From: Stephen Hemminger <stephen@networkplumber.org>
To: Rahul Bhansali <rbhansali@marvell.com>
Cc: <dev@dpdk.org>, Nithin Dabilpuram <ndabilpuram@marvell.com>,
Kiran Kumar K <kirankumark@marvell.com>,
Sunil Kumar Kori <skori@marvell.com>,
Satha Rao <skoteshwar@marvell.com>,
Harman Kalra <hkalra@marvell.com>,
"Rakesh Kudurumalla" <rkudurumalla@marvell.com>,
<jerinj@marvell.com>, Aarnav JP <ajp@marvell.com>,
<stable@dpdk.org>
Subject: Re: [PATCH 06/14] common/cnxk: fix null deref and irq ack in CPT CQ handler
Date: Thu, 17 Sep 2026 09:15:17 -0700 [thread overview]
Message-ID: <20260917091517.3566dfe7@phoenix.local> (raw)
In-Reply-To: <20260917071016.2366467-6-rbhansali@marvell.com>
On Thu, 17 Sep 2026 12:40:08 +0530
Rahul Bhansali <rbhansali@marvell.com> wrote:
> From: Aarnav JP <ajp@marvell.com>
>
> The CPT CQ interrupt handler (nix_inl_cpt_cq_cb) unconditionally
> dereferences lf->dev->roc_nix to obtain roc_nix, nix, and port_id.
> For inbound, the CPT LF belongs to the inline device which is not
> an ethdev, so roc_nix is NULL and the dereference crashes.
>
> Additionally, error paths returned without writing CPT_LF_DONE_ACK,
> leaving CQ entries unacknowledged causing the completion queue to
> fill up.
>
> Fix by deferring roc_nix/nix/port_id derivation into the outbound
> branch where roc_nix is valid, setting port_id to UINT32_MAX for
> inbound, and routing all error paths through a common cq_ack label
> that drains entries and writes CPT_LF_DONE_ACK.
>
> Fixes: 3fdf3e53f3c4 ("common/cnxk: enable CPT CQ for inline IPsec inbound")
> Cc: stable@dpdk.org
>
> Signed-off-by: Aarnav JP <ajp@marvell.com>
> ---
More detailed AI review:
Patch 6/14 common/cnxk: fix null deref and irq ack in CPT CQ handler
-------------------------------------------------------------------
Info: at cq_ack,
head = (lf->cq_head + count) % lf->cq_size;
overwrites the head the loop already computed on the normal path.
It is only needed for the early gotos.
next prev parent reply other threads:[~2026-09-17 16:18 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-17 7:10 [PATCH 01/14] net/cnxk: fix packet length handling Rahul Bhansali
2026-09-17 7:10 ` [PATCH 02/14] common/cnxk: disable CPT drop error in CQ Rahul Bhansali
2026-09-17 16:14 ` Stephen Hemminger
2026-09-17 7:10 ` [PATCH 03/14] common/cnxk: fix NIX QINT count reset Rahul Bhansali
2026-09-17 16:14 ` Stephen Hemminger
2026-09-17 7:10 ` [PATCH 04/14] common/cnxk: update channel mask for cn20k Rahul Bhansali
2026-09-17 7:10 ` [PATCH 05/14] common/cnxk: update macro " Rahul Bhansali
2026-09-17 7:10 ` [PATCH 06/14] common/cnxk: fix null deref and irq ack in CPT CQ handler Rahul Bhansali
2026-09-17 16:15 ` Stephen Hemminger [this message]
2026-09-17 7:10 ` [PATCH 07/14] common/cnxk: derive mbuf from CPT CQ in inline IRQ path Rahul Bhansali
2026-09-17 16:15 ` Stephen Hemminger
2026-09-17 7:10 ` [PATCH 08/14] net/cnxk: resolve mbuf from CPT CQ format in SSO work cb Rahul Bhansali
2026-09-17 16:16 ` Stephen Hemminger
2026-09-17 7:10 ` [PATCH 09/14] common/cnxk: update bpid config for cn20k Rahul Bhansali
2026-09-17 16:16 ` Stephen Hemminger
2026-09-17 7:10 ` [PATCH 10/14] net/cnxk: add MSNS inb SA and CN20K CPT result struct Rahul Bhansali
2026-09-17 16:16 ` Stephen Hemminger
2026-09-17 7:10 ` [PATCH 11/14] common/cnxk: fix CPT CQ base address calculation Rahul Bhansali
2026-09-17 7:10 ` [PATCH 12/14] common/cnxk: update mode param for link speed Rahul Bhansali
2026-09-17 16:17 ` Stephen Hemminger
2026-09-17 7:10 ` [PATCH 13/14] common/cnxk: support for cn20k legacy msns mode Rahul Bhansali
2026-09-17 16:18 ` Stephen Hemminger
2026-09-17 7:10 ` [PATCH 14/14] net/cnxk: fix custom inbound SA condition check Rahul Bhansali
2026-09-17 16:12 ` [PATCH 01/14] net/cnxk: fix packet length handling Stephen Hemminger
2026-09-17 16:29 ` Stephen Hemminger
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260917091517.3566dfe7@phoenix.local \
--to=stephen@networkplumber.org \
--cc=ajp@marvell.com \
--cc=dev@dpdk.org \
--cc=hkalra@marvell.com \
--cc=jerinj@marvell.com \
--cc=kirankumark@marvell.com \
--cc=ndabilpuram@marvell.com \
--cc=rbhansali@marvell.com \
--cc=rkudurumalla@marvell.com \
--cc=skori@marvell.com \
--cc=skoteshwar@marvell.com \
--cc=stable@dpdk.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox