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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
commitc8bae7493d2f2910b57f13ded012e86bdcfb0532 (patch)
tree24e09d9f84dec336720cf393e156089ca2835791 /t/t5303-pack-corruption-resilience.sh
parentInitial commit. (diff)
downloadgit-c8bae7493d2f2910b57f13ded012e86bdcfb0532.tar.xz
git-c8bae7493d2f2910b57f13ded012e86bdcfb0532.zip
Adding upstream version 1:2.39.2.upstream/1%2.39.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 't/t5303-pack-corruption-resilience.sh')
-rwxr-xr-xt/t5303-pack-corruption-resilience.sh405
1 files changed, 405 insertions, 0 deletions
diff --git a/t/t5303-pack-corruption-resilience.sh b/t/t5303-pack-corruption-resilience.sh
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+#!/bin/sh
+#
+# Copyright (c) 2008 Nicolas Pitre
+#
+
+test_description='resilience to pack corruptions with redundant objects'
+
+TEST_PASSES_SANITIZE_LEAK=true
+. ./test-lib.sh
+
+# Note: the test objects are created with knowledge of their pack encoding
+# to ensure good code path coverage, and to facilitate direct alteration
+# later on. The assumed characteristics are:
+#
+# 1) blob_2 is a delta with blob_1 for base and blob_3 is a delta with blob2
+# for base, such that blob_3 delta depth is 2;
+#
+# 2) the bulk of object data is uncompressible so the text part remains
+# visible;
+#
+# 3) object header is always 2 bytes.
+
+create_test_files() {
+ test-tool genrandom "foo" 2000 > file_1 &&
+ test-tool genrandom "foo" 1800 > file_2 &&
+ test-tool genrandom "foo" 1800 > file_3 &&
+ echo " base " >> file_1 &&
+ echo " delta1 " >> file_2 &&
+ echo " delta delta2 " >> file_3 &&
+ test-tool genrandom "bar" 150 >> file_2 &&
+ test-tool genrandom "baz" 100 >> file_3
+}
+
+create_new_pack() {
+ rm -rf .git &&
+ git init &&
+ blob_1=$(git hash-object -t blob -w file_1) &&
+ blob_2=$(git hash-object -t blob -w file_2) &&
+ blob_3=$(git hash-object -t blob -w file_3) &&
+ pack=$(printf "$blob_1\n$blob_2\n$blob_3\n" |
+ git pack-objects $@ .git/objects/pack/pack) &&
+ pack=".git/objects/pack/pack-${pack}" &&
+ git verify-pack -v ${pack}.pack
+}
+
+do_repack() {
+ pack=$(printf "$blob_1\n$blob_2\n$blob_3\n" |
+ git pack-objects $@ .git/objects/pack/pack) &&
+ pack=".git/objects/pack/pack-${pack}"
+}
+
+do_corrupt_object() {
+ ofs=$(git show-index < ${pack}.idx | grep $1 | cut -f1 -d" ") &&
+ ofs=$(($ofs + $2)) &&
+ chmod +w ${pack}.pack &&
+ dd of=${pack}.pack bs=1 conv=notrunc seek=$ofs &&
+ test_must_fail git verify-pack ${pack}.pack
+}
+
+printf '\0' > zero
+
+test_expect_success \
+ 'initial setup validation' \
+ 'create_test_files &&
+ create_new_pack &&
+ git prune-packed &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ 'create corruption in header of first object' \
+ 'do_corrupt_object $blob_1 0 < zero &&
+ test_must_fail git cat-file blob $blob_1 > /dev/null &&
+ test_must_fail git cat-file blob $blob_2 > /dev/null &&
+ test_must_fail git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... but having a loose copy allows for full recovery' \
+ 'mv ${pack}.idx tmp &&
+ git hash-object -t blob -w file_1 &&
+ mv tmp ${pack}.idx &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... and loose copy of first delta allows for partial recovery' \
+ 'git prune-packed &&
+ test_must_fail git cat-file blob $blob_2 > /dev/null &&
+ mv ${pack}.idx tmp &&
+ git hash-object -t blob -w file_2 &&
+ mv tmp ${pack}.idx &&
+ test_must_fail git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ 'create corruption in data of first object' \
+ 'create_new_pack &&
+ git prune-packed &&
+ chmod +w ${pack}.pack &&
+ perl -i.bak -pe "s/ base /abcdef/" ${pack}.pack &&
+ test_must_fail git cat-file blob $blob_1 > /dev/null &&
+ test_must_fail git cat-file blob $blob_2 > /dev/null &&
+ test_must_fail git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... but having a loose copy allows for full recovery' \
+ 'mv ${pack}.idx tmp &&
+ git hash-object -t blob -w file_1 &&
+ mv tmp ${pack}.idx &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... and loose copy of second object allows for partial recovery' \
+ 'git prune-packed &&
+ test_must_fail git cat-file blob $blob_2 > /dev/null &&
