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diff -up vim82/src/regexp.c.cve4192 vim82/src/regexp.c
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--- vim82/src/regexp.c.cve4192 2021-03-22 10:02:42.000000000 +0100
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+++ vim82/src/regexp.c 2022-01-13 10:54:17.629176807 +0100
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@@ -1316,9 +1316,9 @@ reg_match_visual(void)
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if (lnum < top.lnum || lnum > bot.lnum)
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return FALSE;
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+ col = (colnr_T)(rex.input - rex.line);
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if (mode == 'v')
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{
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- col = (colnr_T)(rex.input - rex.line);
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if ((lnum == top.lnum && col < top.col)
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|| (lnum == bot.lnum && col >= bot.col + (*p_sel != 'e')))
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return FALSE;
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@@ -1333,7 +1333,12 @@ reg_match_visual(void)
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end = end2;
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if (top.col == MAXCOL || bot.col == MAXCOL)
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end = MAXCOL;
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- cols = win_linetabsize(wp, rex.line, (colnr_T)(rex.input - rex.line));
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+
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+ // getvvcol() flushes rex.line, need to get it again
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+ rex.line = reg_getline(rex.lnum);
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+ rex.input = rex.line + col;
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+
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+ cols = win_linetabsize(wp, rex.line, col);
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if (cols < start || cols > end - (*p_sel == 'e'))
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return FALSE;
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}
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diff -up vim82/src/testdir/test_regexp_latin.vim.cve4192 vim82/src/testdir/test_regexp_latin.vim
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--- vim82/src/testdir/test_regexp_latin.vim.cve4192 2022-01-13 10:52:05.508789448 +0100
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+++ vim82/src/testdir/test_regexp_latin.vim 2022-01-13 10:52:05.510789454 +0100
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@@ -946,4 +946,12 @@ func Test_using_invalid_visual_position(
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bwipe!
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endfunc
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+func Test_using_visual_position()
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+ " this was using freed memory
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+ new
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+ exe "norm 0o\<Esc>\<C-V>k\<C-X>o0"
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+ /\%V
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+ bwipe!
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+endfunc
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+
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" vim: shiftwidth=2 sts=2 expandtab
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