memory leak curl

Description

The following code:

<?php
function hdr_callback($ch, $data) {
if($GLOBALS['f_file']) {
fclose($GLOBALS['f_file']); $GLOBALS['f_file'] = 0;
curl_setopt($ch, CURLOPT_COOKIE, str_repeat("a", $FILE_size - 1));
}
}
include 'server.inc';
$host = curl_cli_server_start();
$temp_file = __DIR__ . '/body.tmp';
$url = "{$host}/get.inc?test=getpost";
$ch = curl_init();
$f_file = fopen($temp_file, "w") or die("failed to open file\n");
curl_setopt($ch, CURLOPT_HEADERFUNCTION, "hdr_callback");
curl_setopt($ch, CURLOPT_FILE, $f_file);
curl_setopt($ch, CURLOPT_URL, $url);
curl_exec($ch);

Resulted in this output:

==3585364==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 8192 byte(s) in 1 object(s) allocated from:
    #0 0x6810bd in malloc (/home/phpfuzz/WorkSpace/flowfusion/php-src/sapi/cli/php+0x6810bd)
    #1 0x7a5da52ffbf4 in _IO_file_doallocate libio/./libio/filedoalloc.c:101:7
    #2 0x7a5da530ecdf in _IO_doallocbuf libio/./libio/genops.c:347:9
    #3 0x7a5da530df5f in _IO_file_overflow libio/./libio/fileops.c:744:4
    #4 0x7a5da530c6d4 in _IO_new_file_xsputn libio/./libio/fileops.c:1243:11
    #5 0x7a5da530c6d4 in _IO_file_xsputn libio/./libio/fileops.c:1196:1
    #6 0x7a5da5300fd6 in fwrite libio/./libio/iofwrite.c:39:15
    #7 0x61e4af in fwrite (/home/phpfuzz/WorkSpace/flowfusion/php-src/sapi/cli/php+0x61e4af)
    #8 0xf5b6e2 in curl_write /home/phpfuzz/WorkSpace/flowfusion/php-src/ext/curl/interface.c:540:11
    #9 0x7a5da5ae391a  (/lib/x86_64-linux-gnu/libcurl.so.4+0x5191a)
    #10 0x7a5da5af6f30  (/lib/x86_64-linux-gnu/libcurl.so.4+0x64f30)
    #11 0x7a5da5ad8233  (/lib/x86_64-linux-gnu/libcurl.so.4+0x46233)
    #12 0x7a5da5adb4cd in curl_multi_perform (/lib/x86_64-linux-gnu/libcurl.so.4+0x494cd)
    #13 0x7a5da5ab7eb2 in curl_easy_perform (/lib/x86_64-linux-gnu/libcurl.so.4+0x25eb2)
    #14 0xf3b93a in zif_curl_exec /home/phpfuzz/WorkSpace/flowfusion/php-src/ext/curl/interface.c:2395:10
    #15 0x60230be in ZEND_DO_ICALL_SPEC_RETVAL_UNUSED_HANDLER /home/phpfuzz/WorkSpace/flowfusion/php-src/Zend/zend_vm_execute.h:1355:2
    #16 0x5b3f75b in execute_ex /home/phpfuzz/WorkSpace/flowfusion/php-src/Zend/zend_vm_execute.h:115722:12
    #17 0x5b41cec in zend_execute /home/phpfuzz/WorkSpace/flowfusion/php-src/Zend/zend_vm_execute.h:121434:2
    #18 0x68c4e09 in zend_execute_script /home/phpfuzz/WorkSpace/flowfusion/php-src/Zend/zend.c:1977:3
    #19 0x50a195a in php_execute_script_ex /home/phpfuzz/WorkSpace/flowfusion/php-src/main/main.c:2640:13
    #20 0x50a2a98 in php_execute_script /home/phpfuzz/WorkSpace/flowfusion/php-src/main/main.c:2680:9
    #21 0x68d9d1a in do_cli /home/phpfuzz/WorkSpace/flowfusion/php-src/sapi/cli/php_cli.c:951:5
    #22 0x68d40ff in main /home/phpfuzz/WorkSpace/flowfusion/php-src/sapi/cli/php_cli.c:1362:18
    #23 0x7a5da52aad8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
    #24 0x7a5da52aae3f in __libc_start_main csu/../csu/libc-start.c:392:3
    #25 0x6061f4 in _start (/home/phpfuzz/WorkSpace/flowfusion/php-src/sapi/cli/php+0x6061f4)

SUMMARY: AddressSanitizer: 8192 byte(s) leaked in 1 allocation(s).

To reproduce:

./php-src/sapi/cli/php  ./test.php

Commit:

e23c6222da50a2c5828a03ad701cd3351b13590d

Configurations:

CC="clang-12" CXX="clang++-12" CFLAGS="-DZEND_VERIFY_TYPE_INFERENCE" CXXFLAGS="-DZEND_VERIFY_TYPE_INFERENCE" ./configure --enable-debug --enable-address-sanitizer --enable-undefined-sanitizer --enable-re2c-cgoto --enable-fpm --enable-litespeed --enable-phpdbg-debug --enable-zts --enable-bcmath --enable-calendar --enable-dba --enable-dl-test --enable-exif --enable-ftp --enable-gd --enable-gd-jis-conv --enable-mbstring --enable-pcntl --enable-shmop --enable-soap --enable-sockets --enable-sysvmsg --enable-zend-test --with-zlib --with-bz2 --with-curl --with-enchant --with-gettext --with-gmp --with-mhash --with-ldap --with-libedit --with-readline --with-snmp --with-sodium --with-xsl --with-zip --with-mysqli --with-pdo-mysql --with-pdo-pgsql --with-pgsql --with-sqlite3 --with-pdo-sqlite --with-webp --with-jpeg --with-freetype --enable-sigchild --with-readline --with-pcre-jit --with-iconv

Operating System:

Ubuntu 20.04 Host, Docker 0599jiangyc/flowfusion:latest

This report is automatically generated by FlowFusion

PHP Version

nightly

Operating System

No response

Reproduce the report with ./php-src/sapi/cli/php ./test.php under the described AddressSanitizer configuration. Start at ext/curl/interface.c lines 540 and 2395, then trace the curl execution and file-writing path shown in the leak report. Done means the reproduction no longer reports the 8192-byte leak.