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{Boolean,Byte,Char,Double,Float,Int,Long,Short}s.concat() may throw {NegativeArraySize,ArrayIndexOutOfBounds}Exception #3303

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ineuwirth opened this issue Oct 20, 2018 · 4 comments · Fixed by #7377
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{Boolean,Byte,Char,Double,Float,Int,Long,Short}s.concat() may throw {NegativeArraySize,ArrayIndexOutOfBounds}Exception #3303

ineuwirth opened this issue Oct 20, 2018 · 4 comments · Fixed by #7377
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P3 package=primitives status=triaged type=api-docs Change/add API documentation

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@ineuwirth
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ineuwirth commented Oct 20, 2018 •
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The concat() method in the per-type primitive utility classes throws unexpected NegativeArraySizeException or ArrayIndexOutOfBoundsException if the input arrays contain too many elements.

NegativeArraySizeException is being thrown if there is an overflow ending up with a negative int. In this case, the result array cannot be constructed with this number.

ArrayIndexOutOfBoundsException is being thrown if there is an overflow ending up with a non-negative int. In this case, the result array will be shorter than expected and System.arraycopy() will throw AIOOBE.
ineuwirth pushed a commit to ineuwirth/guava that referenced this issue Oct 20, 2018
The concat() method in the per-type primitive utility classes throw…
2572c99 
… unexpected `NegativeArraySizeException` or `ArrayIndexOutOfBoundsException` if the input arrays contain too many elements.

Added test cases to demonstrate both overflow cases. Possible fix is provided.

In this commit only the module `guava` and only the utility class `Longs` is covered along with its unit tests.

See google#3303
@ineuwirth ineuwirth mentioned this issue Oct 20, 2018
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@ineuwirth
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Test cases to demonstrate the issue can be found in #3304.

I am happy to cover other classes and modules (android, gwt) as well if you think the test cases/provided fix are good.

ineuwirth pushed a commit to ineuwirth/guava that referenced this issue Oct 21, 2018
The concat() method in the per-type primitive utility classes throw…
7a59adf 
… unexpected `NegativeArraySizeException` or `ArrayIndexOutOfBoundsException` if the input arrays contain too many elements.

De-duplicate unit test code.

See google#3303
@raghsriniv raghsriniv added the P3 label Jun 24, 2019
@kluever kluever removed the P3 label Oct 28, 2019
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kluever commented Oct 28, 2019

This isn't actually a bug, right? It's just improving the API docs?

@kluever kluever added type=api-docs Change/add API documentation P3 labels Oct 28, 2019
@ineuwirth
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Well, a similar issue has been fixed in code instead of documenting the behavior e.g. in #3026.
Also, in case of an overflow ending up with a positive number, we could prevent a potentially big array from being allocated for nothing.

@copybara-service copybara-service bot mentioned this issue Jun 26, 2023
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copybara-service bot pushed a commit that referenced this issue Jun 26, 2023
Changed Longs.concat() to throw IllegalArgumentException if the i…
ecce137 
…nput arrays contain too many elements.

See #3303

Fixes #3304

RELNOTES=n/a
PiperOrigin-RevId: 543414513
copybara-service bot pushed a commit that referenced this issue Jun 26, 2023
Changed Longs.concat() to throw IllegalArgumentException if the i…
8720b6b 
…nput arrays contain too many elements.

See #3303

Fixes #3304

RELNOTES=n/a
PiperOrigin-RevId: 543451555
@perceptron8 perceptron8 mentioned this issue Aug 27, 2024
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copybara-service bot pushed a commit that referenced this issue Aug 27, 2024
Changed *.concat() to throw IllegalArgumentException if the input…
2538294 
… arrays contain too many elements.

Fixes #7376
Fixes #3303

This change comes from @perceptron8, who generalized the earlier PR by @ineuwirth.

RELNOTES=n/a
PiperOrigin-RevId: 667983976
@copybara-service copybara-service bot mentioned this issue Aug 27, 2024
Merged
copybara-service bot pushed a commit that referenced this issue Aug 27, 2024
Changed *.concat() to throw IllegalArgumentException if the input…
8bc8ea9 
… arrays contain too many elements.

Fixes #7376
Fixes #3303

This change comes from @perceptron8, who generalized the earlier PR by @ineuwirth.

RELNOTES=n/a
PiperOrigin-RevId: 667983976
@cpovirk
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cpovirk commented Aug 27, 2024

I think the PR from last year and the followup today have covered all this, but let me know if I'm missing anything.

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