+ mv ${pack}.idx tmp &&
+ git hash-object -t blob -w file_2 &&
+ mv tmp ${pack}.idx &&
+ test_must_fail git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ 'create corruption in header of first delta' \
+ 'create_new_pack &&
+ git prune-packed &&
+ do_corrupt_object $blob_2 0 < zero &&
+ git cat-file blob $blob_1 > /dev/null &&
+ test_must_fail git cat-file blob $blob_2 > /dev/null &&
+ test_must_fail git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... but having a loose copy allows for full recovery' \
+ 'mv ${pack}.idx tmp &&
+ git hash-object -t blob -w file_2 &&
+ mv tmp ${pack}.idx &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... and then a repack "clears" the corruption' \
+ 'do_repack &&
+ git prune-packed &&
+ git verify-pack ${pack}.pack &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ 'create corruption in data of first delta' \
+ 'create_new_pack &&
+ git prune-packed &&
+ chmod +w ${pack}.pack &&
+ perl -i.bak -pe "s/ delta1 /abcdefgh/" ${pack}.pack &&
+ git cat-file blob $blob_1 > /dev/null &&
+ test_must_fail git cat-file blob $blob_2 > /dev/null &&
+ test_must_fail git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... but having a loose copy allows for full recovery' \
+ 'mv ${pack}.idx tmp &&
+ git hash-object -t blob -w file_2 &&
+ mv tmp ${pack}.idx &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... and then a repack "clears" the corruption' \
+ 'do_repack &&
+ git prune-packed &&
+ git verify-pack ${pack}.pack &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ 'corruption in delta base reference of first delta (OBJ_REF_DELTA)' \
+ 'create_new_pack &&
+ git prune-packed &&
+ do_corrupt_object $blob_2 2 < zero &&
+ git cat-file blob $blob_1 > /dev/null &&
+ test_must_fail git cat-file blob $blob_2 > /dev/null &&
+ test_must_fail git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... but having a loose copy allows for full recovery' \
+ 'mv ${pack}.idx tmp &&
+ git hash-object -t blob -w file_2 &&
+ mv tmp ${pack}.idx &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... and then a repack "clears" the corruption' \
+ 'do_repack &&
+ git prune-packed &&
+ git verify-pack ${pack}.pack &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ 'corruption #0 in delta base reference of first delta (OBJ_OFS_DELTA)' \
+ 'create_new_pack --delta-base-offset &&
+ git prune-packed &&
+ do_corrupt_object $blob_2 2 < zero &&
+ git cat-file blob $blob_1 > /dev/null &&
+ test_must_fail git cat-file blob $blob_2 > /dev/null &&
+ test_must_fail git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... but having a loose copy allows for full recovery' \
+ 'mv ${pack}.idx tmp &&
+ git hash-object -t blob -w file_2 &&
+ mv tmp ${pack}.idx &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... and then a repack "clears" the corruption' \
+ 'do_repack --delta-base-offset &&
+ git prune-packed &&
+ git verify-pack ${pack}.pack &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ 'corruption #1 in delta base reference of first delta (OBJ_OFS_DELTA)' \
+ 'create_new_pack --delta-base-offset &&
+ git prune-packed &&
+ printf "\001" | do_corrupt_object $blob_2 2 &&
+ git cat-file blob $blob_1 > /dev/null &&
+ test_must_fail git cat-file blob $blob_2 > /dev/null &&
+ test_must_fail git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... but having a loose copy allows for full recovery' \
+ 'mv ${pack}.idx tmp &&
+ git hash-object -t blob -w file_2 &&
+ mv tmp ${pack}.idx &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... and then a repack "clears" the corruption' \
+ 'do_repack --delta-base-offset &&
+ git prune-packed &&
+ git verify-pack ${pack}.pack &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... and a redundant pack allows for full recovery too' \
+ 'do_corrupt_object $blob_2 2 < zero &&
+ git cat-file blob $blob_1 > /dev/null &&
+ test_must_fail git cat-file blob $blob_2 > /dev/null &&
+ test_must_fail git cat-file blob $blob_3 > /dev/null &&
+ mv ${pack}.idx tmp &&
+ git hash-object -t blob -w file_1 &&
+ git hash-object -t blob -w file_2 &&
+ printf "$blob_1\n$blob_2\n" | git pack-objects .git/objects/pack/pack &&
+ git prune-packed &&
