mirror of
https://github.com/git/git.git
synced 2024-12-15 04:46:02 +08:00
416449eaba
Various test and documentation updates about .gitsomething paths that are symlinks. * jk/symlinked-dotgitx-cleanup: docs: document symlink restrictions for dot-files fsck: warn about symlinked dotfiles we'll open with O_NOFOLLOW t0060: test ntfs/hfs-obscured dotfiles t7450: test .gitmodules symlink matching against obscured names t7450: test verify_path() handling of gitmodules t7415: rename to expand scope fsck_tree(): wrap some long lines fsck_tree(): fix shadowed variable t7415: remove out-dated comment about translation
315 lines
8.3 KiB
Bash
Executable File
315 lines
8.3 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
test_description='check broken or malicious patterns in .git* files
|
|
|
|
Such as:
|
|
|
|
- presence of .. in submodule names;
|
|
Exercise the name-checking function on a variety of names, and then give a
|
|
real-world setup that confirms we catch this in practice.
|
|
|
|
- nested submodule names
|
|
|
|
- symlinked .gitmodules, etc
|
|
'
|
|
. ./test-lib.sh
|
|
. "$TEST_DIRECTORY"/lib-pack.sh
|
|
|
|
test_expect_success 'check names' '
|
|
cat >expect <<-\EOF &&
|
|
valid
|
|
valid/with/paths
|
|
EOF
|
|
|
|
git submodule--helper check-name >actual <<-\EOF &&
|
|
valid
|
|
valid/with/paths
|
|
|
|
../foo
|
|
/../foo
|
|
..\foo
|
|
\..\foo
|
|
foo/..
|
|
foo/../
|
|
foo\..
|
|
foo\..\
|
|
foo/../bar
|
|
EOF
|
|
|
|
test_cmp expect actual
|
|
'
|
|
|
|
test_expect_success 'create innocent subrepo' '
|
|
git init innocent &&
|
|
git -C innocent commit --allow-empty -m foo
|
|
'
|
|
|
|
test_expect_success 'submodule add refuses invalid names' '
|
|
test_must_fail \
|
|
git submodule add --name ../../modules/evil "$PWD/innocent" evil
|
|
'
|
|
|
|
test_expect_success 'add evil submodule' '
|
|
git submodule add "$PWD/innocent" evil &&
|
|
|
|
mkdir modules &&
|
|
cp -r .git/modules/evil modules &&
|
|
write_script modules/evil/hooks/post-checkout <<-\EOF &&
|
|
echo >&2 "RUNNING POST CHECKOUT"
|
|
EOF
|
|
|
|
git config -f .gitmodules submodule.evil.update checkout &&
|
|
git config -f .gitmodules --rename-section \
|
|
submodule.evil submodule.../../modules/evil &&
|
|
git add modules &&
|
|
git commit -am evil
|
|
'
|
|
|
|
# This step seems like it shouldn't be necessary, since the payload is
|
|
# contained entirely in the evil submodule. But due to the vagaries of the
|
|
# submodule code, checking out the evil module will fail unless ".git/modules"
|
|
# exists. Adding another submodule (with a name that sorts before "evil") is an
|
|
# easy way to make sure this is the case in the victim clone.
|
|
test_expect_success 'add other submodule' '
|
|
git submodule add "$PWD/innocent" another-module &&
|
|
git add another-module &&
|
|
git commit -am another
|
|
'
|
|
|
|
test_expect_success 'clone evil superproject' '
|
|
git clone --recurse-submodules . victim >output 2>&1 &&
|
|
! grep "RUNNING POST CHECKOUT" output
|
|
'
|
|
|
|
test_expect_success 'fsck detects evil superproject' '
|
|
test_must_fail git fsck
|
|
'
|
|
|
|
test_expect_success 'transfer.fsckObjects detects evil superproject (unpack)' '
|
|
rm -rf dst.git &&
|
|
git init --bare dst.git &&
|
|
git -C dst.git config transfer.fsckObjects true &&
|
|
test_must_fail git push dst.git HEAD
|
|
'
|
|
|
|
test_expect_success 'transfer.fsckObjects detects evil superproject (index)' '
|
|
rm -rf dst.git &&
|
|
git init --bare dst.git &&
|
|
git -C dst.git config transfer.fsckObjects true &&
|
|
git -C dst.git config transfer.unpackLimit 1 &&
|
|
test_must_fail git push dst.git HEAD
|
|
'
