Re: kern/58111: Tracking issue for potential ZFS data corruption

[Simon Burge <simonb%NetBSD.org@localhost>]

The following reply was made to PR kern/58111; it has been noted by GNATS.

From: Simon Burge <simonb%NetBSD.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
    netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/58111: Tracking issue for potential ZFS data corruption
Date: Fri, 05 Apr 2024 00:59:26 +1100

 mp%petermann-it.de@localhost wrote:
 
 > >Number:         58111
 > >Category:       kern
 > >Synopsis:       Tracking issue for potential ZFS data corruption
 > ...
 > Tracking tickets on FreeBSD: =
 
 >
 >   https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275308
 >   https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D256205
 >
 > Accompanying articles:
 >
 >   https://www.theregister.com/2023/11/27/openzfs_2_2_0_data_corruption/
 >   https://www.theregister.com/2023/12/04/two_new_versions_of_openzfs/
 >
 > Thanks to Riastradh for the initial assessment and guidance!
 > >How-To-Repeat:
 > see FreeBSD tickets
 > >Fix:
 > see FreeBSD tickets
 
 FreeBSD 12.4 which uses similar ZFS code to us is affected:
 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275308#c22
 
 The fix is here:
 https://github.com/robn/freebsd-src/commit/b51ff59cce9c288111f84c8541986ac=
 6647703e7
 
 https://www.freebsd.org/security/patches/EN-23:16/openzfs.12.patch
 applies cleanly to our tree, builds and boots.
 
 There's a reproducer script in https://www.illumos.org/issues/16087
 that doesn't trigger for NetBSD using coreutils "cp" as we don't expose
 SEEK_DATA and SEEK_HOLE directly.  We _may_ be able to get to the code
 path via "ioctl(fd, FIOSEEKDATA, &arg)" and "ioctl(fd, FIOSEEKHOLE, &arg)"=
 ?
 
 Cheers,
 Simon.