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zstd: Fix back-referenced offset #793

Merged
merged 1 commit into from
Mar 26, 2023
Merged

zstd: Fix back-referenced offset #793

merged 1 commit into from
Mar 26, 2023

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klauspost
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Since we expand backwards early, we may be in a situation where best.s+2 has already been indexed.

This will result in picking up a 0 or negative offset, which leads to corrupted data.

Skip this check if best.s is less than or equal to s-2.

Regression from #784 (not released)

Since we expand backwards early, we may be in a situation where best.s+2 has already been indexed.

This will result in picking up a 0 or negative offset, which leads to corrupted data.

Skip this check if best.s is less than or equal to s-2.

Regression from #784 (not released)
@klauspost klauspost merged commit 2a02ad2 into master Mar 26, 2023
@klauspost klauspost deleted the zstd-fix-backref branch March 26, 2023 08:05
@klauspost
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klauspost commented Mar 26, 2023

Caught 15 minutes after this PR was opened on https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=57460

kodiakhq bot referenced this pull request in cloudquery/filetypes May 1, 2023
This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [github.com/klauspost/compress](https://togithub.com/klauspost/compress) | indirect | patch | `v1.16.3` -> `v1.16.5` |

---

### Release Notes

<details>
<summary>klauspost/compress</summary>

### [`v1.16.5`](https://togithub.com/klauspost/compress/releases/tag/v1.16.5)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.4...v1.16.5)

#### What's Changed

-   zstd: readByte needs to use io.ReadFull by [@&#8203;jnoxon](https://togithub.com/jnoxon) in [https://github.com/klauspost/compress/pull/802](https://togithub.com/klauspost/compress/pull/802)
-   gzip: Fix WriterTo after initial read by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/804](https://togithub.com/klauspost/compress/pull/804)

#### New Contributors

-   [@&#8203;jnoxon](https://togithub.com/jnoxon) made their first contribution in [https://github.com/klauspost/compress/pull/802](https://togithub.com/klauspost/compress/pull/802)

**Full Changelog**: klauspost/compress@v1.16.4...v1.16.5

### [`v1.16.4`](https://togithub.com/klauspost/compress/releases/tag/v1.16.4)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.3...v1.16.4)

#### What's Changed

-   s2: Fix huge block overflow by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/779](https://togithub.com/klauspost/compress/pull/779)
-   s2: Allow CustomEncoder fallback by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/780](https://togithub.com/klauspost/compress/pull/780)
-   zstd: Fix amd64 not always detecting corrupt data by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/785](https://togithub.com/klauspost/compress/pull/785)
-   zstd: Improve zstd best efficiency by [@&#8203;klauspost](https://togithub.com/klauspost) and [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/784](https://togithub.com/klauspost/compress/pull/784)
-   zstd: Make load(32|64)32 safer and smaller by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/788](https://togithub.com/klauspost/compress/pull/788)
-   zstd: Fix quick reject on long backmatches by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/787](https://togithub.com/klauspost/compress/pull/787)
-   zstd: Revert table size change  by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/789](https://togithub.com/klauspost/compress/pull/789)
-   zstd: Respect WithAllLitEntropyCompression by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/792](https://togithub.com/klauspost/compress/pull/792)
-   zstd: Fix back-referenced offset by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/793](https://togithub.com/klauspost/compress/pull/793)
-   zstd: Load source value at start of loop by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/794](https://togithub.com/klauspost/compress/pull/794)
-   zstd: Shorten checksum code by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/795](https://togithub.com/klauspost/compress/pull/795)
-   zstd: Fix fallback on incompressible block by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/798](https://togithub.com/klauspost/compress/pull/798)
-   gzhttp: Suppport ResponseWriter Unwrap() in gzhttp handler by [@&#8203;jgimenez](https://togithub.com/jgimenez) in [https://github.com/klauspost/compress/pull/799](https://togithub.com/klauspost/compress/pull/799)