|
|
|
|
# Normally our packs contain commits followed by trees followed by blobs. This
|
|
# reverses the order, which requires backtracking to find the context of a
|
|
# blob. We'll start with a fresh gitmodules-only tree to make it simpler.
|
|
test_expect_success 'create oddly ordered pack' '
|
|
git checkout --orphan odd &&
|
|
git rm -rf --cached . &&
|
|
git add .gitmodules &&
|
|
git commit -m odd &&
|
|
{
|
|
pack_header 3 &&
|
|
pack_obj $(git rev-parse HEAD:.gitmodules) &&
|
|
pack_obj $(git rev-parse HEAD^{tree}) &&
|
|
pack_obj $(git rev-parse HEAD)
|
|
} >odd.pack &&
|
|
pack_trailer odd.pack
|
|
'
|
|
|
|
test_expect_success 'transfer.fsckObjects handles odd pack (unpack)' '
|
|
rm -rf dst.git &&
|
|
git init --bare dst.git &&
|
|
test_must_fail git -C dst.git unpack-objects --strict <odd.pack
|
|
'
|
|
|
|
test_expect_success 'transfer.fsckObjects handles odd pack (index)' '
|
|
rm -rf dst.git &&
|
|
git init --bare dst.git &&
|
|
test_must_fail git -C dst.git index-pack --strict --stdin <odd.pack
|
|
'
|
|
|
|
test_expect_success 'index-pack --strict works for non-repo pack' '
|
|
rm -rf dst.git &&
|
|
git init --bare dst.git &&
|
|
cp odd.pack dst.git &&
|
|
test_must_fail git -C dst.git index-pack --strict odd.pack 2>output &&
|
|
# Make sure we fail due to bad gitmodules content, not because we
|
|
# could not read the blob in the first place.
|
|
grep gitmodulesName output
|
|
'
|
|
|
|
check_dotx_symlink () {
|
|
fsck_must_fail=test_must_fail
|
|
fsck_prefix=error
|
|
refuse_index=t
|
|
case "$1" in
|
|
--warning)
|
|
fsck_must_fail=
|
|
fsck_prefix=warning
|
|
refuse_index=
|
|
shift
|
|
;;
|
|
esac
|
|
|
|
name=$1
|
|
type=$2
|
|
path=$3
|
|
dir=symlink-$name-$type
|
|
|
|
test_expect_success "set up repo with symlinked $name ($type)" '
|
|
git init $dir &&
|
|
(
|
|
cd $dir &&
|
|
|
|
# Make the tree directly to avoid index restrictions.
|
|
#
|
|
# Because symlinks store the target as a blob, choose
|
|
# a pathname that could be parsed as a .gitmodules file
|
|
# to trick naive non-symlink-aware checking.
|
|
tricky="[foo]bar=true" &&
|
|
content=$(git hash-object -w ../.gitmodules) &&
|
|
target=$(printf "$tricky" | git hash-object -w --stdin) &&
|
|
{
|
|
printf "100644 blob $content\t$tricky\n" &&
|
|
printf "120000 blob $target\t$path\n"
|
|
} >bad-tree
|
|
) &&
|
|
tree=$(git -C $dir mktree <$dir/bad-tree)
|
|
'
|
|
|
|
test_expect_success "fsck detects symlinked $name ($type)" '
|
|
(
|
|
cd $dir &&
|
|
|
|
# Check not only that we fail, but that it is due to the
|
|
# symlink detector
|
|
$fsck_must_fail git fsck 2>output &&
|
|
grep "$fsck_prefix.*tree $tree: ${name}Symlink" output
|
|
)
|
|
'
|
|
|
|
test -n "$refuse_index" &&
|
|
test_expect_success "refuse to load symlinked $name into index ($type)" '
|
|
test_must_fail \
|
|
git -C $dir \
|
|
-c core.protectntfs \
|
|
-c core.protecthfs \
|
|
read-tree $tree 2>err &&
|
|
grep "invalid path.*$name" err &&
|
|
git -C $dir ls-files -s >out &&
|
|
test_must_be_empty out
|
|
'
|
|
}
|
|
|
|
check_dotx_symlink gitmodules vanilla .gitmodules
|
|
check_dotx_symlink gitmodules ntfs ".gitmodules ."
|
|
check_dotx_symlink gitmodules hfs ".${u200c}gitmodules"
|
|
|
|
check_dotx_symlink --warning gitattributes vanilla .gitattributes
|
|
check_dotx_symlink --warning gitattributes ntfs ".gitattributes ."
