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Check overflow in MutableArrayData extend offsets (#3123) #3157

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tustvold
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Which issue does this PR close?

Closes #3123

Rationale for this change

What changes are included in this PR?

Are there any user-facing changes?

@github-actions github-actions bot added the arrow Changes to the arrow crate label Nov 22, 2022
@@ -36,7 +36,7 @@ pub(super) fn extend_offsets<T: ArrowNativeType + Integer>(
offsets.windows(2).for_each(|offsets| {
// compute the new offset
let length = offsets[1] - offsets[0];
last_offset = last_offset + length;
last_offset = last_offset.checked_add(&length).expect("offset overflow");
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Extend is infallible, so we can't return an Error. We also fairly consistently panic on offset overflow in other kernels, and I wish to eventually remove MutableArrayData, and so I think this is fine for now

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I think panic'ing rather than segfaulting is a much better practice

@tustvold tustvold force-pushed the check-overflow-in-mutable-array-data-extend branch from ab6e4da to f808ca9 Compare November 22, 2022 10:05
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Thank you @tustvold

I also verified that this change changes a segfault we were seeing in our internal system into a panic which is much better

Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>
@tustvold tustvold merged commit f091cbb into apache:master Nov 22, 2022
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ursabot commented Nov 22, 2022

Benchmark runs are scheduled for baseline = e214ccc and contender = f091cbb. f091cbb is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java

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arithmatic overflow leads to segfault in concat_batches
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