Aurelien DARRAGON d4dba38ab1 BUG/MINOR: errors: handle malloc failure in usermsgs_put() ...

usermsgs_buf.size is set without first checking if previous malloc
attempt succeeded.

This could fool the buffer API into assuming that the buffer is
initialized, resulting in unsafe read/writes.

Guarding usermsgs_buf.size assignment with the malloc attempt result
to make the buffer initialization safe against malloc failures.

This partially fixes GH #2130.

It should be backported up to 2.6.

2023-05-12 09:45:30 +02:00

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