|
|
check_dotx_symlink --warning gitattributes hfs ".${u200c}gitattributes"
|
|
|
|
check_dotx_symlink --warning gitignore vanilla .gitignore
|
|
check_dotx_symlink --warning gitignore ntfs ".gitignore ."
|
|
check_dotx_symlink --warning gitignore hfs ".${u200c}gitignore"
|
|
|
|
check_dotx_symlink --warning mailmap vanilla .mailmap
|
|
check_dotx_symlink --warning mailmap ntfs ".mailmap ."
|
|
check_dotx_symlink --warning mailmap hfs ".${u200c}mailmap"
|
|
|
|
test_expect_success 'fsck detects non-blob .gitmodules' '
|
|
git init non-blob &&
|
|
(
|
|
cd non-blob &&
|
|
|
|
# As above, make the funny tree directly to avoid index
|
|
# restrictions.
|
|
mkdir subdir &&
|
|
cp ../.gitmodules subdir/file &&
|
|
git add subdir/file &&
|
|
git commit -m ok &&
|
|
git ls-tree HEAD | sed s/subdir/.gitmodules/ | git mktree &&
|
|
|
|
test_must_fail git fsck 2>output &&
|
|
test_i18ngrep gitmodulesBlob output
|
|
)
|
|
'
|
|
|
|
test_expect_success 'fsck detects corrupt .gitmodules' '
|
|
git init corrupt &&
|
|
(
|
|
cd corrupt &&
|
|
|
|
echo "[broken" >.gitmodules &&
|
|
git add .gitmodules &&
|
|
git commit -m "broken gitmodules" &&
|
|
|
|
git fsck 2>output &&
|
|
test_i18ngrep gitmodulesParse output &&
|
|
test_i18ngrep ! "bad config" output
|
|
)
|
|
'
|
|
|
|
test_expect_success WINDOWS 'prevent git~1 squatting on Windows' '
|
|
git init squatting &&
|
|
(
|
|
cd squatting &&
|
|
mkdir a &&
|
|
touch a/..git &&
|
|
git add a/..git &&
|
|
test_tick &&
|
|
git commit -m initial &&
|
|
|
|
modules="$(test_write_lines \
|
|
"[submodule \"b.\"]" "url = ." "path = c" \
|
|
"[submodule \"b\"]" "url = ." "path = d\\\\a" |
|
|
git hash-object -w --stdin)" &&
|
|
rev="$(git rev-parse --verify HEAD)" &&
|
|
hash="$(echo x | git hash-object -w --stdin)" &&
|
|
test_must_fail git update-index --add \
|
|
--cacheinfo 160000,$rev,d\\a 2>err &&
|
|
test_i18ngrep "Invalid path" err &&
|
|
git -c core.protectNTFS=false update-index --add \
|
|
--cacheinfo 100644,$modules,.gitmodules \
|
|
--cacheinfo 160000,$rev,c \
|
|
--cacheinfo 160000,$rev,d\\a \
|
|
--cacheinfo 100644,$hash,d./a/x \
|
|
--cacheinfo 100644,$hash,d./a/..git &&
|
|
test_tick &&
|
|
git -c core.protectNTFS=false commit -m "module"
|
|
) &&
|
|
if test_have_prereq MINGW
|
|
then
|
|
test_must_fail git -c core.protectNTFS=false \
|
|
clone --recurse-submodules squatting squatting-clone 2>err &&
|
|
test_i18ngrep -e "directory not empty" -e "not an empty directory" err &&
|
|
! grep gitdir squatting-clone/d/a/git~2
|
|
fi
|
|
'
|
|
|
|
test_expect_success 'git dirs of sibling submodules must not be nested' '
|
|
git init nested &&
|
|
test_commit -C nested nested &&
|
|
(
|
|
cd nested &&
|
|
cat >.gitmodules <<-EOF &&
|
|
[submodule "hippo"]
|
|
url = .
|
|
path = thing1
|
|
[submodule "hippo/hooks"]
|
|
url = .
|
|
path = thing2
|
|
EOF
|
|
git clone . thing1 &&
|
|
git clone . thing2 &&
|
|
git add .gitmodules thing1 thing2 &&
|
|
test_tick &&
|
|
git commit -m nested
|
|
) &&
|
|
test_must_fail git clone --recurse-submodules nested clone 2>err &&
|
|
test_i18ngrep "is inside git dir" err
|
|
'
|
|
|
|
test_done
|