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Fix NULL arithmetic in System V shared memory emulation #17550

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@cmb69 cmb69 commented Jan 23, 2025

For the first child process execution, TWG(shm) is NULL; we need to catch that to avoid undefined behavior.


Basically the same issue as #17470. It might be a good idea to set up a Windows nightly with Clang sanitizers enabled.

For the first child process execution, `TWG(shm)` is `NULL`; we need to
catch that to avoid undefined behavior.
@cmb69 cmb69 marked this pull request as ready for review January 23, 2025 16:35
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@Girgias Girgias left a comment

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MSTM

@cmb69 cmb69 closed this in 2e02cdf Jan 25, 2025
@cmb69 cmb69 deleted the cmb/shm_get-null branch January 25, 2025 18:00
charmitro pushed a commit to wasix-org/php that referenced this pull request Mar 13, 2025
For the first child process execution, `TWG(shm)` is `NULL`; we need to
catch that to avoid undefined behavior.

Closes phpGH-17550.
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3 participants