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core/ringbuffer: compensate 'ringbuffer_remove' underflow error

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When rb->start = rb->size, `ringbuffer_get_one(ringbuffer_t *restrict rb)`
will read out of bounds.
This commit is contained in:
mjc 2020-01-06 14:41:12 +08:00 committed by Francisco Molina
parent 0d4d621f99
commit 7f44c02f45
1 changed files with 1 additions and 1 deletions
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2
core/ringbuffer.c
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@ -121,7 +121,7 @@ unsigned ringbuffer_remove(ringbuffer_t *restrict rb, unsigned n)
rb->avail -= n; rb->avail -= n;
/* compensate underflow */ /* compensate underflow */
if (rb->start > rb->size) { if (rb->start >= rb->size) {
rb->start -= rb->size; rb->start -= rb->size;
} }
} }