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dirs: resolve fuzzer OOM situation by disallowing deep directory hierarchies...
dirs: resolve fuzzer OOM situation by disallowing deep directory hierarchies It seems like 2048 directories ought to be enough for any reasonable use of Mercurial? A previous version of this patch scanned for slashes before any allocations occurred. That approach is slower than this in the happy path, but much faster than this in the case that too many slashes are encountered. We may want to revisit it in the future using memchr() so it'll be well-optimized by the libc we're using. .. bc: Mercurial will now defend against OOMs by refusing to operate on paths with 2048 or more components. This means that _extremely_ deep path hierarchies will be rejected, but we anticipate nobody is using hierarchies this deep. Differential Revision: https://phab.mercurial-scm.org/D7411

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r43675:51865531 stable
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buildrpm
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#!/bin/bash -e
#
# Build a Mercurial RPM from the current repo, mainly for Fedora/CentOS/RHEL
. $(dirname $0)/packagelib.sh
BUILD=1
RPMBUILDDIR="$PWD/rpmbuild"
PYTHONEXE=python3
while [ "$1" ]; do
case "$1" in
--prepare )
shift
BUILD=
;;
--python)
shift
PYTHONEXE=$1
shift
;;
--withpython | --with-python)
shift
PYTHONVER=2.7.16
PYTHONMD5=f1a2ace631068444831d01485466ece0
PYTHONEXE=python
;;
--rpmbuilddir )
shift
RPMBUILDDIR="$1"
shift
;;
* )
echo "Invalid parameter $1!" 1>&2
exit 1
;;
esac
done
cd "`dirname $0`/../.."
specfile=$PWD/contrib/packaging/mercurial.spec
if [ ! -f $specfile ]; then
echo "Cannot find $specfile!" 1>&2
exit 1
fi
if [ ! -d .hg ]; then
echo 'You are not inside a Mercurial repository!' 1>&2
exit 1
fi
gethgversion
if [ -z "$type" ] ; then
release=1
else
release=0.9_$type
fi
if [ -n "$distance" ] ; then
release=$release+${distance}_${node}
fi
if [ "$PYTHONVER" ]; then
release=$release+$PYTHONVER
RPMPYTHONVER=$PYTHONVER
else
RPMPYTHONVER=%{nil}
fi
mkdir -p $RPMBUILDDIR/{SOURCES,BUILD,SRPMS,RPMS}
$HG archive -t tgz $RPMBUILDDIR/SOURCES/mercurial-$version-$release.tar.gz
if [ "$PYTHONVER" ]; then
(
mkdir -p build
cd build
PYTHON_SRCFILE=Python-$PYTHONVER.tgz
[ -f $PYTHON_SRCFILE ] || curl -Lo $PYTHON_SRCFILE http://www.python.org/ftp/python/$PYTHONVER/$PYTHON_SRCFILE
if [ "$PYTHONMD5" ]; then
echo "$PYTHONMD5 $PYTHON_SRCFILE" | md5sum -w -c
fi
ln -f $PYTHON_SRCFILE $RPMBUILDDIR/SOURCES/$PYTHON_SRCFILE
DOCUTILSVER=`sed -ne "s/^%global docutilsname docutils-//p" $specfile`
DOCUTILS_SRCFILE=docutils-$DOCUTILSVER.tar.gz
[ -f $DOCUTILS_SRCFILE ] || curl -Lo $DOCUTILS_SRCFILE http://downloads.sourceforge.net/project/docutils/docutils/$DOCUTILSVER/$DOCUTILS_SRCFILE
DOCUTILSMD5=`sed -ne "s/^%global docutilsmd5 //p" $specfile`
if [ "$DOCUTILSMD5" ]; then
echo "$DOCUTILSMD5 $DOCUTILS_SRCFILE" | md5sum -w -c
fi
ln -f $DOCUTILS_SRCFILE $RPMBUILDDIR/SOURCES/$DOCUTILS_SRCFILE
)
fi
mkdir -p $RPMBUILDDIR/SPECS
rpmspec=$RPMBUILDDIR/SPECS/mercurial.spec
sed -e "s,^Version:.*,Version: $version," \
-e "s,^Release:.*,Release: $release," \
-e "s/^%global pythonexe .*/%global pythonexe $PYTHONEXE/" \
$specfile > $rpmspec
echo >> $rpmspec
echo "%changelog" >> $rpmspec
if echo $version | grep '+' > /dev/null 2>&1; then
latesttag="`echo $version | sed -e 's/+.*//'`"
$HG log -r .:"$latesttag" -fM \
--template '{date|hgdate}\t{author}\t{desc|firstline}\n' | python -c '
import sys, time
def datestr(date, format):
return time.strftime(format, time.gmtime(float(date[0]) - date[1]))
changelog = []
for l in sys.stdin.readlines():
tok = l.split("\t")
hgdate = tuple(int(v) for v in tok[0].split())
changelog.append((datestr(hgdate, "%F"), tok[1], hgdate, tok[2]))
prevtitle = ""
for l in sorted(changelog, reverse=True):
title = "* %s %s" % (datestr(l[2], "%a %b %d %Y"), l[1])
if prevtitle != title:
prevtitle = title
print
print(title)
print("- %s" % l[3].strip())
' >> $rpmspec
else
$HG log \
--template '{date|hgdate}\t{author}\t{desc|firstline}\n' \
.hgtags | python -c '
import sys, time
def datestr(date, format):
return time.strftime(format, time.gmtime(float(date[0]) - date[1]))
for l in sys.stdin.readlines():
tok = l.split("\t")
hgdate = tuple(int(v) for v in tok[0].split())
print("* %s %s\n- %s" % (datestr(hgdate, "%a %b %d %Y"), tok[1], tok[2]))
' >> $rpmspec
fi
sed -i \
-e "s/^%define withpython.*$/%define withpython $RPMPYTHONVER/" \
$rpmspec
if [ "$BUILD" ]; then
rpmbuild --define "_topdir $RPMBUILDDIR" -ba $rpmspec --clean
if [ $? = 0 ]; then
echo
echo "Built packages for $version-$release:"
find $RPMBUILDDIR/*RPMS/ -type f -newer $rpmspec
fi
else
echo "Prepared sources for $version-$release $rpmspec are in $RPMBUILDDIR/SOURCES/ - use like:"
echo "rpmbuild --define '_topdir $RPMBUILDDIR' -ba $rpmspec --clean"
fi