ACK: [Jammy,Kinetic,OEM-5.17,OEM-6.0 0/1] CVE-2023-0386

[Tim Gardner]

On 4/11/23 6:24 AM, Thadeu Lima de Souza Cascardo wrote:
> [Impact]
> Unprivileged user may copy a suid binary from a nosuid mount.
> 
> [Backport]
> Applying to all kernels that have not been released with the fix yet.
> This is mitigated on older kernels with different SAUCE changes.
> 
> [Test case]
> Touching a suid binary on an overlayfs mount does not copy it to the upper
> directory any longer after applying this fix.
> 
> [Potential regression]
> Some copy ups on overlayfs will fail, preventing certain operations.
> 
> Miklos Szeredi (1):
>    ovl: fail on invalid uid/gid mapping at copy up
> 
>   fs/overlayfs/copy_up.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
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Tim Gardner
Canonical, Inc