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comparison src/regexp.c @ 29527:e7158d889784 v9.0.0105

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patch 9.0.0105: illegal memory access when pattern starts with illegal byte Commit: https://github.com/vim/vim/commit/f50940531dd57135fe60aa393ac9d3281f352d88 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jul 29 16:22:25 2022 +0100 patch 9.0.0105: illegal memory access when pattern starts with illegal byte Problem: Illegal memory access when pattern starts with illegal byte. Solution: Do not match a character with an illegal byte.
author Bram Moolenaar <Bram@vim.org>
date Fri, 29 Jul 2022 17:30:03 +0200
parents 057c26b5c33a
children a63d3a0e9aba
comparison
equal deleted inserted replaced
29526:575f2686d4a8 29527:e7158d889784
1639 { 1639 {
1640 for (p = s; *p != NUL; p += (*mb_ptr2len)(p)) 1640 for (p = s; *p != NUL; p += (*mb_ptr2len)(p))
1641 { 1641 {
1642 if (enc_utf8 && c > 0x80) 1642 if (enc_utf8 && c > 0x80)
1643 { 1643 {
1644 if (utf_fold(utf_ptr2char(p)) == cc) 1644 int uc = utf_ptr2char(p);
1645
1646 // Do not match an illegal byte. E.g. 0xff matches 0xc3 0xbf,
1647 // not 0xff.
1648 if ((uc < 0x80 || uc != *p) && utf_fold(uc) == cc)
1645 return p; 1649 return p;
1646 } 1650 }
1647 else if (*p == c || *p == cc) 1651 else if (*p == c || *p == cc)
1648 return p; 1652 return p;
1649 } 1653 }