Re: Apache segmentation fault when loading libphp7.so

Am 13.08.2020 um 15:28 schrieb Christoph M. Becker: > On 13.08.2020 at 14:47, Kai Fürstenberg wrote: > >> Am 13.08.2020 um 14:34 schrieb Christoph M. Becker: >> >>> On 13.08.2020 at 13:47, Kai Fürstenberg wrote: >>> >>>> Am 13.08.2020 um 12:53 schrieb Christoph M. Becker: >>>> >>>>> On 13.08.2020 at 11:52, Kai Fürstenberg wrote: >>>>> >>>>>> Am 13.08.2020 um 10:31 schrieb Christoph M. Becker: >>>>>> >>>>>>> On 12.08.2020 at 18:09, Kai Fürstenberg wrote: >>>>>>> >>>>>>>> Hello everybody, >>>>>>>> >>>>>>>> and thank you for you help so far. >>>>>>>> >>>>>>>> I played around with gdb a little bit. >>>>>>>> >>>>>>>> I re-configured php the way I did in 7.2 (just with some slight >>>>>>>> modifications), to use mysql, gd and some other things. >>>>>>>> >>>>>>>> But this time, httpd stops with >>>>>>>> >>>>>>>> Program received signal SIGSEGV, Segmentation fault. >>>>>>>> resolve_stripslashes () at >>>>>>>> /usr/src/apache_testing/php-7.4.9/Zend/zend_cpuinfo.h:157 >>>>>>>> 157             __builtin_cpu_init(); >>>>>>>> >>>>>>>> Before I had the fault >>>>>>>> >>>>>>>> #0  resolve_base64_decode () at >>>>>>>> /usr/src/apache_testing/php-7.4.9/Zend/zend_cpuinfo.h:141 >>>>>>>> >>>>>>>> Line 141 of zend_cpuinfo.h is the very same command >>>>>>>> __builtin_cpu_init() >>>>>>>> >>>>>>>> It seems, that exactly this command __builtin_cpu_init() fails for >>>>>>>> some >>>>>>>> reason... >>>>>>> >>>>>>> Did you check config.log? There is a test for __builtin_cpu_init() >>>>>>> availability[1] which apparently succeeds on your system, but it's >>>>>>> worth >>>>>>> to actually look that up in config.log. Maybe this test should use >>>>>>> AC_RUN_IFELSE instead of AC_LINK_IFELSE (and have the then and else >>>>>>> branch of the ternary operator swapped)? >>>>>>> >>>>>>> [1] >>>>>>> >>>>>>> <https://github.com/php/php-src/blob/php-7.3.21/acinclude.m4#L3261-L3278��� >>>>>>> ����4�\&W�> >>>>>> >>>>>> config.log: >>>>>> configure:13702: checking for __builtin_cpu_init >>>>>> configure:13718: cc -o conftest -g -O2 -fvisibility=hidden -pthread >>>>>> -D_REENTRANT conftest.c -lm -ldl -lpthread >&5 >>>>>> configure:13718: $? = 0 >>>>>> configure:13721: result: yes >>>>>> configure:13741: checking for __builtin_cpu_supports >>>>>> configure:13757: cc -o conftest -g -O2 -fvisibility=hidden -pthread >>>>>> -D_REENTRANT conftest.c -lm -ldl -lpthread >&5 >>>>>> configure:13757: $? = 0 >>>>>> configure:13760: result: yes >>>>>> >>>>>> I just don't understand what you mean with the link... >>>>> >>>>> I basically suggested to apply >>>>> >>>>> <https://gist.github.com/cmb69/3fd0106ce78446c9e10e54eec21a4d82>, >>>>> and to >>>>> run ./configure again. Would the result still be "yes"? >>>> >>>> OK, so far so good. >>>> >>>> I just wonder, which file you want me to patch, because my acinclude.m4 >>>> (in Zend subfolder, v7.3) only has about 200 lines (the mentioned part >>>> is missing in this file) and in 7.4 this file is completely missing... >>> >>> The patch is about acinclude.m4 in the toplevel folder: >>> >>> <https://github.com/php/php-src/blob/php-7.3.21/acinclude.m4>. >> >> This file is not available in 7.4. In 7.3 it's there, but not 7.4. >> I can try 7.3 with your patch. Just gimme some time and see if this works. > > For PHP 7.4, the relevant code has been moved to build/php.m4, where you > could apply the patch manually. found it, patched it, no success :-( gdb sais during