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st: guard tsetdirt() against zero-sized terminal

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tsetdirt() assumes term.row > 0. During early init or
resize paths this may not hold, leading to out-of-bounds
access. Bail out early if there are no rows.
This commit is contained in:
Milos Nikic 2026-01-14 21:00:32 -08:00 • committed by Hiltjo Posthuma
commit 688f70add0
1 changed files with 3 additions and 0 deletions
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st.c
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@ -965,6 +965,9 @@ tsetdirt(int top, int bot)
{ {
int i; int i;
if (term.row <= 0)
return;
LIMIT(top, 0, term.row-1); LIMIT(top, 0, term.row-1);
LIMIT(bot, 0, term.row-1); LIMIT(bot, 0, term.row-1);