diff options
| -rw-r--r-- | sha1_file.c | 11 | ||||
| -rwxr-xr-x | t/t5303-pack-corruption-resilience.sh | 27 |
2 files changed, 37 insertions, 1 deletions
diff --git a/sha1_file.c b/sha1_file.c index b114cc922..742cf342c 100644 --- a/sha1_file.c +++ b/sha1_file.c @@ -2135,8 +2135,17 @@ void *unpack_entry(struct packed_git *p, off_t obj_offset, data = patch_delta(base, base_size, delta_data, delta_size, &size); + + /* + * We could not apply the delta; warn the user, but keep going. + * Our failure will be noticed either in the next iteration of + * the loop, or if this is the final delta, in the caller when + * we return NULL. Those code paths will take care of making + * a more explicit warning and retrying with another copy of + * the object. + */ if (!data) - die("failed to apply delta"); + error("failed to apply delta"); free(delta_data); } diff --git a/t/t5303-pack-corruption-resilience.sh b/t/t5303-pack-corruption-resilience.sh index 9cb8172ad..35926debe 100755 --- a/t/t5303-pack-corruption-resilience.sh +++ b/t/t5303-pack-corruption-resilience.sh @@ -276,6 +276,33 @@ test_expect_success \ 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 && |