On Thu, May 25, 2023 at 07:12:47PM +0200, Salvatore Bonaccorso wrote: > Control: tags -1 + confirmed pending > > Hi Apollon, > > On Thu, May 25, 2023 at 03:26:50PM +0300, Apollon Oikonomopoulos wrote: > > Source: linux > > Version: 6.1.27-1 > > Severity: critical > > Tags: upstream > > Affects: ganeti > > Justification: breaks unrelated software > > > > Dear Kernel Maintainers, > > > > A regression was introduced with upstream commit 58c5d0d6d5, > > subsequently backported to 6.1 as 7e6631f7 and released with 6.1.26. > > These commits break MAP_32BIT and affect applications relying on it. In > > particular, we are seeing failures in ganeti's autopkgtests[1], where a > > daemon written in Haskell (the GHC linker uses MAP_32BIT) segfaults with > > a null pointer dereference. From the build artifacts: > > > > ganeti-luxid: mmap 4096 bytes at (nil): Cannot allocate memory > > ganeti-luxid: Try specifying an address with +RTS -xm<addr> -RTS > > > > This has already been discussed on GHC's discourse[2] and has been fixed > > upstream, with the fix queued for 6.1.30[3]. Please consider upgrading > > to 6.1.30 or cherry-picking the fix for Bookworm. > > I'm not yet certain, that critical severity is right, and making it > RC. But will look into the issue today. > > Defitnively the issue will be fixed. Just at this stage for the > bookworm release I will pick it for the first upload after the release > in a point release update or a security update (whatever will come > first likely). > > In any case I'm already preparing the 6.1.30 import for bookworm.
For the record, https://lore.kernel.org/linux-mm/cb8dc31a-fef2-1d09-f133-e9f7b9f9e...@sony.com/ gives a reproducer/verifier for the issue. Regards, Salvatore
