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libpfctl: be more tolerant of kernel extensions

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Allow the kernel to supply more array elements than expected, but cut
off when we hit what we think the maximum is. This will improve forward
compatibility (i.e. old userspace with newer kernel).

Reviewed by:	zlei
MFC after:	1 week
Sponsored by:	Orange Business Services
Differential Revision:	https://reviews.freebsd.org/D42392
This commit is contained in:
Kristof Provost 2023-10-27 14:13:57 +02:00
parent 483d5c4075
commit 2b1eb63fc9
1 changed files with 1 additions and 2 deletions
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3
lib/libpfctl/libpfctl.c
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@ -152,9 +152,8 @@ pf_nvuint_32_array(const nvlist_t *nvl, const char *name, size_t maxelems,
size_t elems;
tmp = nvlist_get_number_array(nvl, name, &elems);
assert(elems <= maxelems);
for (size_t i = 0; i < elems; i++)
for (size_t i = 0; i < elems && i < maxelems; i++)
numbers[i] = tmp[i];
if (nelems)