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| author | Ed Bardsley <ewb@uber.com> | 2019-06-03 21:48:08 -0700 |
|---|---|---|
| committer | Ed Bardsley <ewb@uber.com> | 2019-06-03 21:59:19 -0700 |
| commit | ec647e9f02339a93c2856cc93b6b1b6090a36c06 (patch) | |
| tree | 7dc31884db392754f7bf52c027e06434e7962ab5 /utils/merkletrie/internal | |
| parent | 37b80726760d2e0b17dfa437f3162dd930590ecf (diff) | |
| download | go-git-ec647e9f02339a93c2856cc93b6b1b6090a36c06.tar.gz | |
plumbing: format/packfile, Fix data race and resource leak.
Two problems are fixed:
- Buffers are not returned to the pool in the case of errors.
- Per https://golang.org/pkg/bytes/#Buffer.Bytes, the slice returned
from bytes.Buffer.Bytes() is only valid until the next modification
of the buffer, so it must be copied before the buffer is returned to the pool.
Running `go test -race` detected the following:
```
==================
WARNING: DATA RACE
Write at 0x00c000224020 by goroutine 15:
bytes.(*Buffer).WriteByte()
/usr/local/Cellar/go/1.11.5/libexec/src/bytes/buffer.go:271 +0xc8
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.diffDelta()
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile/diff_delta.go:95 +0x505
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.getDelta()
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile/diff_delta.go:60 +0x4ae
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.(*deltaSelector).tryToDeltify()
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile/delta_selector.go:309 +0x398
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.(*deltaSelector).walk()
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile/delta_selector.go:262 +0x33b
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.(*deltaSelector).ObjectsToPack.func1()
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile/delta_selector.go:70 +0x6a
Previous read at 0x00c000224020 by goroutine 8:
runtime.slicecopy()
/usr/local/Cellar/go/1.11.5/libexec/src/runtime/slice.go:221 +0x0
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.getDelta()
vendor/gopkg.in/src-d/go-git.v4/plumbing/memory.go:53 +0x5e2
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.(*deltaSelector).tryToDeltify()
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile/delta_selector.go:309 +0x398
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.(*deltaSelector).walk()
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile/delta_selector.go:262 +0x33b
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.(*deltaSelector).ObjectsToPack.func1()
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile/delta_selector.go:70 +0x6a
Goroutine 15 (running) created at:
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.(*deltaSelector).ObjectsToPack()
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile/delta_selector.go:69 +0x761
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.(*Encoder).Encode()
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile/encoder.go:52 +0xb1
vendor/gopkg.in/src-d/go-git%2ev4.pushHashes.func1()
vendor/gopkg.in/src-d/go-git.v4/remote.go:1026 +0x102
Goroutine 8 (finished) created at:
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.(*deltaSelector).ObjectsToPack()
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile/delta_selector.go:69 +0x761
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile.(*Encoder).Encode()
vendor/gopkg.in/src-d/go-git.v4/plumbing/format/packfile/encoder.go:52 +0xb1
vendor/gopkg.in/src-d/go-git%2ev4.pushHashes.func1()
vendor/gopkg.in/src-d/go-git.v4/remote.go:1026 +0x102
==================
```
Signed-off-by: Ed Bardsley <ewb@uber.com>
Diffstat (limited to 'utils/merkletrie/internal')
0 files changed, 0 insertions, 0 deletions