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Reject negative lengths in MutableShareFile._read_share_data and readv

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This commit is contained in:
Jean-Paul Calderone 2021-10-18 20:13:24 -04:00
parent 5e58b62979
commit 3cd9a02c81
1 changed files with 1 additions and 1 deletions
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2
src/allmydata/storage/mutable.py
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@ -120,6 +120,7 @@ class MutableShareFile(object):
def _read_share_data(self, f, offset, length):
precondition(offset >= 0)
precondition(length >= 0)
data_length = self._read_data_length(f)
if offset+length > data_length:
# reads beyond the end of the data are truncated. Reads that
@ -454,4 +455,3 @@ def create_mutable_sharefile(filename, my_nodeid, write_enabler, parent):
ms.create(my_nodeid, write_enabler)
del ms
return MutableShareFile(filename, parent)