Segfault in php-fpm 8.1 on Linux

[nono-gdv]

Description

Hello,

Since migrating a big(ish) app on PHP 8.1, we get repeated segfaults, a few times per day (no more than 25 segfaults per day per server, for a few million hits per day per server). Here is a sample stack trace:

#0  0x00007f3ed8800556 in zend_accel_class_hash_copy (source=0x46736bb0, source=0x46736bb0, target=0x55ffcca9c330) at ./Zend/zend_types.h:1173
1173            return p->refcount;

(gdb) bt
#0  0x00007f3ed8800556 in zend_accel_class_hash_copy (source=0x46736bb0, source=0x46736bb0, target=0x55ffcca9c330) at ./Zend/zend_types.h:1173
#1  zend_accel_load_script (persistent_script=persistent_script@entry=0x46736a80, from_shared_memory=from_shared_memory@entry=1)
    at ./ext/opcache/zend_accelerator_util_funcs.c:230
#2  0x00007f3ed87eed26 in persistent_compile_file (type=<optimized out>, file_handle=<optimized out>) at ./ext/opcache/ZendAccelerator.c:2240
#3  persistent_compile_file (file_handle=<optimized out>, type=<optimized out>) at ./ext/opcache/ZendAccelerator.c:1951
#4  0x000055ffcc3edef8 in compile_filename (type=type@entry=2, filename=filename@entry=0x7f3ed210d820) at ./Zend/zend_language_scanner.c:707
#5  0x000055ffcc45ae40 in zend_include_or_eval (inc_filename_zv=<optimized out>, type=2) at ./Zend/zend_execute.c:4617
#6  0x000055ffcc4693ba in ZEND_INCLUDE_OR_EVAL_SPEC_CV_HANDLER () at ./Zend/zend_vm_execute.h:38713
#7  0x000055ffcc48f357 in execute_ex (ex=0x46736ce0) at ./Zend/zend_vm_execute.h:59122
#8  0x000055ffcc41b46e in zend_call_function (fci=<optimized out>, fci_cache=<optimized out>) at ./Zend/zend_execute_API.c:908
#9  0x000055ffcc41b785 in zend_call_known_function (fn=0x7f3ed8c05cd8, object=<optimized out>, called_scope=<optimized out>, retval_ptr=retval_ptr@entry=0x0, 
    param_count=param_count@entry=1, params=params@entry=0x7fff83b4f4e0, named_params=0x0) at ./Zend/zend_execute_API.c:997
#10 0x000055ffcc31b66a in spl_perform_autoload (class_name=0x40e9f288, lc_name=0x40e9f2c8) at ./ext/spl/php_spl.c:433
#11 0x000055ffcc41a6b6 in zend_lookup_class_ex (name=name@entry=0x40e9f288, key=0x40e9f2c8, flags=flags@entry=512) at ./Zend/zend_execute_API.c:1141
#12 0x000055ffcc41ba70 in zend_fetch_class_by_name (class_name=0x40e9f288, key=<optimized out>, fetch_type=fetch_type@entry=512)
    at ./Zend/zend_execute_API.c:1601
#13 0x000055ffcc466dd7 in ZEND_INIT_STATIC_METHOD_CALL_SPEC_CONST_CONST_HANDLER () at ./Zend/zend_vm_execute.h:6778
#14 0x000055ffcc48fac0 in execute_ex (ex=0x46736ce0) at ./Zend/zend_vm_execute.h:56351
#15 0x000055ffcc41b46e in zend_call_function (fci=fci@entry=0x7fff83b4f770, fci_cache=<optimized out>, fci_cache@entry=0x7f3ed21b60d0)
    at ./Zend/zend_execute_API.c:908
#16 0x00007f3ed8754a0d in curl_write_header (data=data@entry=0x55ffccb729e0 "\r\n", size=size@entry=1, nmemb=nmemb@entry=2, ctx=0x7f3ed8cc2a80)
    at ./ext/curl/interface.c:1596
#17 0x00007f3ed86c572c in chop_write (conn=0x55ffcce9ea80, conn=0x55ffcce9ea80, olen=2, optr=0x55ffccb729e0 "\r\n", type=2) at sendf.c:623
#18 Curl_client_write (conn=0x55ffcce9ea80, type=2, ptr=0x55ffccb729e0 "\r\n", len=len@entry=2) at sendf.c:679
#19 0x00007f3ed86c3a72 in Curl_http_readwrite_headers (data=data@entry=0x55ffcce92f90, conn=conn@entry=0x55ffcce9ea80, nread=nread@entry=0x7fff83b4f960, 
    stop_reading=stop_reading@entry=0x7fff83b4f95f) at http.c:3405
#20 0x00007f3ed86d7778 in readwrite_data (comeback=0x7fff83b4f9eb, done=0x7fff83b4f9ea, didwhat=<synthetic pointer>, k=0x55ffcce93088, conn=0x55ffcce9ea80, 
    data=0x55ffcce92f90) at transfer.c:677
#21 Curl_readwrite (conn=0x55ffcce9ea80, data=data@entry=0x55ffcce92f90, done=done@entry=0x7fff83b4f9ea, comeback=comeback@entry=0x7fff83b4f9eb)
    at transfer.c:1294
#22 0x00007f3ed86e1933 in multi_runsingle (multi=multi@entry=0x55ffcce98a20, now=..., data=data@entry=0x55ffcce92f90) at multi.c:1933
#23 0x00007f3ed86e2bd9 in curl_multi_perform (multi=multi@entry=0x55ffcce98a20, running_handles=running_handles@entry=0x7fff83b4fb64) at multi.c:2218
#24 0x00007f3ed86d9742 in easy_transfer (multi=0x55ffcce98a20) at easy.c:686
#25 easy_perform (events=false, data=0x55ffcce92f90) at easy.c:780
#26 curl_easy_perform (data=0x55ffcce92f90) at easy.c:799
#27 0x00007f3ed8755b24 in zif_curl_exec (execute_data=0x7f3ed8c16750, return_value=0x7fff83b4fcc0) at ./ext/curl/interface.c:3063
#28 0x000055ffcc490eba in ZEND_DO_ICALL_SPEC_RETVAL_UNUSED_HANDLER () at ./Zend/zend_vm_execute.h:1235
#29 execute_ex (ex=0x46736ce0) at ./Zend/zend_vm_execute.h:55752
#30 0x000055ffcc49773c in zend_execute (op_array=0x7f3ed8c02000, return_value=0x0) at ./Zend/zend_vm_execute.h:60123
#31 0x000055ffcc429875 in zend_execute_scripts (type=type@entry=8, retval=retval@entry=0x0, file_count=file_count@entry=3) at ./Zend/zend.c:1792
#32 0x000055ffcc3c601f in php_execute_script (primary_file=<optimized out>) at ./main/main.c:2538
#33 0x000055ffcc26f335 in main (argc=<optimized out>, argv=<optimized out>) at ./sapi/fpm/fpm/fpm_main.c:1914

