view mercurial/cacheutil.py @ 38187:90a274965de7 stable

mpatch: be more careful about parsing binary patch data (SEC)

It appears to have been possible to trivially walk off the end of an
allocated region with a malformed patch. Oops.

Caught when writing an mpatch fuzzer for oss-fuzz.

This defect is OVE-20180430-0001. A CVE has not been obtained as of
this writing.

# scmutil.py - Mercurial core utility functions
#
#  Copyright Matt Mackall <[e-mail]> and other
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import

from . import repoview

def cachetocopy(srcrepo):
    """return the list of cache file valuable to copy during a clone"""
    # In local clones we're copying all nodes, not just served
    # ones. Therefore copy all branch caches over.
    cachefiles = ['branch2']
    cachefiles += ['branch2-%s' % f for f in repoview.filtertable]
    cachefiles += ['rbc-names-v1', 'rbc-revs-v1']
    cachefiles += ['tags2']
    cachefiles += ['tags2-%s' % f for f in repoview.filtertable]
    cachefiles += ['hgtagsfnodes1']
    return cachefiles