#### New Contributors

-   [@&#8203;jgimenez](https://togithub.com/jgimenez) made their first contribution in [https://github.com/klauspost/compress/pull/799](https://togithub.com/klauspost/compress/pull/799)

**Full Changelog**: klauspost/compress@v1.16.3...v1.16.4

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "before 3am on the first day of the month" (UTC), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

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---

This PR has been generated by [Renovate Bot](https://togithub.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNS42Ni4zIiwidXBkYXRlZEluVmVyIjoiMzUuNjYuMyIsInRhcmdldEJyYW5jaCI6Im1haW4ifQ==-->
kodiakhq bot referenced this pull request in cloudquery/plugin-sdk Jul 1, 2023
)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [github.com/klauspost/compress](https://togithub.com/klauspost/compress) | indirect | patch | `v1.16.0` -> `v1.16.6` |

---

### Release Notes

<details>
<summary>klauspost/compress (github.com/klauspost/compress)</summary>

### [`v1.16.6`](https://togithub.com/klauspost/compress/releases/tag/v1.16.6)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.5...v1.16.6)

#### What's Changed

-   zstd: correctly ignore WithEncoderPadding(1) by [@&#8203;ianlancetaylor](https://togithub.com/ianlancetaylor) in [https://github.com/klauspost/compress/pull/806](https://togithub.com/klauspost/compress/pull/806)
-   gzhttp: Handle informational headers by [@&#8203;rtribotte](https://togithub.com/rtribotte) in [https://github.com/klauspost/compress/pull/815](https://togithub.com/klauspost/compress/pull/815)
-   zstd: Add amd64 match length assembly by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/824](https://togithub.com/klauspost/compress/pull/824)
-   s2: Improve Better compression slightly by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/663](https://togithub.com/klauspost/compress/pull/663)
-   s2: Clean up matchlen assembly by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/825](https://togithub.com/klauspost/compress/pull/825)

#### New Contributors

-   [@&#8203;rtribotte](https://togithub.com/rtribotte) made their first contribution in [https://github.com/klauspost/compress/pull/815](https://togithub.com/klauspost/compress/pull/815)
-   [@&#8203;dveeden](https://togithub.com/dveeden) made their first contribution in [https://github.com/klauspost/compress/pull/816](https://togithub.com/klauspost/compress/pull/816)

**Full Changelog**: klauspost/compress@v1.16.5...v1.16.6

### [`v1.16.5`](https://togithub.com/klauspost/compress/releases/tag/v1.16.5)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.4...v1.16.5)

#### What's Changed

-   zstd: readByte needs to use io.ReadFull by [@&#8203;jnoxon](https://togithub.com/jnoxon) in [https://github.com/klauspost/compress/pull/802](https://togithub.com/klauspost/compress/pull/802)
-   gzip: Fix WriterTo after initial read by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/804](https://togithub.com/klauspost/compress/pull/804)

#### New Contributors

-   [@&#8203;jnoxon](https://togithub.com/jnoxon) made their first contribution in [https://github.com/klauspost/compress/pull/802](https://togithub.com/klauspost/compress/pull/802)

**Full Changelog**: klauspost/compress@v1.16.4...v1.16.5

### [`v1.16.4`](https://togithub.com/klauspost/compress/releases/tag/v1.16.4)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.3...v1.16.4)

