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From 806d037671e133bd28a7864248763f643967973a Mon Sep 17 00:00:00 2001
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From: Bram Moolenaar <Bram@vim.org>
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Date: Tue, 25 Jan 2022 20:45:16 +0000
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Subject: [PATCH] patch 8.2.4218: illegal memory access with bracketed paste in
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Ex mode
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Problem: Illegal memory access with bracketed paste in Ex mode.
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Solution: Reserve space for the trailing NUL.
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---
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src/edit.c | 3 ++-
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src/testdir/test_paste.vim | 3 +++
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src/version.c | 2 ++
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3 files changed, 7 insertions(+), 1 deletion(-)
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diff --git a/src/edit.c b/src/edit.c
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index ee3caf0da..2b5301100 100644
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--- a/src/edit.c
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+++ b/src/edit.c
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@@ -4452,7 +4452,8 @@ bracketed_paste(paste_mode_T mode, int drop, garray_T *gap)
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break;
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case PASTE_EX:
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- if (gap != NULL && ga_grow(gap, idx) == OK)
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+ // add one for the NUL that is going to be appended
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+ if (gap != NULL && ga_grow(gap, idx + 1) == OK)
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{
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mch_memmove((char *)gap->ga_data + gap->ga_len,
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buf, (size_t)idx);
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diff --git a/src/testdir/test_paste.vim b/src/testdir/test_paste.vim
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index c94fe7c35..5b8d8a0e3 100644
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--- a/src/testdir/test_paste.vim
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+++ b/src/testdir/test_paste.vim
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@@ -90,6 +90,9 @@ func Test_paste_ex_mode()
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unlet! foo
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call feedkeys("Qlet foo=\"\<Esc>[200~foo\<CR>bar\<Esc>[201~\"\<CR>vi\<CR>", 'xt')
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call assert_equal("foo\rbar", foo)
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+
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+ " pasting more than 40 bytes
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+ exe "norm Q\<PasteStart>0000000000000000000000000000000000000000000000000000000000000000000000\<C-C>"
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endfunc
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func Test_paste_onechar()
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--
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2.34.1
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