I suspect the errors are opcache-related; here is our opcache configuration:

[opcache]
opcache.memory_consumption=512
opcache.max_accelerated_files=1000000
opcache.revalidate_freq=0
opcache.revalidate_path=1
opcache.huge_code_pages=0
opcache.file_update_protection=30
opcache.jit=disable

We are running Debian 10 and PHP 8.1.6, up-to-date from packages.sury.org.

PHP Version

PHP 8.1.6 (cli) (built: May 17 2022 16:49:19) (NTS)

Operating System

Debian 10

[iluuu1994]

Hi @nono-gdv! Unfortunately it's very hard to understand this problem without more context. Assuming the code is closed source and can't be shared, you could try the following:

• Run zbacktrace in gdb to get a PHP backtrace
• Run frame 1 and then p (char *)persistent_script->script.filename->val to get the name of the compiled script

Maybe you can then share the given file if the problem can be isolated.

[nono-gdv]

Here you are.

The file is from Guzzle, this version: https://github.com/guzzle/guzzle/blob/7.4.3/src/Handler/HeaderProcessor.php

This is not consistent, however; segfaults sometimes happen in other files, even though Guzzle is a usual offender.

We are in the process of downgrading to PHP 8.0.19; it is a little early to tell for sure, but it looks like the segfaults are gone.

