bpo-29774: Improve error reporting for corrupted extra field in ZIP f… · python/cpython@feccdb2 (original) (raw)
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Commit feccdb2
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bpo-29774: Improve error reporting for corrupted extra field in ZIP file. (#583)
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1 file changed
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1 file changed
lines changed
Lines changed: 3 additions & 1 deletion
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -438,7 +438,9 @@ def _decodeExtra(self): | ||
| 438 | 438 | unpack = struct.unpack |
| 439 | 439 | while len(extra) >= 4: |
| 440 | 440 | tp, ln = unpack('<HH', extra[:4]) |
| 441 | -if tp == 1: | |
| 441 | +if ln+4 > len(extra): | |
| 442 | +raise BadZipFile("Corrupt extra field %04x (size=%d)" % (tp, ln)) | |
| 443 | +if tp == 0x0001: | |
| 442 | 444 | if ln >= 24: |
| 443 | 445 | counts = unpack('<QQQ', extra[4:28]) |
| 444 | 446 | elif ln == 16: |