#### What's Changed

-   s2: Fix huge block overflow by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/779](https://togithub.com/klauspost/compress/pull/779)
-   s2: Allow CustomEncoder fallback by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/780](https://togithub.com/klauspost/compress/pull/780)
-   zstd: Fix amd64 not always detecting corrupt data by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/785](https://togithub.com/klauspost/compress/pull/785)
-   zstd: Improve zstd best efficiency by [@&#8203;klauspost](https://togithub.com/klauspost) and [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/784](https://togithub.com/klauspost/compress/pull/784)
-   zstd: Make load(32|64)32 safer and smaller by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/788](https://togithub.com/klauspost/compress/pull/788)
-   zstd: Fix quick reject on long backmatches by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/787](https://togithub.com/klauspost/compress/pull/787)
-   zstd: Revert table size change  by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/789](https://togithub.com/klauspost/compress/pull/789)
-   zstd: Respect WithAllLitEntropyCompression by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/792](https://togithub.com/klauspost/compress/pull/792)
-   zstd: Fix back-referenced offset by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/793](https://togithub.com/klauspost/compress/pull/793)
-   zstd: Load source value at start of loop by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/794](https://togithub.com/klauspost/compress/pull/794)
-   zstd: Shorten checksum code by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/795](https://togithub.com/klauspost/compress/pull/795)
-   zstd: Fix fallback on incompressible block by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/798](https://togithub.com/klauspost/compress/pull/798)
-   gzhttp: Suppport ResponseWriter Unwrap() in gzhttp handler by [@&#8203;jgimenez](https://togithub.com/jgimenez) in [https://github.com/klauspost/compress/pull/799](https://togithub.com/klauspost/compress/pull/799)

#### New Contributors

-   [@&#8203;jgimenez](https://togithub.com/jgimenez) made their first contribution in [https://github.com/klauspost/compress/pull/799](https://togithub.com/klauspost/compress/pull/799)

**Full Changelog**: klauspost/compress@v1.16.3...v1.16.4

### [`v1.16.3`](https://togithub.com/klauspost/compress/releases/tag/v1.16.3)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.2...v1.16.3)

**Full Changelog**: klauspost/compress@v1.16.2...v1.16.3

### [`v1.16.2`](https://togithub.com/klauspost/compress/releases/tag/v1.16.2)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.1...v1.16.2)

#### What's Changed

-   Fix Goreleaser permissions by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/777](https://togithub.com/klauspost/compress/pull/777)

**Full Changelog**: klauspost/compress@v1.16.1...v1.16.2

### [`v1.16.1`](https://togithub.com/klauspost/compress/releases/tag/v1.16.1)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.0...v1.16.1)

#### What's Changed

-   zstd: Speed up + improve best encoder by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/776](https://togithub.com/klauspost/compress/pull/776)
-   s2: Add Intel LZ4s converter by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/766](https://togithub.com/klauspost/compress/pull/766)
-   gzhttp: Add BREACH mitigation by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/762](https://togithub.com/klauspost/compress/pull/762)
-   gzhttp: Remove a few unneeded allocs by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/768](https://togithub.com/klauspost/compress/pull/768)
-   gzhttp: Fix crypto/rand.Read usage by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/770](https://togithub.com/klauspost/compress/pull/770)
-   gzhttp: Use SHA256 as paranoid option by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/769](https://togithub.com/klauspost/compress/pull/769)
-   gzhttp: Use strings for randomJitter to skip a copy by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/767](https://togithub.com/klauspost/compress/pull/767)
-   zstd: Fix ineffective block size check by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/771](https://togithub.com/klauspost/compress/pull/771)
-   zstd: Check FSE init values by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/772](https://togithub.com/klauspost/compress/pull/772)
-   zstd: Report EOF from byteBuf.readBig by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/773](https://togithub.com/klauspost/compress/pull/773)
-   huff0: Speed up compress1xDo by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/774](https://togithub.com/klauspost/compress/pull/774)
-   tests: Remove fuzz printing by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/775](https://togithub.com/klauspost/compress/pull/775)
-   tests: Add CICD Fuzz testing by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/763](https://togithub.com/klauspost/compress/pull/763)
-   ci: set minimal permissions to GitHub Workflows by [@&#8203;diogoteles08](https://togithub.com/diogoteles08) in [https://github.com/klauspost/compress/pull/765](https://togithub.com/klauspost/compress/pull/765)

