33 lines
1.1 KiB
Diff
33 lines
1.1 KiB
Diff
From 25aabc2b8ee1e19ced6f4da9d866cf9378fc4c5a Mon Sep 17 00:00:00 2001
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From: Christian Brabandt <cb@256bit.org>
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Date: Tue, 14 Nov 2023 19:31:34 +0100
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Subject: [PATCH] patch 9.0.2106: [security]: Use-after-free in win_close()
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Problem: [security]: Use-after-free in win_close()
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Solution: Check window is valid, before accessing it
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If the current window structure is no longer valid (because a previous
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autocommand has already freed this window), fail and return before
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attempting to set win->w_closing variable.
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Add a test to trigger ASAN in CI
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Signed-off-by: Christian Brabandt <cb@256bit.org>
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---
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src/window.c | 2 ++
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1 files changed, 2 insertions(+)
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diff --git a/src/window.c b/src/window.c
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index f77ede330d304..55ce31c886437 100644
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--- a/src/window.c
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+++ b/src/window.c
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@@ -2682,6 +2682,8 @@ win_close(win_T *win, int free_buf)
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reset_VIsual_and_resel(); // stop Visual mode
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other_buffer = TRUE;
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+ if (!win_valid(win))
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+ return FAIL;
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win->w_closing = TRUE;
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apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf);
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if (!win_valid(win))
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