43 lines
1.1 KiB
Diff
43 lines
1.1 KiB
Diff
From 9d1bed5eccdbb46a26b8a484f5e9163c40e63919 Mon Sep 17 00:00:00 2001
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From: Christian Brabandt <cb@256bit.org>
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Date: Mon, 20 Jan 2025 22:55:57 +0100
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Subject: [PATCH] patch 9.1.1043: [security]: segfault in win_line()
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Problem: [security]: segfault in win_line()
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(fizz-is-on-the-way)
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Solution: Check that ScreenLines is not NULL
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Github Advisory:
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https://github.com/vim/vim/security/advisories/GHSA-j3g9-wg22-v955
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Signed-off-by: Christian Brabandt <cb@256bit.org>
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---
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src/gui.c | 6 ++++--
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1 file changed, 4 insertions(+), 2 deletions(-)
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diff --git a/src/gui.c b/src/gui.c
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index 8e7b079a5a4ea4..86c40de632aa1e 100644
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--- a/src/gui.c
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+++ b/src/gui.c
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@@ -4471,13 +4471,15 @@ gui_do_scroll(void)
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/*
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* Don't call updateWindow() when nothing has changed (it will overwrite
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* the status line!).
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+ *
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+ * Check for ScreenLines, because in ex-mode, we don't have a valid display.
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*/
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- if (old_topline != wp->w_topline
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+ if (ScreenLines != NULL && (old_topline != wp->w_topline
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|| wp->w_redr_type != 0
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#ifdef FEAT_DIFF
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|| old_topfill != wp->w_topfill
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#endif
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- )
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+ ))
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{
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int type = UPD_VALID;
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--
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2.43.0
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