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Fix RenameData data race (#19579)

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RenameData could start operating on inline data after timing out 
and the call returned due to WithDeadline.

This could cause a buffer to write to the inline data being written.

Since no writes are in `RenameData` and the call is canceled, 
this doesn't present a corruption issue. But a race is a race and 
should be fixed.

Copy inline data to a fresh buffer.
This commit is contained in:
Klaus Post 2024-04-22 22:07:19 -07:00 committed by GitHub
parent 95c65f4e8f
commit b5a09ff96b
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1 changed files with 8 additions and 1 deletions
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9
cmd/xl-storage-disk-id-check.go
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@ -32,6 +32,7 @@ import (
"github.com/minio/madmin-go/v3"
"github.com/minio/minio/internal/cachevalue"
"github.com/minio/minio/internal/grid"
xioutil "github.com/minio/minio/internal/ioutil"
"github.com/minio/minio/internal/logger"
)
@ -471,8 +472,14 @@ func (p *xlStorageDiskIDCheck) RenameData(ctx context.Context, srcVolume, srcPat
}
done(&err)
}()
// Copy inline data to a new buffer to function with deadlines.
if len(fi.Data) > 0 {
fi.Data = append(grid.GetByteBufferCap(len(fi.Data))[:0], fi.Data...)
}
return xioutil.WithDeadline[uint64](ctx, globalDriveConfig.GetMaxTimeout(), func(ctx context.Context) (result uint64, err error) {
if len(fi.Data) > 0 {
defer grid.PutByteBuffer(fi.Data)
}
return p.storage.RenameData(ctx, srcVolume, srcPath, fi, dstVolume, dstPath, opts)
})
}