Reading symbols from /usr/sbin/php-fpm8.1...Reading symbols from /usr/lib/debug/.build-id/9a/0b98dd77386d65f38fe29707782edadbdc0057.debug...done.
done.
[New LWP 2329]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `php-fpm: pool www                                                          '.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f3ed8800556 in zend_accel_class_hash_copy (source=0x46736bb0, source=0x46736bb0, target=0x55ffcca9c330) at ./Zend/zend_types.h:1173
1173    ./Zend/zend_types.h: Aucun fichier ou dossier de ce type.
(gdb) zbacktrace
[0x7f3ed8c169f0] Composer\Autoload\includeFile("/space/www/kounga/data/releases/20220607140342/vendor/composer/../guzzlehttp/guzzle/src/Handler/HeaderProcessor.php") /space/www/kounga/data/releases/20220607140342/vendor/composer/ClassLoader.php:571 
[0x7f3ed8c16950] Composer\Autoload\ClassLoader->loadClass("GuzzleHttp\Handler\HeaderProcessor") /space/www/kounga/data/releases/20220607140342/vendor/composer/ClassLoader.php:428 
[0x7f3ed8c16880] GuzzleHttp\Handler\EasyHandle->createResponse() /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/Handler/EasyHandle.php:71 
[0x7f3ed8c167b0] GuzzleHttp\Handler\CurlFactory->GuzzleHttp\Handler\{closure}(object[0x7f3ed8c16800], "\15\12") /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php:571 
[0x7f3ed8c16750] curl_exec(object[0x7f3ed8c167a0]) [internal function]
[0x7f3ed8c166b0] GuzzleHttp\Handler\CurlHandler->__invoke(object[0x7f3ed8c16700], array(10)[0x7f3ed8c16710]) /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/Handler/CurlHandler.php:44 
[0x7f3ed8c16600] GuzzleHttp\Handler\Proxy->GuzzleHttp\Handler\{closure}(object[0x7f3ed8c16650], array(10)[0x7f3ed8c16660]) /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/Handler/Proxy.php:28 
[0x7f3ed8c16550] GuzzleHttp\Handler\Proxy->GuzzleHttp\Handler\{closure}(object[0x7f3ed8c165a0], array(10)[0x7f3ed8c165b0]) /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/Handler/Proxy.php:48 
[0x7f3ed8c16470] GuzzleHttp\PrepareBodyMiddleware->__invoke(object[0x7f3ed8c164c0], array(10)[0x7f3ed8c164d0]) /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/PrepareBodyMiddleware.php:35 
[0x7f3ed8c163c0] GuzzleHttp\Middleware->GuzzleHttp\{closure}(object[0x7f3ed8c16410], array(10)[0x7f3ed8c16420]) /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/Middleware.php:31 
[0x7f3ed8c16320] GuzzleHttp\RedirectMiddleware->__invoke(object[0x7f3ed8c16370], array(10)[0x7f3ed8c16380]) /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/RedirectMiddleware.php:71 
[0x7f3ed8c16280] GuzzleHttp\Middleware->GuzzleHttp\{closure}(object[0x7f3ed8c162d0], array(10)[0x7f3ed8c162e0]) /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/Middleware.php:63 
[0x7f3ed8c161f0] GuzzleHttp\HandlerStack->__invoke(object[0x7f3ed8c16240], array(10)[0x7f3ed8c16250]) /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/HandlerStack.php:75 
[0x7f3ed8c160a0] GuzzleHttp\Client->transfer(object[0x7f3ed8c160f0], reference) /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/Client.php:331 
[0x7f3ed8c15fc0] GuzzleHttp\Client->requestAsync("GET", object[0x7f3ed8c16020], array(11)[0x7f3ed8c16030]) /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/Client.php:168 
[0x7f3ed8c15f30] GuzzleHttp\Client->request("GET", "listing?boutique_id=18&langue_id=1&gammesId=31084%2C25476&nbImage=2&from=0&categoriesId=15333&tmp=1654610655199", array(1)[0x7f3ed8c15fa0]) /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/Client.php:187 
