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slackline: fix reallocation memory issue - lchat - A line oriented chat front e… |
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git clone git://git.suckless.org/lchat |
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commit d671b2273e2283df46dd940dc7ce6a1a3476f9eb |
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parent dbc8751dc6c034967d2b3133a58a627834992e8c |
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Author: Petr Vaněk <[email protected]> |
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Date: Mon, 26 Sep 2022 16:27:12 +0200 |
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slackline: fix reallocation memory issue |
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It is necessary to update sl->ptr and sl->last pointers appropriately |
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after reallocation otherwise backspacing or deleting can work in wrong |
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memory area. |
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Diffstat: |
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M slackline.c | 2 ++ |
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1 file changed, 2 insertions(+), 0 deletions(-) |
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--- |
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diff --git a/slackline.c b/slackline.c |
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@@ -239,6 +239,8 @@ compose: |
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if ((nbuf = realloc(sl->buf, sl->bufsize * 2)) == NULL) |
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return -1; |
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+ sl->ptr = nbuf + (sl->ptr - sl->buf); |
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+ sl->last = nbuf + (sl->last - sl->buf); |
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sl->buf = nbuf; |
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sl->bufsize *= 2; |
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} |
