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48 lines
1.6 KiB
48 lines
1.6 KiB
commit a1110e24e5be53ba5fe9ab82372c02a60da06cf9
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Author: Emeric Brun <ebrun@haproxy.com>
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Date: Tue Jul 17 09:47:07 2018 -0400
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BUG/MINOR: map: fix map_regm with backref
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Due to a cascade of get_trash_chunk calls the sample is
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corrupted when we want to read it.
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The fix consist to use a temporary chunk to copy the sample
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value and use it.
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(cherry picked from commit 271022150d7961b9aa39dbfd88e0c6a4bc48c3ee)
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Signed-off-by: Willy Tarreau <w@1wt.eu>
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diff --git a/src/map.c b/src/map.c
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index a9a1e53c..da399088 100644
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--- a/src/map.c
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+++ b/src/map.c
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@@ -184,10 +184,27 @@ static int sample_conv_map(const struct arg *arg_p, struct sample *smp, void *pr
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if (pat->data) {
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/* In the regm case, merge the sample with the input. */
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if ((long)private == PAT_MATCH_REGM) {
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+ struct chunk *tmptrash;
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+
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+ /* Copy the content of the sample because it could
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+ be scratched by incoming get_trash_chunk */
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+ tmptrash = alloc_trash_chunk();
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+ if (!tmptrash)
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+ return 0;
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+
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+ tmptrash->len = smp->data.u.str.len;
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+ if (tmptrash->len > (tmptrash->size-1))
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+ tmptrash->len = tmptrash->size-1;
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+
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+ memcpy(tmptrash->str, smp->data.u.str.str, tmptrash->len);
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+ tmptrash->str[tmptrash->len] = 0;
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+
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str = get_trash_chunk();
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- str->len = exp_replace(str->str, str->size, smp->data.u.str.str,
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+ str->len = exp_replace(str->str, str->size, tmptrash->str,
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pat->data->u.str.str,
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(regmatch_t *)smp->ctx.a[0]);
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+
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+ free_trash_chunk(tmptrash);
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if (str->len == -1)
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return 0;
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smp->data.u.str = *str;
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