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Bug#1086028: Please apply 8fa507083388 ("mm/memory: Use exception ip to search exception tables") (and one required dependency) to v6.1.y

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  Bug#1086028: Please apply 8fa507083388 ("mm/memory: Use exception ip to search exception tables") (and one required dependency) to v6.1.y Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2025-03-05 15:20 +0100

#86343 — Bug#1086028: Please apply 8fa507083388 ("mm/memory: Use exception ip to search exception tables") (and one required dependency) to v6.1.y

On Wed, Feb 26, 2025 at 08:36:45PM +0100, Salvatore Bonaccorso wrote:
> Hi Greg, hi Sasha
> 
> A while back the following regression after 4bce37a68ff8 ("mips/mm:
> Convert to using lock_mm_and_find_vma()") was reported:
> https://lore.kernel.org/all/75e9fd7b08562ad9b456a5bdaacb7cc220311cc9.camel@xry111.site/
> affecting mips64el. This was later on fixed by 8fa507083388
> ("mm/memory: Use exception ip to search exception tables") in 6.8-rc5
> and which got backported to 6.7.6 and 6.6.18.
> 
> The breaking commit was part of a series covering a security fix
> (CVE-2023-3269), and landed in 6.5-rc1 and backported to 6.4.1, 6.3.11
> and 6.1.37.
> 
> So far 6.1.y remained unfixed and in fact in Debian we got reports
> about this issue seen on the build infrastructure when building
> various packages, details are in:
> https://bugs.debian.org/1086028
> https://bugs.debian.org/1087809
> https://bugs.debian.org/1093200
> 
> The fix probably did not got backported as there is one dependency
> missing which was not CC'ed for stable afaics.
> 
> Thus, can you please cherry-pick the following two commits please as
> well for 6.1.y?
> 
> 11ba1728be3e ("ptrace: Introduce exception_ip arch hook")
> 8fa507083388 ("mm/memory: Use exception ip to search exception tables")
> 
> Sergei Golovan confirmed as well by testing that this fixes the seen
> issue as well in 6.1.y, cf. https://bugs.debian.org/1086028#95
> 
> Thanks in advance already.

Now queued up, thanks.

greg k-h

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