start: (gdb) run -X -e debug -k start Starting program: /usr/local/httpd-test/bin/httpd -X -e debug -k start [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1". [Thu Aug 13 16:37:33.167001 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module authn_file_module from /usr/local/httpd-test/modules/mod_authn_file.so [Thu Aug 13 16:37:33.172838 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module authn_core_module from /usr/local/httpd-test/modules/mod_authn_core.so [Thu Aug 13 16:37:33.180461 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module authz_host_module from /usr/local/httpd-test/modules/mod_authz_host.so [Thu Aug 13 16:37:33.188699 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module authz_groupfile_module from /usr/local/httpd-test/modules/mod_authz_groupfile.so [Thu Aug 13 16:37:33.192880 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module authz_user_module from /usr/local/httpd-test/modules/mod_authz_user.so [Thu Aug 13 16:37:33.198609 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module authz_core_module from /usr/local/httpd-test/modules/mod_authz_core.so [Thu Aug 13 16:37:33.203728 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module access_compat_module from /usr/local/httpd-test/modules/mod_access_compat.so [Thu Aug 13 16:37:33.209049 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module auth_basic_module from /usr/local/httpd-test/modules/mod_auth_basic.so [Thu Aug 13 16:37:33.214484 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module reqtimeout_module from /usr/local/httpd-test/modules/mod_reqtimeout.so [Thu Aug 13 16:37:33.219988 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module filter_module from /usr/local/httpd-test/modules/mod_filter.so [Thu Aug 13 16:37:33.225700 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module mime_module from /usr/local/httpd-test/modules/mod_mime.so [Thu Aug 13 16:37:33.233384 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module log_config_module from /usr/local/httpd-test/modules/mod_log_config.so [Thu Aug 13 16:37:33.238389 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module env_module from /usr/local/httpd-test/modules/mod_env.so [Thu Aug 13 16:37:33.244778 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module headers_module from /usr/local/httpd-test/modules/mod_headers.so [Thu Aug 13 16:37:33.250135 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module setenvif_module from /usr/local/httpd-test/modules/mod_setenvif.so [Thu Aug 13 16:37:33.254650 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module version_module from /usr/local/httpd-test/modules/mod_version.so [Thu Aug 13 16:37:33.259923 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module unixd_module from /usr/local/httpd-test/modules/mod_unixd.so [Thu Aug 13 16:37:33.266106 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module status_module from /usr/local/httpd-test/modules/mod_status.so [Thu Aug 13 16:37:33.272127 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module autoindex_module from /usr/local/httpd-test/modules/mod_autoindex.so [Thu Aug 13 16:37:33.276585 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module dir_module from /usr/local/httpd-test/modules/mod_dir.so [Thu Aug 13 16:37:33.282635 2020] [so:debug] [pid 25320:tid 3083007424] mod_so.c(266): AH01575: loaded module alias_module from /usr/local/httpd-test/modules/mod_alias.so Program received