APPLIED: [PULL REQUEST][focal/linux-azure] Fix race on per-CQ variable napi work_done

[Tim Gardner]

On 1/19/23 8:05 AM, Tim Gardner wrote:
> SRU Justification
> 
> https://bugs.launchpad.net/bugs/2003353
> 
> [Impact]
> 
> This patch [1]1 is requested by MSFT Linux Systems Group to fix a race 
> condition that can cause a panic in napi_iperf().
> 
> [1] - 
> https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=18010ff776fa42340efc428b3ea6d19b3e7c7b21
> 
> A number of prerequisite patches are required. v5.15.83 contains this 
> patch, however v5.19 stable does not.
> 
> [Test Case]
> 
> MSFT tested and approved, "Please merge in both the kernels, LSG 
> finished the validation".
> 
> [Where things could go wrong]
> 
> Test results are good. Regression potential seems low.
> 
> [Other Info]
> 
> SF: #00350135
> 
> ----------------------------------------------------------------
> 
> The following changes since commit 
> f02acc2610ccac22acaa1713e8f767e7504fe72d:
> 
>    UBUNTU: Ubuntu-azure-5.4.0-1102.108 (2023-01-17 08:58:09 -0700)
> 
> are available in the Git repository at:
> 
>    git://git.launchpad.net/~timg-tpi/ubuntu/+source/linux/+git/focal 
> focal-azure-Fix-race-on-per-CQ-variable-napi_iperf-panic-fix-sf00350135
> 
> for you to fetch changes up to 061b7c9da6bc794e26802178cf2edfe38087f52c:
> 
>    net: mana: Fix race on per-CQ variable napi work_done (2023-01-19 
> 08:01:48 -0700)
> 
> ----------------------------------------------------------------
> Christophe JAILLET (1):
>        net: mana: Fix a memory leak in an error handling path in 
> 'mana_create_txq()'
> 
> Gustavo A. R. Silva (1):
>        net: mana: Use struct_size() in kzalloc()
> 
> Haiyang Zhang (5):
>        net: mana: Move NAPI from EQ to CQ
>        net: mana: Add support for EQ sharing
>        net: mana: Add WARN_ON_ONCE in case of CQE read overflow
>        net: mana: Fix error handling in mana_create_rxq()
>        net: mana: Fix race on per-CQ variable napi work_done
> 
> Len Baker (1):
>        net: mana: Prefer struct_size over open coded arithmetic
> 
>   drivers/net/ethernet/microsoft/mana/gdma.h       |  39 +++++++++------
>   drivers/net/ethernet/microsoft/mana/gdma_main.c  |  88 
> +++++++++++-----------------------
>   drivers/net/ethernet/microsoft/mana/hw_channel.c |   6 +--
>   drivers/net/ethernet/microsoft/mana/mana.h       |  29 +++++++-----
>   drivers/net/ethernet/microsoft/mana/mana_en.c    | 183 
> +++++++++++++++++++++++++++++++++++++++++------------------------------
>   5 files changed, 176 insertions(+), 169 deletions(-)
Applied to focal/linux-azure:master-next. Thanks.

-rtg
-- 
-----------
Tim Gardner
Canonical, Inc