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b6500d |
diff -up vim80/src/regexp.c.cve4192 vim80/src/regexp.c
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--- vim80/src/regexp.c.cve4192 2022-01-12 15:21:44.792239040 +0100
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+++ vim80/src/regexp.c 2022-01-12 15:34:35.190425880 +0100
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b6500d |
@@ -4203,9 +4203,9 @@ 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)(reginput - regline);
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if (mode == 'v')
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{
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- col = (colnr_T)(reginput - regline);
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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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b6500d |
@@ -4220,7 +4220,12 @@ 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, regline, (colnr_T)(reginput - regline));
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+
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+ // getvvcol() flushes rex.line, need to get it again
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+ regline = reg_getline(reglnum);
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+ reginput = regline + col;
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+
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+ cols = win_linetabsize(wp, regline, col);
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if (cols < start || cols > end - (*p_sel == 'e'))
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return FALSE;
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b6500d |
}
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b6500d |
diff -up vim80/src/testdir/test_regexp_latin.vim.cve4192 vim80/src/testdir/test_regexp_latin.vim
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b6500d |
--- vim80/src/testdir/test_regexp_latin.vim.cve4192 2022-01-12 15:21:44.792239040 +0100
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b6500d |
+++ vim80/src/testdir/test_regexp_latin.vim 2022-01-12 15:36:12.499693099 +0100
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b6500d |
@@ -80,3 +80,13 @@ func Test_using_invalid_visual_position(
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/\%V
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b6500d |
bwipe!
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b6500d |
endfunc
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+
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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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