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fdr: ensure 16 bytes of pre-history in block mode

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Justin Viiret 2016-05-10 09:32:13 +10:00 committed by Matthew Barr
parent 97eaea043e
commit 95f35aad0e
1 changed files with 6 additions and 2 deletions
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8
src/fdr/fdr.c
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@ -800,12 +800,16 @@ static const u8 fake_history[FAKE_HISTORY_SIZE];
hwlm_error_t fdrExec(const struct FDR *fdr, const u8 *buf, size_t len, hwlm_error_t fdrExec(const struct FDR *fdr, const u8 *buf, size_t len,
size_t start, HWLMCallback cb, void *ctxt, size_t start, HWLMCallback cb, void *ctxt,
hwlm_group_t groups) { hwlm_group_t groups) {
// We guarantee (for safezone construction) that it is safe to read 16
// bytes before the end of the history buffer.
const u8 *hbuf = fake_history + FAKE_HISTORY_SIZE;
const struct FDR_Runtime_Args a = { const struct FDR_Runtime_Args a = {
buf, buf,
len, len,
fake_history, hbuf,
0, 0,
fake_history, // nocase hbuf, // nocase
0, 0,
start, start,
cb, cb,