[0x7f3ed8c15eb0] GuzzleHttp\Client->get("listing?boutique_id=18&langue_id=1&gammesId=31084%2C25476&nbImage=2&from=0&categoriesId=15333&tmp=1654610655199") /space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/ClientTrait.php:44 
[0x7f3ed8c15dc0] App\Http\Controllers\Shopinvest\ProductController->listingDyn(object[0x7f3ed8c15e10]) /space/www/kounga/data/releases/20220607140342/app/Http/Controllers/Shopinvest/ProductController.php:1165 
[0x7f3ed8c15d40] Illuminate\Routing\Controller->callAction("listingDyn", array(1)[0x7f3ed8c15da0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54 
[0x7f3ed8c15ca0] Illuminate\Routing\ControllerDispatcher->dispatch(object[0x7f3ed8c15cf0], object[0x7f3ed8c15d00], "listingDyn") /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45 
[0x7f3ed8c15c40] Illuminate\Routing\Route->runController() /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Routing/Route.php:261 
[0x7f3ed8c15bc0] Illuminate\Routing\Route->run() /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Routing/Route.php:204 
[0x7f3ed8c15ac0] Illuminate\Routing\Router->Illuminate\Routing\{closure}(object[0x7f3ed8c15b10]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Routing/Router.php:725 
[0x7f3ed8c15a30] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c15a80]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:141 
[0x7f3ed8c15980] Illuminate\View\Middleware\ShareErrorsFromSession->handle(object[0x7f3ed8c159d0], object[0x7f3ed8c159e0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/View/Middleware/ShareErrorsFromSession.php:49 
[0x7f3ed8c158a0] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c158f0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180 
[0x7f3ed8c15800] Illuminate\Session\Middleware\StartSession->handleStatefulRequest(object[0x7f3ed8c15850], object[0x7f3ed8c15860], object[0x7f3ed8c15870]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php:121 
[0x7f3ed8c15740] Illuminate\Session\Middleware\StartSession->handle(object[0x7f3ed8c15790], object[0x7f3ed8c157a0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php:64 
[0x7f3ed8c15660] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c156b0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180 
[0x7f3ed8c155a0] App\Http\Middleware\Secure->handle(object[0x7f3ed8c155f0], object[0x7f3ed8c15600]) /space/www/kounga/data/releases/20220607140342/app/Http/Middleware/Secure.php:43 
[0x7f3ed8c154c0] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c15510]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180 
[0x7f3ed8c15440] Illuminate\Pipeline\Pipeline->then(object[0x7f3ed8c15490]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:116 
[0x7f3ed8c15390] Illuminate\Routing\Router->runRouteWithinStack(object[0x7f3ed8c153e0], object[0x7f3ed8c153f0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Routing/Router.php:726 
[0x7f3ed8c15290] Illuminate\Routing\Router->runRoute(object[0x7f3ed8c152e0], object[0x7f3ed8c152f0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Routing/Router.php:703 
[0x7f3ed8c15220] Illuminate\Routing\Router->dispatchToRoute(object[0x7f3ed8c15270]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Routing/Router.php:667 
[0x7f3ed8c151b0] Illuminate\Routing\Router->dispatch(object[0x7f3ed8c15200]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Routing/Router.php:656 
[0x7f3ed8c15130] Illuminate\Foundation\Http\Kernel->Illuminate\Foundation\Http\{closure}(object[0x7f3ed8c15180]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:167 
[0x7f3ed8c150a0] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c150f0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:141 