#### New Contributors

-   [@&#8203;diogoteles08](https://togithub.com/diogoteles08) made their first contribution in [https://github.com/klauspost/compress/pull/765](https://togithub.com/klauspost/compress/pull/765)

**Full Changelog**: klauspost/compress@v1.16.0...v1.16.1

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "before 4am on the first day of the month" (UTC), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Renovate Bot](https://togithub.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNS4xNTEuMCIsInVwZGF0ZWRJblZlciI6IjM1LjE1MS4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiJ9-->
kodiakhq bot referenced this pull request in cloudquery/plugin-pb-go Aug 1, 2023
This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [github.com/klauspost/compress](https://togithub.com/klauspost/compress) | indirect | minor | `v1.15.15` -> `v1.16.7` |

---

### Release Notes

<details>
<summary>klauspost/compress (github.com/klauspost/compress)</summary>

### [`v1.16.7`](https://togithub.com/klauspost/compress/releases/tag/v1.16.7)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.6...v1.16.7)

#### What's Changed

-   zstd: Fix default level first dictionary encode by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/829](https://togithub.com/klauspost/compress/pull/829)
-   docs: Fix typo in security advisory URL by [@&#8203;vcabbage](https://togithub.com/vcabbage) in [https://github.com/klauspost/compress/pull/830](https://togithub.com/klauspost/compress/pull/830)
-   s2: add GetBufferCapacity() method by [@&#8203;GiedriusS](https://togithub.com/GiedriusS) in [https://github.com/klauspost/compress/pull/832](https://togithub.com/klauspost/compress/pull/832)

#### New Contributors

-   [@&#8203;vcabbage](https://togithub.com/vcabbage) made their first contribution in [https://github.com/klauspost/compress/pull/830](https://togithub.com/klauspost/compress/pull/830)
-   [@&#8203;GiedriusS](https://togithub.com/GiedriusS) made their first contribution in [https://github.com/klauspost/compress/pull/832](https://togithub.com/klauspost/compress/pull/832)

**Full Changelog**: klauspost/compress@v1.16.6...v1.16.7

### [`v1.16.6`](https://togithub.com/klauspost/compress/releases/tag/v1.16.6)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.5...v1.16.6)

#### What's Changed

-   zstd: correctly ignore WithEncoderPadding(1) by [@&#8203;ianlancetaylor](https://togithub.com/ianlancetaylor) in [https://github.com/klauspost/compress/pull/806](https://togithub.com/klauspost/compress/pull/806)
-   gzhttp: Handle informational headers by [@&#8203;rtribotte](https://togithub.com/rtribotte) in [https://github.com/klauspost/compress/pull/815](https://togithub.com/klauspost/compress/pull/815)
-   zstd: Add amd64 match length assembly by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/824](https://togithub.com/klauspost/compress/pull/824)
-   s2: Improve Better compression slightly by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/663](https://togithub.com/klauspost/compress/pull/663)
-   s2: Clean up matchlen assembly by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/825](https://togithub.com/klauspost/compress/pull/825)

#### New Contributors

-   [@&#8203;rtribotte](https://togithub.com/rtribotte) made their first contribution in [https://github.com/klauspost/compress/pull/815](https://togithub.com/klauspost/compress/pull/815)
-   [@&#8203;dveeden](https://togithub.com/dveeden) made their first contribution in [https://github.com/klauspost/compress/pull/816](https://togithub.com/klauspost/compress/pull/816)

**Full Changelog**: klauspost/compress@v1.16.5...v1.16.6

### [`v1.16.5`](https://togithub.com/klauspost/compress/releases/tag/v1.16.5)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.4...v1.16.5)

#### What's Changed

-   zstd: readByte needs to use io.ReadFull by [@&#8203;jnoxon](https://togithub.com/jnoxon) in [https://github.com/klauspost/compress/pull/802](https://togithub.com/klauspost/compress/pull/802)
-   gzip: Fix WriterTo after initial read by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/804](https://togithub.com/klauspost/compress/pull/804)

