Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)

Edit report at https://bugs.php.net/bug.php?id=78630&edit=1 ID: 78630 Comment by: ilya at ilya dot pp dot ua Reported by: ilya at ilya dot pp dot ua Summary: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0) Status: Open Type: Bug Package: PCRE related Operating System: openSUSE Tumbleweed PHP Version: 7.3.10 Block user comment: N Private report: N New Comment: wget https://www.php.net/distributions/php-7.4.0RC3.tar.xz ... 404 Not a found Give me please, correct link to dowload 7.4.0RC3 Previous Comments: ------------------------------------------------------------------------ [2019-10-03 20:56:49] ilya at ilya dot pp dot ua > Do you know how opensuse builds pcre2? Do they use the bundled PHP library, or do they build a > separate pcre2 library and link PHP against it? I'm assuming it's the latter. See, please, pcre2 project: https://build.opensuse.org/package/show/devel:libraries:c_c++/pcre2 (click on pcre2.spec file) And see, please, php7 project: https://build.opensuse.org/package/show/devel:languages:php/php7 > Do you know if there is any security mechanism (such as SELinux) that might prevent the > allocation of writable executable memory? Judging by my installed packages, the system contains libapparmor and libselinux. But whether they are actually used and how I do not know. > If such a mechanism exists and is enabled by default, is pcre2 being compiled with > -DSLJIT_PROT_EXECUTABLE_ALLOCATOR=1, as is necessary to avoid W+X mmaps? https://build.opensuse.org/package/view_file/devel:libraries:c_c++/pcre2/pcre2.spec?expand=1 %configure \ %ifarch %{ix86} x86_64 %{arm} ppc ppc64 ppc64le mips sparc --enable-jit \ --enable-jit-sealloc \ %endif Most probably not. But you can always look at the current build log to be sure of this. https://build.opensuse.org/build/devel:libraries:c_c++/openSUSE_Factory/x86_64/pcre2/_log > Finally, do you know whether the first preg_* call already fails, or are there any preg_* calls > that succeed before the first failure? Not all. In my code, preg_match () is called once to check my email and it always causes an error. ------------------------------------------------------------------------ [2019-10-03 20:28:51] ilya at ilya dot pp dot ua > @nikic's two referenced commits are only for PHP 7.4.0rc3. @ilya, can you test with that > version? Problematically, openSUSE has many patches, and simply updating the source code will fail. I asked the maintainer to build 7.4.0RC3, if he has time for this I will test. > @ilya: It would be helpful to also provide an strace of the process, which should also show the > mmap failure. This is also problematic, I never used strace. Can you give detailed instructions on how to do it? ------------------------------------------------------------------------ [2019-10-03 20:17:31] nikic@php.net Do you know how opensuse builds pcre2? Do they use the bundled PHP library, or do they build a separate pcre2 library and link PHP against it? I'm assuming it's the latter. Do you know if there is any security mechanism (such as SELinux) that might prevent the allocation of writable executable memory? If such a mechanism exists and is enabled by default, is pcre2 being compiled with -DSLJIT_PROT_EXECUTABLE_ALLOCATOR=1, as is necessary to avoid W+X mmaps? Finally, do you know whether the first preg_* call already fails, or are there any preg_* calls that succeed before the first failure? ------------------------------------------------------------------------ [2019-10-03 20:08:57] ilya at ilya dot pp dot ua Description: ------------ https://bugzilla.suse.com/show_bug.cgi?id=1124446 In PHP 7.3 using pcre2 and using by default JIT compilation (pcre.jit=1) This leads to errors on phpMyAdmin login page like: Warning in ./libraries/classes/Config.php#201 preg_match(): JIT compilation failed: no more memory mod_fcgid: stderr: PHP Warning: preg_replace_callback(): JIT compilation failed: no more memory And for everything that uses preg_*() functions. php: 7.3.10 pcre2: 10.33 Server: Apache (mpm_event) + mod_fcgid + php-fastcgi If necessary, I will attach more information. Test script: --------------- phpMyAdmin latest version (4.9.1) login page and show this page and apache error_log Server: Apache (mpm_event) + mod_fcgid + php-fastcgi Expected result: ---------------- No errors. Actual result: -------------- Error on phpMyAdmin login page Warning in ./libraries/classes/Config.php#201 preg_match(): JIT compilation failed: no more memory And in apache error_log mod_fcgid: stderr: PHP Warning: preg_replace_callback(): JIT compilation failed: no more memory ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=78630&edit=1