Hello bugproxy, or anyone else affected, Accepted zlib into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/zlib/1:1.2.11.dfsg- 2ubuntu1.2 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed- focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification- failed-focal. In either case, without details of your testing we will not be able to proceed. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping! N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days. ** Changed in: zlib (Ubuntu Focal) Status: In Progress => Fix Committed ** Tags added: verification-needed verification-needed-focal -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to zlib in Ubuntu. https://bugs.launchpad.net/bugs/1899621 Title: [Ubuntu 20.04] zlib: inflateSyncPoint() returns an incorrect result on z15 Status in Ubuntu on IBM z Systems: In Progress Status in zlib package in Ubuntu: Fix Released Status in zlib source package in Focal: Fix Committed Status in zlib source package in Groovy: Fix Released Bug description: Description: zlib: inflateSyncPoint() returns an incorrect result on z15 Symptom: Certain rsync builds fail with "error in rsync protocol data stream" on z15. Problem: inflateSyncPoint() does not take into account the hardware compression state and returns an incorrect result. Solution: Make inflateSyncPoint() fail if the hardware compression is on. The hardware does not provide enough information in order to implement this function. [Impact] * Certain rsync builds fail with "error in rsync protocol data stream" on z15. * On ubuntu, rsync normally uses zstd or lz4. But when rsync is forced to use non-default zlib compression (-z flag) it uses inflateSyncPoint() API. This can also happen when rsync on the the other end doesn't support zstd & lz4. * inflateSyncPoint() does not take into account the hardware compression state and returns an incorrect result. * Make inflateSyncPoint() fail if the hardware compression is on. The hardware does not provide enough information in order to implement this function. * Above makes rsync to succeed, when zlib uses hardware compression. [Test Case] Reproduction: z15 only: printf 1 >1 && rsync -z 1 2 [Regression Potential] * inflateSyncPoint API is rarely used. Scanning codesearch, there is a lot of false positives due to embedded copies of zlib in all the things. I do see that both rsync and backuppc-rsync use it. It used during a safety check to ensure that algorithm is not at a sync point (or that cannot be determined). Nonetheless, returning error is a safer implementation for this API call. [Other Info] * This is a regression introduced by adding & enabling zlib hw acceleration by default on z15; and discovering using rsync that one API is implemented incorrectly. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1899621/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
