go/src/compress
Klaus Post 777e455106 [release-branch.go1.15] compress/flate: fix corrupted output
The fastest compression mode can pick up a false match for every 2GB
of input data resulting in incorrectly decompressed data.

Since matches are allowed to be up to and including at maxMatchOffset
we must offset the buffer by an additional element to prevent the first
4 bytes to match after an out-of-reach value after shiftOffsets has
been called.

We offset by `maxMatchOffset + 1` so offset 0 in the table will now
fail the `if offset > maxMatchOffset` in all cases.

Updates #41420.
Fixes #41463.

Change-Id: If1fbe01728e132b8a207e3f3f439edd832dcc710
GitHub-Last-Rev: 50fabab0da
GitHub-Pull-Request: golang/go#41477
Reviewed-on: https://go-review.googlesource.com/c/go/+/255879
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Joe Tsai <thebrokentoaster@gmail.com>
Trust: Matthew Dempsky <mdempsky@google.com>
(cherry picked from commit ab541a0560)
Reviewed-on: https://go-review.googlesource.com/c/go/+/266177
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
2020-10-29 18:54:36 +00:00
..
bzip2
flate [release-branch.go1.15] compress/flate: fix corrupted output 2020-10-29 18:54:36 +00:00
gzip all: base64-encode binaries that will cause Apple notarization to fail 2019-11-21 14:55:12 +00:00
lzw compress/lzw: clarify code invariants 2019-09-14 02:23:31 +00:00
testdata
zlib all: fix a bunch of misspellings 2018-10-06 15:40:03 +00:00