#### New Contributors

-   [@&#8203;jnoxon](https://togithub.com/jnoxon) made their first contribution in [https://github.com/klauspost/compress/pull/802](https://togithub.com/klauspost/compress/pull/802)

**Full Changelog**: klauspost/compress@v1.16.4...v1.16.5

### [`v1.16.4`](https://togithub.com/klauspost/compress/releases/tag/v1.16.4)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.3...v1.16.4)

#### What's Changed

-   s2: Fix huge block overflow by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/779](https://togithub.com/klauspost/compress/pull/779)
-   s2: Allow CustomEncoder fallback by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/780](https://togithub.com/klauspost/compress/pull/780)
-   zstd: Fix amd64 not always detecting corrupt data by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/785](https://togithub.com/klauspost/compress/pull/785)
-   zstd: Improve zstd best efficiency by [@&#8203;klauspost](https://togithub.com/klauspost) and [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/784](https://togithub.com/klauspost/compress/pull/784)
-   zstd: Make load(32|64)32 safer and smaller by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/788](https://togithub.com/klauspost/compress/pull/788)
-   zstd: Fix quick reject on long backmatches by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/787](https://togithub.com/klauspost/compress/pull/787)
-   zstd: Revert table size change  by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/789](https://togithub.com/klauspost/compress/pull/789)
-   zstd: Respect WithAllLitEntropyCompression by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/792](https://togithub.com/klauspost/compress/pull/792)
-   zstd: Fix back-referenced offset by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/793](https://togithub.com/klauspost/compress/pull/793)
-   zstd: Load source value at start of loop by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/794](https://togithub.com/klauspost/compress/pull/794)
-   zstd: Shorten checksum code by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/795](https://togithub.com/klauspost/compress/pull/795)
-   zstd: Fix fallback on incompressible block by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/798](https://togithub.com/klauspost/compress/pull/798)
-   gzhttp: Suppport ResponseWriter Unwrap() in gzhttp handler by [@&#8203;jgimenez](https://togithub.com/jgimenez) in [https://github.com/klauspost/compress/pull/799](https://togithub.com/klauspost/compress/pull/799)

#### New Contributors

-   [@&#8203;jgimenez](https://togithub.com/jgimenez) made their first contribution in [https://github.com/klauspost/compress/pull/799](https://togithub.com/klauspost/compress/pull/799)

**Full Changelog**: klauspost/compress@v1.16.3...v1.16.4

### [`v1.16.3`](https://togithub.com/klauspost/compress/releases/tag/v1.16.3)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.2...v1.16.3)

**Full Changelog**: klauspost/compress@v1.16.2...v1.16.3

### [`v1.16.2`](https://togithub.com/klauspost/compress/releases/tag/v1.16.2)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.1...v1.16.2)

#### What's Changed

-   Fix Goreleaser permissions by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/777](https://togithub.com/klauspost/compress/pull/777)

**Full Changelog**: klauspost/compress@v1.16.1...v1.16.2

### [`v1.16.1`](https://togithub.com/klauspost/compress/releases/tag/v1.16.1)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.16.0...v1.16.1)