[0x7f3ed8c14fc0] App\Http\Middleware\SameOrigin->handle(object[0x7f3ed8c15010], object[0x7f3ed8c15020]) /space/www/kounga/data/releases/20220607140342/app/Http/Middleware/SameOrigin.php:11 
[0x7f3ed8c14ee0] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c14f30]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180 
[0x7f3ed8c14e30] App\Http\Middleware\Xss->handle(object[0x7f3ed8c14e80], object[0x7f3ed8c14e90]) /space/www/kounga/data/releases/20220607140342/app/Http/Middleware/Xss.php:37 
[0x7f3ed8c14d50] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c14da0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180 
[0x7f3ed8c14c90] App\Http\Middleware\Lang->handle(object[0x7f3ed8c14ce0], object[0x7f3ed8c14cf0]) /space/www/kounga/data/releases/20220607140342/app/Http/Middleware/Lang.php:24 
[0x7f3ed8c14bb0] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c14c00]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180 
[0x7f3ed8c14ae0] Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse->handle(object[0x7f3ed8c14b30], object[0x7f3ed8c14b40]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/AddQueuedCookiesToResponse.php:37 
[0x7f3ed8c14a00] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c14a50]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180 
[0x7f3ed8c148b0] Illuminate\Cookie\Middleware\EncryptCookies->handle(object[0x7f3ed8c14900], object[0x7f3ed8c14910]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/EncryptCookies.php:67 
[0x7f3ed8c147d0] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c14820]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180 
[0x7f3ed8c146f0] Illuminate\Foundation\Http\Middleware\PreventRequestsDuringMaintenance->handle(object[0x7f3ed8c14740], object[0x7f3ed8c14750]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/PreventRequestsDuringMaintenance.php:86 
[0x7f3ed8c14610] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c14660]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180 
[0x7f3ed8c14570] Illuminate\Http\Middleware\TrustProxies->handle(object[0x7f3ed8c145c0], object[0x7f3ed8c145d0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Http/Middleware/TrustProxies.php:39 
[0x7f3ed8c14490] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c144e0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180 
[0x7f3ed8c143d0] App\Http\Middleware\ControllerBinding->handle(object[0x7f3ed8c14420], object[0x7f3ed8c14430]) /space/www/kounga/data/releases/20220607140342/app/Http/Middleware/ControllerBinding.php:23 
[0x7f3ed8c142f0] Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(object[0x7f3ed8c14340]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:180 
[0x7f3ed8c14270] Illuminate\Pipeline\Pipeline->then(object[0x7f3ed8c142c0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:116 
[0x7f3ed8c141f0] Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter(object[0x7f3ed8c14240]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:142 
[0x7f3ed8c14150] Illuminate\Foundation\Http\Kernel->handle(object[0x7f3ed8c141a0]) /space/www/kounga/data/releases/20220607140342/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php:111 
[0x7f3ed8c14020] (main) /space/www/kounga/data/releases/20220607140342/public/index.php:52 
(gdb) frame 1
#1  zend_accel_load_script (persistent_script=persistent_script@entry=0x46736a80, from_shared_memory=from_shared_memory@entry=1) at ./ext/opcache/zend_accelerator_util_funcs.c:230
230     ./ext/opcache/zend_accelerator_util_funcs.c: Aucun fichier ou dossier de ce type.
(gdb) p (char *)persistent_script->script.filename->val
$1 = 0x4108a648 "/space/www/kounga/data/releases/20220607140342/vendor/guzzlehttp/guzzle/src/Handler/HeaderProcessor.php"

