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std.compress.zstandard: fix fse decoding crash

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This commit is contained in:
dweiller 2023-02-04 11:39:48 +11:00
parent 1c509f483a
commit a625df4636
1 changed files with 2 additions and 0 deletions
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2
lib/std/compress/zstandard/decode/fse.zig
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@ -46,6 +46,7 @@ pub fn decodeFseTable(
if (value == 1) {
while (true) {
const repeat_flag = try bit_reader.readBitsNoEof(u2, 2);
if (repeat_flag + value_count > 256) return error.MalformedFseTable;
var i: usize = 0;
while (i < repeat_flag) : (i += 1) {
values[value_count] = 1;
@ -54,6 +55,7 @@ pub fn decodeFseTable(
if (repeat_flag < 3) break;
}
}
if (value_count == 256) break;
}
bit_reader.alignToByte();