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snmp SEGV #17330

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YuanchengJiang opened this issue Jan 3, 2025 · 1 comment · May be fixed by #17332
Closed

snmp SEGV #17330

YuanchengJiang opened this issue Jan 3, 2025 · 1 comment · May be fixed by #17332
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@devnexen
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Bug Extension: snmp Status: Verified

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@YuanchengJiang
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Description

The following code:

<?php
$session = new SNMP(SNMP::VERSION_2c, $hostname, 'timeout_community_432', $timeout, $retries);
$session->close();
$session->setSecurity('authPriv', 'MD5', $auth_pass, 'AES', $priv_pass);

Resulted in this output:

/home/phpfuzz/WorkSpace/flowfusion/php-src/ext/snmp/snmp.c:952:6: runtime error: member access within null pointer of type 'struct snmp_session'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/phpfuzz/WorkSpace/flowfusion/php-src/ext/snmp/snmp.c:952:6

PHP Version

nightly

Operating System

No response
@devnexen devnexen self-assigned this Jan 3, 2025
@devnexen
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devnexen commented Jan 3, 2025 •
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I ll have a look later today. Making a fetch object check for accessors seems appropriate.

@evrenonur evrenonur mentioned this issue Jan 3, 2025
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devnexen added a commit to devnexen/php-src that referenced this issue Jan 3, 2025
@devnexen
Fix phpGH-17330: SNMP::setSecurity segfaults when object had been clo…
66e090a 
…sed.

having new macro when the workflow needs to deal with an existing SNMP session.
@devnexen devnexen linked a pull request Jan 3, 2025 that will close this issue
Fix GH-17330: SNMP::setSecurity segfaults when object had been closed. #17337
Closed
devnexen added a commit to devnexen/php-src that referenced this issue Jan 5, 2025
@devnexen
Fix phpGH-17330: SNMP::setSecurity segfaults when object had been clo…
ca8a497 
…sed.

checking when the workflow needs to deal with an existing SNMP session.
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@devnexen devnexen

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Bug Extension: snmp Status: Verified
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@devnexen @YuanchengJiang