Fix crash in php_openssl_pkey_init_ec() when EVP_PKEY_CTX_new() fails#21013
Closed
ndossche wants to merge 1 commit intophp:PHP-8.4from
Closed
Fix crash in php_openssl_pkey_init_ec() when EVP_PKEY_CTX_new() fails#21013ndossche wants to merge 1 commit intophp:PHP-8.4from
ndossche wants to merge 1 commit intophp:PHP-8.4from
Conversation
Other locations of EVP_PKEY_CTX_new() pass the pointer into a function
that can handle NULL pointer inputs; OR they check for a NULL pointer.
EVP_PKEY_check() apparently cannot handle a NULL pointer argument:
```
==3749==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000088 (pc 0x7f6f4550c0fb bp 0x7ffcbff3a9c0 sp 0x7ffcbff3a9b0 T0)
==3749==The signal is caused by a READ memory access.
==3749==Hint: address points to the zero page.
#0 0x7f6f4550c0fb in EVP_PKEY_pairwise_check (/lib/x86_64-linux-gnu/libcrypto.so.3+0x20f0fb) (BuildId: 0698e1ff610cb3c6993dccbd82c1281b1b4c5ade)
#1 0x561499d27117 in php_openssl_pkey_init_ec /work/php-src/ext/openssl/openssl_backend_v3.c:459
#2 0x561499cfe328 in zif_openssl_pkey_new /work/php-src/ext/openssl/openssl.c:2061
#3 0x56149aab7ed2 in zend_test_execute_internal /work/php-src/ext/zend_test/observer.c:306
#4 0x56149ade024a in ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER /work/php-src/Zend/zend_vm_execute.h:2154
#5 0x56149af40995 in execute_ex /work/php-src/Zend/zend_vm_execute.h:116519
#6 0x56149af558b0 in zend_execute /work/php-src/Zend/zend_vm_execute.h:121962
#7 0x56149b0ba0ab in zend_execute_script /work/php-src/Zend/zend.c:1980
#8 0x56149aaec8bb in php_execute_script_ex /work/php-src/main/main.c:2645
#9 0x56149aaecccb in php_execute_script /work/php-src/main/main.c:2685
#10 0x56149b0bfc16 in do_cli /work/php-src/sapi/cli/php_cli.c:951
#11 0x56149b0c21e3 in main /work/php-src/sapi/cli/php_cli.c:1362
#12 0x7f6f44f7f1c9 (/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9) (BuildId: 274eec488d230825a136fa9c4d85370fed7a0a5e)
#13 0x7f6f44f7f28a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28a) (BuildId: 274eec488d230825a136fa9c4d85370fed7a0a5e)
#14 0x561499c09b34 in _start (/work/php-src/build-dbg-asan/sapi/cli/php+0x609b34) (BuildId: eb0a8e6b6d683fbdf45156dfed4d76f9110252b9)
```
bukka
approved these changes
Apr 3, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Other locations of EVP_PKEY_CTX_new() pass the pointer into a function that can handle NULL pointer inputs; OR they check for a NULL pointer. EVP_PKEY_check() apparently cannot handle a NULL pointer argument:
This was found by a hybrid static-dynamic analyser that looks for inconsistent handling of error checks in bindings.