systemd/coccinelle/strdupa.cocci
Lennart Poettering 2f82562bad alloc-util: add strdupa_safe() + strndupa_safe() and use it everywhere
Let's define two helpers strdupa_safe() + strndupa_safe() which do the
same as their non-safe counterparts, except that they abort if called
with allocations larger than ALLOCA_MAX.

This should ensure that all our alloca() based allocations are subject
to this limit.

afaics glibc offers three alloca() based APIs: alloca() itself,
strndupa() + strdupa(). With this we have now replacements for all of
them, that take the limit into account.
2021-10-14 15:57:52 +02:00

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
@@
expression x;
@@
- strdupa(x)
+ strdupa_safe(x)
@@
expression x, n;
@@
- strndupa(x, n)
+ strndupa_safe(x, n)