir/sub");
+touch("$dir/sub/good");
+
+$it = new DirectoryIterator(__DIR__ . "/bug78863\0/sub");
+foreach ($it as $fileinfo) {
+    if (!$fileinfo->isDot()) {
+        var_dump($fileinfo->getFilename());
+    }
+}
+?>
+--EXPECTF--
+Fatal error: Uncaught UnexpectedValueException: DirectoryIterator::__construct() expects parameter 1 to be a valid path, string given in %s:%d
+Stack trace:
+#0 %s(%d): DirectoryIterator->__construct('%s')
+#1 {main}
+  thrown in %s on line %d
+--CLEAN--
+<?php
+$dir = __DIR__ . '/bug78863';
+unlink("$dir/sub/good");
+rmdir("$dir/sub");
+unlink("$dir/bad");
+rmdir($dir);
+?>

ext/standard/tests/file/windows_links/bug78862.phpt

@@ -0,0 +1,17 @@
+--TEST--
+Bug #78862 (link() silently truncates after a null byte on Windows)
+--FILE--
+<?php
+file_put_contents(__DIR__ . '/bug78862.target', 'foo');
+var_dump(link(__DIR__ . "/bug78862.target\0more", __DIR__ . "/bug78862.link\0more"));
+var_dump(file_exists(__DIR__ . '/bug78862.link'));
+?>
+--EXPECTF--
+Warning: link() expects parameter 1 to be a valid path, string given in %s on line %d
+NULL
+bool(false)
+--CLEAN--
+<?php
+unlink(__DIR__ . '/bug78862.target');
+unlink(__DIR__ . '/bug78862.link');
+?>

win32/sendmail.c

@@ -207,9 +207,6 @@ PHPAPI int TSendMail(char *host, int *error, char **error_message,
 		/* Create a lowercased header for all the searches so we're finally case
 		 * insensitive when searching for a pattern. */
 		headers_lc = zend_string_tolower(headers_trim);
-		if (headers_lc == headers_trim) {
-			zend_string_release_ex(headers_lc, 0);
-		}
 	}
 
 	/* Fall back to sendmail_from php.ini setting */