On Thu, May 13, 2021 at 09:34:46AM -0700, Edwin Peer wrote:
> Hello stable team,
>
> Please consider adding the following upstream commit to the 4.14 stable series:
>
> commit 43731753c4b7d832775cf6b2301dd0447a5a1851
> Author: Andrew Boyer <andrew.boyer@xxxxxxxx>
> Date: Mon May 7 13:23:38 2018 -0400
>
> RDMA/i40iw: Avoid panic when reading back the IRQ affinity hint
>
> The current code sets an affinity hint with a cpumask_t stored on the
> stack. This value can then be accessed through /proc/irq/*/affinity_hint/,
> causing a segfault or returning corrupt data.
>
> Move the cpumask_t into struct i40iw_msix_vector so it is available later.
> ...
> ...
> ...
> Fixes: 8e06af711bf2 ("i40iw: add main, hdr, status")
> Signed-off-by: Andrew Boyer <andrew.boyer@xxxxxxxx>
> Reviewed-by: Shiraz Saleem <shiraz.saleem@xxxxxxxxx>
> Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
>
> Note, the fixes tag above appears to be incorrect. The problem was
> introduced in:
>
> commit e69c5093617afdbd2ab02c289d0adaac044dff66
> Author: Henry Orosco <henry.orosco@xxxxxxxxx>
> Date: Wed Nov 9 21:24:48 2016 -0600
>
> i40iw: Use vector when creating CQs
>
> Assign each CEQ vector to a different CPU when possible, then
> when creating a CQ, use the vector for the CEQ id. This
> allows completion work to be distributed over multiple cores.
>
> Signed-off-by: Mustafa Ismail <mustafa.ismail@xxxxxxxxx>
> Signed-off-by: Henry Orosco <henry.orosco@xxxxxxxxx>
> Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
>
> Thus, affected kernels range from 4.10 to pre 4.17.
>
> Regards,
> Edwin Peer
Now queued up, thanks.
greg k-h