signal SIGSEGV, Segmentation fault. resolve_stripslashes () at /usr/src/apache_testing/php-7.4.9/Zend/zend_cpuinfo.h:157 157 __builtin_cpu_init(); (gdb) bt #0 resolve_stripslashes () at /usr/src/apache_testing/php-7.4.9/Zend/zend_cpuinfo.h:157 #1 0xb7fe2aa2 in elf_machine_rel (skip_ifunc=<optimized out>, reloc_addr_arg=<optimized out>, version=<optimized out>, sym=<optimized out>, reloc=0xb6eabe48, map=0x4eaa40) at ../sysdeps/i386/dl-machine.h:353 #2 elf_dynamic_do_Rel (skip_ifunc=<optimized out>, lazy=<optimized out>, nrelative=<optimized out>, relsize=<optimized out>, reladdr=<optimized out>, map=<optimized out>) at do-rel.h:137 #3 _dl_relocate_object (scope=<optimized out>, reloc_mode=<optimized out>, consider_profiling=<optimized out>) at dl-reloc.c:258 #4 0xb7fe9efa in dl_open_worker (a=<optimized out>) at dl-open.c:377 #5 0xb7da0a9c in __GI__dl_catch_exception (exception=<optimized out>, operate=<optimized out>, args=<optimized out>) at dl-error-skeleton.c:196 #6 0xb7fe98fe in _dl_open (file=0x4db670 "/usr/local/httpd-test/modules/libphp7.so", mode=-2147483390, caller_dlopen=0xb7ec6934 <apr_dso_load+36>, nsid=<optimized out>, argc=6, argv=0xbffffc14, env=0xbffffc30) at dl-open.c:599 #7 0xb7e4a2c8 in dlopen_doit (a=0xbffff4dc) at dlopen.c:66 #8 0xb7da0a9c in __GI__dl_catch_exception (exception=<optimized out>, operate=<optimized out>, args=<optimized out>) at dl-error-skeleton.c:196 #9 0xb7da0b40 in __GI__dl_catch_error (objname=0x4df47c, errstring=0x4df480, mallocedp=0x4df478, operate=0xb7e4a250 <dlopen_doit>, args=0xbffff4dc) at dl-error-skeleton.c:215 #10 0xb7e4aa71 in _dlerror_run (operate=0xb7e4a250 <dlopen_doit>, args=0xbffff4dc) at dlerror.c:163 #11 0xb7e4a366 in __dlopen (file=0x4db670 "/usr/local/httpd-test/modules/libphp7.so", mode=258) at dlopen.c:87 #12 0xb7ec6934 in apr_dso_load (res_handle=0xbffff694, path=0x4db670 "/usr/local/httpd-test/modules/libphp7.so", pool=0x4b0218) at dso/unix/dso.c:139 #13 0x0045d295 in dso_load (cmd=cmd@entry=0xbffff9fc, modhandlep=modhandlep@entry=0xbffff694, filename=filename@entry=0x4e8a18 "modules/libphp7.so", used_filename=0xbffff69c) at mod_so.c:162 #14 0x0045d53a in load_module (cmd=0xbffff9fc, dummy=0xbffff93c, modname=0x4e8a08 "php7_module", filename=0x4e8a18 "modules/libphp7.so") at mod_so.c:263 #15 0x00449ff2 in invoke_cmd (cmd=<optimized out>, parms=parms@entry=0xbffff9fc, mconfig=mconfig@entry=0xbffff93c, args=<optimized out>) at config.c:895 #16 0x0044ac98 in execute_now (p=0xbffff984, ptemp=0xbffff988, parent=<optimized out>, sub_tree=<optimized out>, parms=<optimized out>, args=0x4dad03 "php7_module modules/libphp7.so", cmd_line=<optimized out>) at config.c:1707 #17 ap_build_config_sub (p=p@entry=0x4b0218, temp_pool=temp_pool@entry=0x4dabe8, l=<optimized out>, parms=<optimized out>, current=<optimized out>, curr_parent=<optimized out>, conftree=<optimized out>) at config.c:1171 #18 0x0044cba2 in ap_build_config (parms=0xbffff9fc, p=0x4b0218, temp_pool=0x4dabe8, conftree=0x4a6628 <ap_conftree>) at config.c:1428 #19 0x0044d342 in ap_process_resource_config (s=0x4d7930, fname=0x4dd990 "/usr/local/httpd-test/conf/httpd.conf", conftree=0x4a6628 <ap_conftree>, p=<optimized out>, ptemp=0x4dabe8) at config.c:1877 #20 0x0044e135 in ap_read_config (process=<optimized out>, ptemp=<optimized out>, filename=<optimized out>, conftree=<optimized out>) at config.c:2339 #21 0x00425c33 in main (argc=<optimized out>, argv=<optimized out>) at main.c:659 Kai