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[ruby/yarp] fix: trailing decimal, binary, octal, and hex numbers at end of file

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Previously this resulted in invalid memory access.

Found by the fuzzer.

https://github.com/ruby/yarp/commit/af5b85a27a
This commit is contained in:
Mike Dalessio 2023-08-29 22:40:29 -04:00 committed by git
parent c83552a596
commit 46e47404a8
2 changed files with 12 additions and 4 deletions
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4
test/yarp/fuzzer_test.rb
View File

@ -17,4 +17,8 @@ class FuzzerTest < Test::Unit::TestCase
snippet "incomplete escaped string", '"\\'
snippet "trailing comment", "1\n#\n"
snippet "trailing asterisk", "a *"
snippet "incomplete decimal number", "0d"
snippet "incomplete binary number", "0b"
snippet "incomplete octal number", "0o"
snippet "incomplete hex number", "0x"
end

12
yarp/yarp.c
View File

@ -4997,7 +4997,8 @@ lex_numeric_prefix(yp_parser_t *parser) {
// 0d1111 is a decimal number
case 'd':
case 'D':
if (yp_char_is_decimal_digit(*++parser->current.end)) {
parser->current.end++;
if (yp_char_is_decimal_digit(peek(parser))) {
parser->current.end += yp_strspn_decimal_number(parser->current.end, parser->end - parser->current.end);
} else {
yp_diagnostic_list_append(&parser->error_list, parser->current.start, parser->current.end, "Invalid decimal number.");
@ -5008,7 +5009,8 @@ lex_numeric_prefix(yp_parser_t *parser) {
// 0b1111 is a binary number
case 'b':
case 'B':
if (yp_char_is_binary_digit(*++parser->current.end)) {
parser->current.end++;
if (yp_char_is_binary_digit(peek(parser))) {
parser->current.end += yp_strspn_binary_number(parser->current.end, parser->end - parser->current.end);
} else {
yp_diagnostic_list_append(&parser->error_list, parser->current.start, parser->current.end, "Invalid binary number.");
@ -5019,7 +5021,8 @@ lex_numeric_prefix(yp_parser_t *parser) {
// 0o1111 is an octal number
case 'o':
case 'O':
if (yp_char_is_octal_digit(*++parser->current.end)) {
parser->current.end++;
if (yp_char_is_octal_digit(peek(parser))) {
parser->current.end += yp_strspn_octal_number(parser->current.end, parser->end - parser->current.end);
} else {
yp_diagnostic_list_append(&parser->error_list, parser->current.start, parser->current.end, "Invalid octal number.");
@ -5043,7 +5046,8 @@ lex_numeric_prefix(yp_parser_t *parser) {
// 0x1111 is a hexadecimal number
case 'x':
case 'X':
if (yp_char_is_hexadecimal_digit(*++parser->current.end)) {
parser->current.end++;
if (yp_char_is_hexadecimal_digit(peek(parser))) {
parser->current.end += yp_strspn_hexadecimal_number(parser->current.end, parser->end - parser->current.end);
} else {
yp_diagnostic_list_append(&parser->error_list, parser->current.start, parser->current.end, "Invalid hexadecimal number.");