#### What's Changed

-   zstd: Speed up + improve best encoder by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/776](https://togithub.com/klauspost/compress/pull/776)
-   s2: Add Intel LZ4s converter by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/766](https://togithub.com/klauspost/compress/pull/766)
-   gzhttp: Add BREACH mitigation by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/762](https://togithub.com/klauspost/compress/pull/762)
-   gzhttp: Remove a few unneeded allocs by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/768](https://togithub.com/klauspost/compress/pull/768)
-   gzhttp: Fix crypto/rand.Read usage by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/770](https://togithub.com/klauspost/compress/pull/770)
-   gzhttp: Use SHA256 as paranoid option by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/769](https://togithub.com/klauspost/compress/pull/769)
-   gzhttp: Use strings for randomJitter to skip a copy by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/767](https://togithub.com/klauspost/compress/pull/767)
-   zstd: Fix ineffective block size check by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/771](https://togithub.com/klauspost/compress/pull/771)
-   zstd: Check FSE init values by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/772](https://togithub.com/klauspost/compress/pull/772)
-   zstd: Report EOF from byteBuf.readBig by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/773](https://togithub.com/klauspost/compress/pull/773)
-   huff0: Speed up compress1xDo by [@&#8203;greatroar](https://togithub.com/greatroar) in [https://github.com/klauspost/compress/pull/774](https://togithub.com/klauspost/compress/pull/774)
-   tests: Remove fuzz printing by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/775](https://togithub.com/klauspost/compress/pull/775)
-   tests: Add CICD Fuzz testing by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/763](https://togithub.com/klauspost/compress/pull/763)
-   ci: set minimal permissions to GitHub Workflows by [@&#8203;diogoteles08](https://togithub.com/diogoteles08) in [https://github.com/klauspost/compress/pull/765](https://togithub.com/klauspost/compress/pull/765)

#### New Contributors

-   [@&#8203;diogoteles08](https://togithub.com/diogoteles08) made their first contribution in [https://github.com/klauspost/compress/pull/765](https://togithub.com/klauspost/compress/pull/765)

**Full Changelog**: klauspost/compress@v1.16.0...v1.16.1

### [`v1.16.0`](https://togithub.com/klauspost/compress/releases/tag/v1.16.0)

[Compare Source](https://togithub.com/klauspost/compress/compare/v1.15.15...v1.16.0)

#### What's Changed

-   s2: Add Dictionary support by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/685](https://togithub.com/klauspost/compress/pull/685)
-   s2: Add Compression Size Estimate by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/752](https://togithub.com/klauspost/compress/pull/752)
-   s2: Add support for custom stream encoder by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/755](https://togithub.com/klauspost/compress/pull/755)
-   s2: Add LZ4 block converter by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/748](https://togithub.com/klauspost/compress/pull/748)
-   s2: Support io.ReaderAt in ReadSeeker by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/747](https://togithub.com/klauspost/compress/pull/747)
-   s2c/s2sx: Use concurrent decoding by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/746](https://togithub.com/klauspost/compress/pull/746)
-   tests: Upgrade to Go 1.20 by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/749](https://togithub.com/klauspost/compress/pull/749)
-   Update all (command) dependencies by [@&#8203;klauspost](https://togithub.com/klauspost) in [https://github.com/klauspost/compress/pull/758](https://togithub.com/klauspost/compress/pull/758)

**Full Changelog**: klauspost/compress@v1.15.15...v1.16.0

</details>

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klauspost added a commit that referenced this pull request Oct 22, 2023
Regression from #784 and followup #793

Fixes #875

A 0 offset backreference was possible when "improve" was successful twice in a row in the "skipBeginning" part, only finding 2 (previously unmatches) length 4 matches, but where start offset decreased by 2 in both cases.

This would result in output where the end offset would equal to the next 's', thereby doing a self-reference.

Add a general check in "improve" and just reject these. Will also guard against similar issues in the future.

This also hints at some potentially suboptimal hash indexing - but I will take that improvement separately.

Fuzz test set updated.
klauspost added a commit that referenced this pull request Oct 22, 2023
* zstd: Fix corrupted output in "best"

Regression from #784 and followup #793

Fixes #875

A 0 offset backreference was possible when "improve" was successful twice in a row in the "skipBeginning" part, only finding 2 (previously unmatches) length 4 matches, but where start offset decreased by 2 in both cases.

This would result in output where the end offset would equal to the next 's', thereby doing a self-reference.

Add a general check in "improve" and just reject these. Will also guard against similar issues in the future.

This also hints at some potentially suboptimal hash indexing - but I will take that improvement separately.

Fuzz test set updated.
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