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Hash : 8c773438
Author :
Date : 2019-02-15T10:15:39
refdb_fs: fix potential race with ref repacking in `exists` callback When repacking references, git.git will first update the packed refs and only afterwards delete any existing loose references that have now been moved to the new packed refs file. Due to this, there is a potential for racing if one first reads the packfile (which has not been updated yet) and only then trying to read the loose reference (which has just been deleted). In this case, one will incorrectly fail to lookup the reference and it will be reported as missing. Naturally, this is exactly what we've been doing in `refdb_fs_backend__exists`. Fix the race by reversing the lookup: we will now first check if the loose reference exists and only afterwards refresh the packed file.
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Files
- CMakeLists.txt
- alloc.c
- alloc.h
- annotated_commit.c
- annotated_commit.h
- apply.c
- apply.h
- array.h
- attr.c
- attr.h
- attr_file.c
- attr_file.h
- attrcache.c
- attrcache.h
- bitvec.h
- blame.c
- blame.h
- blame_git.c
- blame_git.h
- blob.c
- blob.h
- branch.c
- branch.h
- buf_text.c
- buf_text.h
- buffer.c
- buffer.h
- cache.c
- cache.h
- cc-compat.h
- checkout.c
- checkout.h
- cherrypick.c
- clone.c
- clone.h
- commit.c
- commit.h
- commit_list.c
- commit_list.h
- common.h
- config.c
- config.h
- config_backend.h
- config_cache.c
- config_entries.c
- config_entries.h
- config_file.c
- config_mem.c
- config_parse.c
- config_parse.h
- crlf.c
- date.c
- delta.c
- delta.h
- describe.c
- diff.c
- diff.h
- diff_driver.c
- diff_driver.h
- diff_file.c
- diff_file.h
- diff_generate.c
- diff_generate.h
- diff_parse.c
- diff_parse.h
- diff_print.c
- diff_stats.c
- diff_tform.c
- diff_tform.h
- diff_xdiff.c
- diff_xdiff.h
- errors.c
- features.h.in
- fetch.c
- fetch.h
- fetchhead.c
- fetchhead.h
- filebuf.c
- filebuf.h
- fileops.c
- fileops.h
- filter.c
- filter.h
- fnmatch.c
- fnmatch.h
- global.c
- global.h
- graph.c
- hash.c
- hash.h
- hash/
- hashsig.c
- ident.c
- idxmap.c
- idxmap.h
- ignore.c
- ignore.h
- index.c
- index.h
- indexer.c
- indexer.h
- integer.h
- iterator.c
- iterator.h
- khash.h
- mailmap.c
- mailmap.h
- map.h
- merge.c
- merge.h
- merge_driver.c
- merge_driver.h
- merge_file.c
- message.c
- message.h
- mwindow.c
- mwindow.h
- netops.c
- netops.h
- notes.c
- notes.h
- object.c
- object.h
- object_api.c
- odb.c
- odb.h
- odb_loose.c
- odb_mempack.c
- odb_pack.c
- offmap.c
- offmap.h
- oid.c
- oid.h
- oidarray.c
- oidarray.h
- oidmap.c
- oidmap.h
- pack-objects.c
- pack-objects.h
- pack.c
- pack.h
- parse.c
- parse.h
- patch.c
- patch.h
- patch_generate.c
- patch_generate.h
- patch_parse.c
- patch_parse.h
- path.c
- path.h
- pathspec.c
- pathspec.h
- pool.c
- pool.h
- posix.c
- posix.h
- pqueue.c
- pqueue.h
- proxy.c
- proxy.h
- push.c
- push.h
- reader.c
- reader.h
- rebase.c
- refdb.c
- refdb.h
- refdb_fs.c
- refdb_fs.h
- reflog.c
- reflog.h
- refs.c
- refs.h
- refspec.c
- refspec.h
- remote.c
- remote.h
- repo_template.h
- repository.c
- repository.h
- reset.c
- revert.c
- revparse.c
- revwalk.c
- revwalk.h
- settings.c
- sha1_lookup.c
- sha1_lookup.h
- signature.c
- signature.h
- sortedcache.c
- sortedcache.h
- stash.c
- status.c
- status.h
- stdalloc.c
- stdalloc.h
- stream.h
- streams/
- strmap.c
- strmap.h
- strnlen.h
- submodule.c
- submodule.h
- sysdir.c
- sysdir.h
- tag.c
- tag.h
- thread-utils.c
- thread-utils.h
- trace.c
- trace.h
- trailer.c
- transaction.c
- transaction.h
- transport.c
- transports/
- tree-cache.c
- tree-cache.h
- tree.c
- tree.h
- tsort.c
- unix/
- userdiff.h
- util.c
- util.h
- varint.c
- varint.h
- vector.c
- vector.h
- win32/
- worktree.c
- worktree.h
- xdiff/
- zstream.c
- zstream.h
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