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 $(git rev-parse HEAD)
 109         } >odd.pack &&
 110         pack_trailer odd.pack
 111 '
 112
 113 test_expect_success 'transfer.fsckObjects handles odd pack (unpack)' '
 114         rm -rf dst.git &&
 115         git init --bare dst.git &&
 116         test_must_fail git -C dst.git unpack-objects --strict <odd.pack
 117 '
 118
 119 test_expect_success 'transfer.fsckObjects handles odd pack (index)' '
 120         rm -rf dst.git &&
 121         git init --bare dst.git &&
 122         test_must_fail git -C dst.git index-pack --strict --stdin <odd.pack
 123 '
 124
 125 test_expect_success 'index-pack --strict works for non-repo pack' '
 126         rm -rf dst.git &&
 127         git init --bare dst.git &&
 128         cp odd.pack dst.git &&
 129         test_must_fail git -C dst.git index-pack --strict odd.pack 2>output &&
 130         # Make sure we fail due to bad gitmodules content, not because we
 131         # could not read the blob in the first place.
 132         grep gitmodulesName output
 133 '
 134
 135 test_expect_success 'fsck detects symlinked .gitmodules file' '
 136         git init symlink &&
 137         (
 138                 cd symlink &&
 139
 140                 # Make the tree directly to avoid index restrictions.
 141                 #
 142                 # Because symlinks store the target as a blob, choose
 143                 # a pathname that could be parsed as a .gitmodules file
 144                 # to trick naive non-symlink-aware checking.
 145                 tricky="[foo]bar=true" &&
 146                 content=$(git hash-object -w ../.gitmodules) &&
 147                 target=$(printf "$tricky" | git hash-object -w --stdin) &&
 148                 {
 149                         printf "100644 blob $content\t$tricky\n" &&
 150                         printf "120000 blob $target\t.gitmodules\n"
 151                 } | git mktree &&
 152
 153                 # Check not only that we fail, but that it is due to the
 154                 # symlink detector; this grep string comes from the config
 155                 # variable name and will not be translated.
 156                 test_must_fail git fsck 2>output &&
 157                 grep gitmodulesSymlink output
 158         )
 159 '
 160
 161 test_expect_success 'fsck detects non-blob .gitmodules' '
 162         git init non-blob &&
 163         (
 164                 cd non-blob &&
 165
 166                 # As above, make the funny tree directly to avoid index
 167                 # restrictions.
 168                 mkdir subdir &&
 169                 cp ../.gitmodules subdir/file &&
 170                 git add subdir/file &&
 171                 git commit -m ok &&
 172                 git ls-tree HEAD | sed s/subdir/.gitmodules/ | git mktree &&
 173
 174                 test_must_fail git fsck 2>output &&
 175                 grep gitmodulesBlob output
 176         )
 177 '
 178
 179 test_done