[1.3] bucket.Put: copy key before seek #639
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fuweid
commented
Dec 13, 2023
| @@ -288,18 +288,23 @@ func (b *Bucket) Put(key []byte, value []byte) error { | |||
| return ErrValueTooLarge | |||
| } | |||
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| // Insert into node. | |||
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It's related to #550.
If it's not accepted, I can use key here. Or I can cherry-pick 550 first.
As per `go build -gcflags -m ./... 2>&1`: Old behaviour: ``` ./bucket.go:148:31: leaking param: key ./bucket.go:192:42: leaking param: key ./bucket.go:271:22: leaking param: key ``` Now: ``` ./bucket.go:148:31: key does not escape ./bucket.go:192:42: key does not escape ./bucket.go:271:22: key does not escape ``` Signed-off-by: Evgenii Stratonikov <[email protected]> (cherry picked from commit 71a59ca) Signed-off-by: Wei Fu <[email protected]>
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ahrtr
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Dec 14, 2023
bucket.go
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| c.node().put(key, key, value, 0, bucketLeafFlag) | ||
| // Tip: Use a new variable `newKey` instead of reusing the existing `key` to prevent | ||
| // it from being marked as leaking, and accordingly cannot be allocated on stack. | ||
| newKey := cloneBytes(key) |
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I think we should clone the key before seek (line 167). Please update the main branch firstly. Thanks.
Signed-off-by: Wei Fu <[email protected]> (cherry picked from commit 324df9c) Signed-off-by: Wei Fu <[email protected]>
Signed-off-by: Wei Fu <[email protected]> (cherry picked from commit 1b08078) Signed-off-by: Wei Fu <[email protected]>
Application might change key value after seeking and before real put. This unexpected behaviour could corrupt database. When users file issue, maintainers doesn't know application behaviour. It could be caused by data race. This patch is to prevent such case and save maintainers' time. Signed-off-by: Wei Fu <[email protected]> (cherry picked from commit a05ec68) Signed-off-by: Wei Fu <[email protected]>
It's follow-up of etcd-io#637. Signed-off-by: Wei Fu <[email protected]> (cherry picked from commit 62d8026) Signed-off-by: Wei Fu <[email protected]>
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cherry-pick: