t/t7415-submodule-names.sh

   1 #!/bin/sh
   2
   3 test_description='check handling of .. in submodule names
   4
   5 Exercise the name-checking function on a variety of names, and then give a
   6 real-world setup that confirms we catch this in practice.
   7 '
   8 . ./test-lib.sh
   9 . "$TEST_DIRECTORY"/lib-pack.sh
  10
  11 test_expect_success 'check names' '
  12         cat >expect <<-\EOF &&
  13         valid
  14         valid/with/paths
  15         EOF
  16
  17         git submodule--helper check-name >actual <<-\EOF &&
  18         valid
  19         valid/with/paths
  20
  21         ../foo
  22         /../foo
  23         ..\foo
  24         \..\foo
  25         foo/..
  26         foo/../
  27         foo\..
  28         foo\..\
  29         foo/../bar
  30         EOF
  31
  32         test_cmp expect actual
  33 '
  34
  35 test_expect_success 'create innocent subrepo' '
  36         git init innocent &&
  37         git -C innocent commit --allow-empty -m foo
  38 '
  39
  40 test_expect_success 'submodule add refuses invalid names' '
  41         test_must_fail \
  42                 git submodule add --name ../../modules/evil "$PWD/innocent" evil
  43 '
  44
  45 test_expect_success 'add evil submodule' '
  46         git submodule add "$PWD/innocent" evil &&
  47
  48         mkdir modules &&
  49         cp -r .git/modules/evil modules &&
  50         write_script modules/evil/hooks/post-checkout <<-\EOF &&
  51         echo >&2 "RUNNING POST CHECKOUT"
  52         EOF
  53
  54         git config -f .gitmodules submodule.evil.update checkout &&
  55         git config -f .gitmodules --rename-section \
  56                 submodule.evil submodule.../../modules/evil &&
  57         git add modules &&
  58         git commit -am evil
  59 '
  60
  61 # This step seems like it shouldn't be necessary, since the payload is
  62 # contained entirely in the evil submodule. But due to the vagaries of the
  63 # submodule code, checking out the evil module will fail unless ".git/modules"
  64 # exists. Adding another submodule (with a name that sorts before "evil") is an
  65 # easy way to make sure this is the case in the victim clone.
  66 test_expect_success 'add other submodule' '
  67         git submodule add "$PWD/innocent" another-module &&
  68         git add another-module &&
  69         git commit -am another
  70 '
  71
  72 test_expect_success 'clone evil superproject' '
  73         git clone --recurse-submodules . victim >output 2>&1 &&
  74         ! grep "RUNNING POST CHECKOUT" output
  75 '
  76
  77 test_expect_success 'fsck detects evil superproject' '
  78         test_must_fail git fsck
  79 '
  80
  81 test_expect_success 'transfer.fsckObjects detects evil superproject (unpack)' '
  82         rm -rf dst.git &&
  83         git init --bare dst.git &&
  84         git -C dst.git config transfer.fsckObjects true &&
  85         test_must_fail git push dst.git HEAD
  86 '
  87
  88 test_expect_success 'transfer.fsckObjects detects evil superproject (index)' '
  89         rm -rf dst.git &&
  90         git init --bare dst.git &&
  91         git -C dst.git config transfer.fsckObjects true &&
  92         git -C dst.git config transfer.unpackLimit 1 &&
  93         test_must_fail git push dst.git HEAD
  94 '
  95
  96 # Normally our packs contain commits followed by trees followed by blobs. This
  97 # reverses the order, which requires backtracking to find the context of a
  98 # blob. We'll start with a fresh gitmodules-only tree to make it simpler.