[nono-gdv]

I can confirm the segfaults are gone. Since last logrotate (about 5am, so 12h ago, give or take), we had 317 segfault with PHP 8.1, 300 of them in opcache.so. We downgraded to PHP 8.0 two hours ago, not a single segfault since.

[xPaw]

I had the same crash yesterday:

#0  0x00007fea1f24b8af in zend_accel_class_hash_copy (source=0x416548f0, target=0x5560d11e5370) at ./Zend/zend_types.h:1173
1173    ./Zend/zend_types.h: No such file or directory.
(gdb) bt
#0  0x00007fea1f24b8af in zend_accel_class_hash_copy (source=0x416548f0, target=0x5560d11e5370) at ./Zend/zend_types.h:1173
#1  zend_accel_load_script (persistent_script=0x416547c0, from_shared_memory=1) at ./ext/opcache/zend_accelerator_util_funcs.c:230
#2  0x00005560d0cf95b9 in compile_filename (type=type@entry=8, filename=filename@entry=0x7fea1f656280) at ./Zend/zend_language_scanner.c:707
#3  0x00005560d0d6936a in zend_include_or_eval (inc_filename_zv=<optimized out>, type=8) at ./Zend/zend_execute.c:4617
#4  0x00005560d0d766aa in ZEND_INCLUDE_OR_EVAL_SPEC_CV_HANDLER () at ./Zend/zend_vm_execute.h:38713
#5  0x00005560d0d9d396 in execute_ex (ex=0x41654a20) at ./Zend/zend_vm_execute.h:59122
#6  0x00005560d0d28e24 in zend_call_function (fci=<optimized out>, fci_cache=<optimized out>) at ./Zend/zend_execute_API.c:908
#7  0x00005560d0d29245 in zend_call_known_function (fn=0x7fea1f67c038, object=<optimized out>, called_scope=<optimized out>, retval_ptr=retval_ptr@entry=0x0, param_count=param_count@entry=1, params=params@entry=0x7fffc6eb4400, named_params=0x0) at ./Zend/zend_execute_API.c:997
#8  0x00005560d0c2e470 in spl_perform_autoload (class_name=0x40893108, lc_name=0x40893130) at ./ext/spl/php_spl.c:433
#9  0x00005560d0d280fc in zend_lookup_class_ex (name=name@entry=0x40893108, key=0x40893130, flags=flags@entry=512) at ./Zend/zend_execute_API.c:1141
#10 0x00005560d0d29592 in zend_fetch_class_by_name (class_name=0x40893108, key=<optimized out>, fetch_type=fetch_type@entry=512) at ./Zend/zend_execute_API.c:1601
#11 0x00005560d0d74187 in ZEND_INIT_STATIC_METHOD_CALL_SPEC_CONST_CONST_HANDLER () at ./Zend/zend_vm_execute.h:6778
#12 0x00005560d0d9c1ed in execute_ex (ex=0x41654a20) at ./Zend/zend_vm_execute.h:56351
#13 0x00005560d0da513d in zend_execute (op_array=0x7fea1f67b000, return_value=0x0) at ./Zend/zend_vm_execute.h:60123
#14 0x00005560d0d3761d in zend_execute_scripts (type=type@entry=8, retval=retval@entry=0x0, file_count=file_count@entry=3) at ./Zend/zend.c:1790
#15 0x00005560d0cd30c1 in php_execute_script (primary_file=primary_file@entry=0x7fffc6eb6b50) at ./main/main.c:2538
#16 0x00005560d0b8086d in main (argc=<optimized out>, argv=<optimized out>) at ./sapi/fpm/fpm/fpm_main.c:1914

It seems to be related to autoload, as OP's trace also has spl_perform_autoload.

The zbacktrace basically boils down to the require call after file_exists inside of spl_autoload_register callback. The string (path) looks okay to me in the trace.

[brainexe]

we also have the same random segfault with 8.1.7...also quite rare but overall having many failing processed per day. PHP8.0 downgrade is no option and we tried already different opcache config changes (optimizatzion level, disable jit) without success.

[jirkace]

@brainexe what about 8.1.8, did you try it? Did you try opcache.jit=1205?

[brainexe]

jit is disabled and php8.1.8 will be used next week on prod, then we will see 🤞