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[Bug #1074261, patch #1074381] Restrict the size of chunks read from the file in order to avoid overflow or huge memory consumption. Patch by Mark Eichin

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This commit is contained in:
Andrew M. Kuchling 2005-06-09 14:19:32 +00:00
parent a6f68e1b1f
commit 01cb47b59c
2 changed files with 26 additions and 2 deletions
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5
Lib/gzip.py
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@ -55,6 +55,7 @@ class GzipFile:
"""
myfileobj = None
max_read_chunk = 10 * 1024 * 1024 # 10Mb
def __init__(self, filename=None, mode=None,
compresslevel=9, fileobj=None):
@ -215,14 +216,14 @@ class GzipFile:
try:
while True:
self._read(readsize)
readsize = readsize * 2
readsize = min(self.max_read_chunk, readsize * 2)
except EOFError:
size = self.extrasize
else: # just get some more of it
try:
while size > self.extrasize:
self._read(readsize)
readsize = readsize * 2
readsize = min(self.max_read_chunk, readsize * 2)
except EOFError:
if size > self.extrasize:
size = self.extrasize