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[screen-devel] [bug #60030] Screen segfaults by displaying some UTF-8 ch
From: |
Michael Schröder |
Subject: |
[screen-devel] [bug #60030] Screen segfaults by displaying some UTF-8 character combination |
Date: |
Wed, 10 Feb 2021 08:59:15 -0500 (EST) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36 |
Follow-up Comment #1, bug #60030 (project screen):
Try this:
diff --git a/src/encoding.c b/src/encoding.c
index 11c3c41..e1ea364 100644
--- a/src/encoding.c
+++ b/src/encoding.c
@@ -1164,7 +1164,9 @@ void utf8_handle_comb(unsigned int c, struct mchar *mc)
if (c1 >= 0xd800 && c1 < 0xe000)
comb_tofront(root, c1 - 0xd800);
i = combchars[root]->prev;
- if (c1 == i + 0xd800) {
+ if (i == (unsigned int)root)
+ i = combchars[root ^ 1]->prev; /* steal from other
root */
+ if (i == 0x800 || i == 0x801 || c1 == i + 0xd800) {
/* completely full, can't recycle */
mc->image = '?';
mc->font = 0;
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- [screen-devel] [bug #60030] Screen segfaults by displaying some UTF-8 character combination, Felix Weinmann, 2021/02/09
- Re: [screen-devel] [bug #60030] [CVE-2021-26937] Screen segfaults by displaying some UTF-8 character combination, Axel Beckert, 2021/02/10
- [screen-devel] [bug #60030] Screen segfaults by displaying some UTF-8 character combination,
Michael Schröder <=
- Re: [screen-devel] [bug #60030] Screen segfaults by displaying some UTF-8 character combination, Michael Schroeder, 2021/02/11
- Re: [screen-devel] [bug #60030] Screen segfaults by displaying some UTF-8 character combination, Axel Beckert, 2021/02/11
- Re: [screen-devel] [bug #60030] Screen segfaults by displaying some UTF-8 character combination, Michael Schroeder, 2021/02/11
- Re: [screen-devel] [bug #60030] Screen segfaults by displaying some UTF-8 character combination, Axel Beckert, 2021/02/11
- Re: [screen-devel] [bug #60030] Screen segfaults by displaying some UTF-8 character combination, Michael Schroeder, 2021/02/12