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[3.12] gh-107450: Check for overflow in the tokenizer and fix overflow test (GH-110832) (#110931)

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(cherry picked from commit a1ac5590e0)

Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
Co-authored-by: Filipe Laíns <lains@riseup.net>
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Lysandros Nikolaou 2023-10-16 18:59:18 +02:00 • committed by GitHub
parent b8e5b1b28a
commit 3b87e520fc
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4 changed files with 40 additions and 29 deletions
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Parser/tokenizer.c
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@ -1366,6 +1366,10 @@ tok_nextc(struct tok_state *tok)
int rc;
for (;;) {
if (tok->cur != tok->inp) {
if ((unsigned int) tok->col_offset >= (unsigned int) INT_MAX) {
tok->done = E_COLUMNOVERFLOW;
return EOF;
}
tok->col_offset++;
return Py_CHARMASK(*tok->cur++); /* Fast path */
}