+ mv tmp ${pack}.idx &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ 'corruption of delta base reference pointing to wrong object' \
+ 'create_new_pack --delta-base-offset &&
+ git prune-packed &&
+ printf "\220\033" | do_corrupt_object $blob_3 2 &&
+ git cat-file blob $blob_1 >/dev/null &&
+ git cat-file blob $blob_2 >/dev/null &&
+ test_must_fail git cat-file blob $blob_3 >/dev/null'
+
+test_expect_success \
+ '... but having a loose copy allows for full recovery' \
+ 'mv ${pack}.idx tmp &&
+ git hash-object -t blob -w file_3 &&
+ mv tmp ${pack}.idx &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ '... and then a repack "clears" the corruption' \
+ 'do_repack --delta-base-offset --no-reuse-delta &&
+ git prune-packed &&
+ git verify-pack ${pack}.pack &&
+ git cat-file blob $blob_1 > /dev/null &&
+ git cat-file blob $blob_2 > /dev/null &&
+ git cat-file blob $blob_3 > /dev/null'
+
+test_expect_success \
+ 'corrupting header to have too small output buffer fails unpack' \
+ 'create_new_pack &&
+ git prune-packed &&
+ printf "\262\001" | do_corrupt_object $blob_1 0 &&
+ test_must_fail git cat-file blob $blob_1 > /dev/null &&
+ test_must_fail git cat-file blob $blob_2 > /dev/null &&
+ test_must_fail git cat-file blob $blob_3 > /dev/null'
+
+# \0 - empty base
+# \1 - one byte in result
+# \1 - one literal byte (X)
+test_expect_success \
+ 'apply good minimal delta' \
+ 'printf "\0\1\1X" > minimal_delta &&
+ test-tool delta -p /dev/null minimal_delta /dev/null'
+
+# \0 - empty base
+# \1 - 1 byte in result
+# \2 - two literal bytes (one too many)
+test_expect_success \
+ 'apply delta with too many literal bytes' \
+ 'printf "\0\1\2XX" > too_big_literal &&
+ test_must_fail test-tool delta -p /dev/null too_big_literal /dev/null'
+
+# \4 - four bytes in base
+# \1 - one byte in result
+# \221 - copy, one byte offset, one byte size
+# \0 - copy from offset 0
+# \2 - copy two bytes (one too many)
+test_expect_success \
+ 'apply delta with too many copied bytes' \
+ 'printf "\4\1\221\0\2" > too_big_copy &&
+ printf base >base &&
+ test_must_fail test-tool delta -p base too_big_copy /dev/null'
+
+# \0 - empty base
+# \2 - two bytes in result
+# \2 - two literal bytes (we are short one)
+test_expect_success \
+ 'apply delta with too few literal bytes' \
+ 'printf "\0\2\2X" > truncated_delta &&
+ test_must_fail test-tool delta -p /dev/null truncated_delta /dev/null'
+
+# \0 - empty base
+# \1 - one byte in result
+# \221 - copy, one byte offset, one byte size
+# \0 - copy from offset 0
+# \1 - copy one byte (we are short one)
+test_expect_success \
+ 'apply delta with too few bytes in base' \
+ 'printf "\0\1\221\0\1" > truncated_base &&
+ test_must_fail test-tool delta -p /dev/null truncated_base /dev/null'
+
+# \4 - four bytes in base
+# \2 - two bytes in result
+# \1 - one literal byte (X)
+# \221 - copy, one byte offset, one byte size
+# (offset/size missing)
+#
+# Note that the literal byte is necessary to get past the uninteresting minimum
+# delta size check.
+test_expect_success \
+ 'apply delta with truncated copy parameters' \
+ 'printf "\4\2\1X\221" > truncated_copy_delta &&
+ printf base >base &&
+ test_must_fail test-tool delta -p base truncated_copy_delta /dev/null'
+
+# \0 - empty base
+# \1 - one byte in result
+# \1 - one literal byte (X)
+# \1 - trailing garbage command
+test_expect_success \
+ 'apply delta with trailing garbage literal' \
+ 'printf "\0\1\1X\1" > tail_garbage_literal &&
+ test_must_fail test-tool delta -p /dev/null tail_garbage_literal /dev/null'
+
+# \4 - four bytes in base
+# \1 - one byte in result
+# \1 - one literal byte (X)
+# \221 - copy, one byte offset, one byte size
+# \0 - copy from offset 0
+# \1 - copy 1 byte
+test_expect_success \
+ 'apply delta with trailing garbage copy' \
+ 'printf "\4\1\1X\221\0\1" > tail_garbage_copy &&
+ printf base >base &&
+ test_must_fail test-tool delta -p /dev/null tail_garbage_copy /dev/null'
+
+# \0 - empty base
+# \1 - one byte in result
+# \1 - one literal byte (X)
+# \0 - bogus opcode
+test_expect_success \
+ 'apply delta with trailing garbage opcode' \
+ 'printf "\0\1\1X\0" > tail_garbage_opcode &&
+ test_must_fail test-tool delta -p /dev/null tail_garbage_opcode /dev/null'
+
+test_done