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avoid getting stuck on non-UTF-8 symbol encodings in bytecode

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Found by fuzz tester, and this bug seems to be a common reason for
the fuzz test to time out.
This commit is contained in:
Matthew Flatt 2014-06-23 13:23:47 +01:00
parent 431321f2cb
commit 6a5a3037b4
1 changed files with 2 additions and 2 deletions
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4
racket/src/racket/src/symbol.c
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@ -611,11 +611,11 @@ const char *scheme_symbol_name_and_size(Scheme_Object *sym, uintptr_t *length, i
if (ch > 127) { if (ch > 127) {
/* Decode UTF-8. */ /* Decode UTF-8. */
mzchar buf[2]; mzchar buf[2];
int ul = 2; int ul = 1;
while (1) { while (1) {
if (scheme_utf8_decode((unsigned char *)s, i, i + ul, if (scheme_utf8_decode((unsigned char *)s, i, i + ul,
buf, 0, 1, buf, 0, 1,
NULL, 0, 0) > 0) NULL, 0, '?') > 0)
break; break;
ul++; ul++;
} }