Comments (1)
I assume that the issue is somewhere in insert_prefix
, but the code was inlined and we cannot pin point which line is problematic based on this.
The issue is likely to be here:
behavioral-model/src/bf_lpm_trie/bf_lpm_trie.c
Lines 207 to 210 in 9979ce2
I believe it is possible for a
to be equal to prefixes->size - 1
at that point, which means the new element needs to be inserted at the very end of the array, but the array does not need to be grown.
In this case, we try to move the contents of prefixes->prefixes[a]
to prefixes->prefixes[a+1]
, which is outside of the allocated array, and that could be the issue.
It may be that this calculation is off-by-one: size_t size = (prefixes->size - a) * sizeof(*prefixes->prefixes);
If someone fixes it, it would be great to add a unit test to https://github.com/p4lang/behavioral-model/blob/main/tests/test_tables.cpp which triggers this behavior.
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