APPLIED: [SRU][J:linux-bluefield][PATCH v1 0/1] genetlink: correctly begin the iteration over policies

[Kuba Pawlak]

On 20.07.2025 17:20, Stav Aviram wrote:
> BugLink: https://bugs.launchpad.net/bugs/2117349
>
> SRU Justification:
>
> [Impact]
> In BF5.15 (Jammy), CX7 cards experience consistent CQ errors with
> syndrome 0x1 when running a performance script:
> cq_err_event_notifier:538:(pid 9712): CQ error on CQN 0x424, syndrome 0x1
>
> Multiple call traces appear in dmesg and the system becomes
> unresponsive. The test may require multiple iterations to trigger the
> issue.
> The root cause appears to be a missing upstream fix that can lead to
> crashes or warnings when netlink policy is not found, potentially
> causing the observed CQ errors during high-connection testing scenarios.
>
> [Fix]
> Cherry picking the upstream commit:
> 154ba79c9f16 ("genetlink: correctly begin the iteration over policies")
>
> This commit fixes incorrect initialization in genl_op_iter_init() by
> ensuring genl_op_iter_next() is called to properly begin the iteration.
> The fix prevents crashes and warnings in
> netlink_policy_dump_get_policy_idx() when policy is not found, which may
> be contributing to the CQ error condition during intensive connection
> testing.
>
> [Test Case]
> Compile tested on linux-bluefield-5.15 on the master-next branch.
> Functional testing involves:
> Running the test with multiple iterations on CX7 hardware with a
> linux-bluefield-5.15 kernel that includes the fix. With the patch
> applied, the test should complete without CQ errors and system should
> remain responsive.
>
> [Regression Potential]
> The change is minimal and matches the upstream implementation exactly.
>
> Jakub Kicinski (1):
>    genetlink: correctly begin the iteration over policies
>
>   net/netlink/genetlink.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
>
Applied-by: Kuba Pawlak <kuba.pawlak at canonical.com>
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