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MINOR: ring: always check that the old ring fits in the new one in ring_dup()

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Let's add a BUG_ON() to make sure we don't accidentally shrink a buffer.
This commit is contained in:
Willy Tarreau 2024-04-15 08:31:01 +02:00
parent 3ef7daa731
commit 4615cb510c
1 changed files with 2 additions and 0 deletions
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include/haproxy/ring.h
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@ -102,6 +102,8 @@ static inline size_t ring_dup(struct ring *dst, const struct ring *src, size_t m
if (max > ring_data(src)) if (max > ring_data(src))
max = ring_data(src); max = ring_data(src);
BUG_ON(max > ring_size(dst));
vp_peek_ofs(v1, v2, 0, ring_area(dst), max); vp_peek_ofs(v1, v2, 0, ring_area(dst), max);
dst->storage->head = 0; dst->storage->head = 0;
dst->storage->tail = max; dst->storage->tail = max;