  99 test_expect_success 'create oddly ordered pack' '
 100         git checkout --orphan odd &&
 101         git rm -rf --cached . &&
 102         git add .gitmodules &&
 103         git commit -m odd &&
 104         {
 105                 pack_header 3 &&
 106                 pack_obj $(git rev-parse HEAD:.gitmodules) &&
 107                 pack_obj $(git rev-parse HEAD^{tree}) &&
 108                 pack_obj $(git rev-parse HEAD)
 109         } >odd.pack &&
 110         pack_trailer odd.pack
 111 '
 112
 113 test_expect_success 'transfer.fsckObjects handles odd pack (unpack)' '
 114         rm -rf dst.git &&
 115         git init --bare dst.git &&
 116         test_must_fail git -C dst.git unpack-objects --strict <odd.pack
 117 '
 118
 119 test_expect_success 'transfer.fsckObjects handles odd pack (index)' '
 120         rm -rf dst.git &&
 121         git init --bare dst.git &&
 122         test_must_fail git -C dst.git index-pack --strict --stdin <odd.pack
 123 '
 124
 125 test_expect_success 'fsck detects symlinked .gitmodules file' '
 126         git init symlink &&
 127         (
 128                 cd symlink &&
 129
 130                 # Make the tree directly to avoid index restrictions.
 131                 #
 132                 # Because symlinks store the target as a blob, choose
 133                 # a pathname that could be parsed as a .gitmodules file
 134                 # to trick naive non-symlink-aware checking.
 135                 tricky="[foo]bar=true" &&
 136                 content=$(git hash-object -w ../.gitmodules) &&
 137                 target=$(printf "$tricky" | git hash-object -w --stdin) &&
 138                 tree=$(
 139                         {
 140                                 printf "100644 blob $content\t$tricky\n" &&
 141                                 printf "120000 blob $target\t.gitmodules\n"
 142                         } | git mktree
 143                 ) &&
 144                 commit=$(git commit-tree $tree) &&
 145
 146                 # Check not only that we fail, but that it is due to the
 147                 # symlink detector; this grep string comes from the config
 148                 # variable name and will not be translated.
 149                 test_must_fail git fsck 2>output &&
 150                 grep gitmodulesSymlink output
 151         )
 152 '
 153
 154 test_expect_success MINGW 'prevent git~1 squatting on Windows' '
 155         git init squatting &&
 156         (
 157                 cd squatting &&
 158                 mkdir a &&
 159                 touch a/..git &&
 160                 git add a/..git &&
 161                 test_tick &&
 162                 git commit -m initial &&
 163
 164                 modules="$(test_write_lines \
 165                         "[submodule \"b.\"]" "url = ." "path = c" \
 166                         "[submodule \"b\"]" "url = ." "path = d\\\\a" |
 167                         git hash-object -w --stdin)" &&
 168                 rev="$(git rev-parse --verify HEAD)" &&
 169                 hash="$(echo x | git hash-object -w --stdin)" &&
 170                 git -c core.protectNTFS=false update-index --add \
 171                         --cacheinfo 100644,$modules,.gitmodules \
 172                         --cacheinfo 160000,$rev,c \
 173                         --cacheinfo 160000,$rev,d\\a \
 174                         --cacheinfo 100644,$hash,d./a/x \
 175                         --cacheinfo 100644,$hash,d./a/..git &&
 176                 test_tick &&
 177                 git -c core.protectNTFS=false commit -m "module" &&
 178                 test_must_fail git show HEAD: 2>err &&
 179                 test_i18ngrep backslash err
 180         ) &&
 181         test_must_fail git -c core.protectNTFS=false \
 182                 clone --recurse-submodules squatting squatting-clone 2>err &&
 183         test_i18ngrep -e "directory not empty" -e "not an empty directory" err &&
 184         ! grep gitdir squatting-clone/d/a/git~2
 185 '
 186
 187 test_expect_success 'git dirs of sibling submodules must not be nested' '
 188         git init nested &&
 189         test_commit -C nested nested &&
 190         (
 191                 cd nested &&
 192                 cat >.gitmodules <<-EOF &&
 193                 [submodule "hippo"]
 194                         url = .
 195                         path = thing1
 196                 [submodule "hippo/hooks"]
 197                         url = .
 198                         path = thing2
 199                 EOF
 200                 git clone . thing1 &&
 201                 git clone . thing2 &&
 202                 git add .gitmodules thing1 thing2 &&
 203                 test_tick &&
 204                 git commit -m nested
 205         ) &&
 206         test_must_fail git clone --recurse-submodules nested clone 2>err &&
 207         test_i18ngrep "is inside git dir" err
 208 '
 209
 210 test_done