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Avoid crashes on TTY frames with over-long compositions

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* src/term.c (encode_terminal_code): Each character from an
automatic composition is a multibyte character, so its multibyte
representation can take up to MAX_MULTIBYTE_LENGTH bytes.
Account for that when allocating storage for characters to be
encoded.  (Bug#40913)
This commit is contained in:
Eli Zaretskii 2020-04-28 11:57:16 +03:00
parent 0278741676
commit 16fed05ba8
1 changed files with 1 additions and 1 deletions
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2
src/term.c
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@ -563,8 +563,8 @@ encode_terminal_code (struct glyph *src, int src_len,
{ {
cmp = composition_table[src->u.cmp.id]; cmp = composition_table[src->u.cmp.id];
required = cmp->glyph_len; required = cmp->glyph_len;
required *= MAX_MULTIBYTE_LENGTH;
} }
required *= MAX_MULTIBYTE_LENGTH;
if (encode_terminal_src_size - nbytes < required) if (encode_terminal_src_size - nbytes < required)
{ {