All of lore.kernel.org
 help / color / mirror / Atom feed
From: David Carlier <devnexen@gmail.com>
To: anthony.l.nguyen@intel.com, przemyslaw.kitszel@intel.com
Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com,
	kuba@kernel.org, pabeni@redhat.com, horms@kernel.org,
	intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org,
	David Carlier <devnexen@gmail.com>
Subject: [Intel-wired-lan] [PATCH net] idpf: handle NULL adev in idpf_idc_vdev_mtu_event
Date: Sun, 10 May 2026 00:37:22 +0100	[thread overview]
Message-ID: <20260509233722.111895-1-devnexen@gmail.com> (raw)

idpf_idc_vport_dev_ctrl(adapter, false) sets vport->vdev_info->adev
to NULL but keeps vport->vdev_info itself. An MTU change after that
calls idpf_idc_vdev_mtu_event(), which derefs vdev_info->adev for
device_lock() before reaching the (!adev || ...) check.

NULL-check vdev_info->adev before locking.

Fixes: ed6e1c8796a4 ("idpf: implement IDC vport aux driver MTU change handler")
Cc: stable@vger.kernel.org
Signed-off-by: David Carlier <devnexen@gmail.com>
---
 drivers/net/ethernet/intel/idpf/idpf_idc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/idpf/idpf_idc.c b/drivers/net/ethernet/intel/idpf/idpf_idc.c
index b7d6b08fc89e..3ba52a80d52f 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_idc.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_idc.c
@@ -162,9 +162,12 @@ void idpf_idc_vdev_mtu_event(struct iidc_rdma_vport_dev_info *vdev_info,
 
 	set_bit(event_type, event.type);
 
+	if (!vdev_info->adev)
+		return;
+
 	device_lock(&vdev_info->adev->dev);
 	adev = vdev_info->adev;
-	if (!adev || !adev->dev.driver)
+	if (!adev->dev.driver)
 		goto unlock;
 	iadrv = container_of(adev->dev.driver,
 			     struct iidc_rdma_vport_auxiliary_drv,
-- 
2.53.0


WARNING: multiple messages have this Message-ID (diff)
From: David Carlier <devnexen@gmail.com>
To: anthony.l.nguyen@intel.com, przemyslaw.kitszel@intel.com
Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com,
	kuba@kernel.org, pabeni@redhat.com, horms@kernel.org,
	intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org,
	David Carlier <devnexen@gmail.com>
Subject: [PATCH net] idpf: handle NULL adev in idpf_idc_vdev_mtu_event
Date: Sun, 10 May 2026 00:37:22 +0100	[thread overview]
Message-ID: <20260509233722.111895-1-devnexen@gmail.com> (raw)

idpf_idc_vport_dev_ctrl(adapter, false) sets vport->vdev_info->adev
to NULL but keeps vport->vdev_info itself. An MTU change after that
calls idpf_idc_vdev_mtu_event(), which derefs vdev_info->adev for
device_lock() before reaching the (!adev || ...) check.

NULL-check vdev_info->adev before locking.

Fixes: ed6e1c8796a4 ("idpf: implement IDC vport aux driver MTU change handler")
Cc: stable@vger.kernel.org
Signed-off-by: David Carlier <devnexen@gmail.com>
---
 drivers/net/ethernet/intel/idpf/idpf_idc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/idpf/idpf_idc.c b/drivers/net/ethernet/intel/idpf/idpf_idc.c
index b7d6b08fc89e..3ba52a80d52f 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_idc.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_idc.c
@@ -162,9 +162,12 @@ void idpf_idc_vdev_mtu_event(struct iidc_rdma_vport_dev_info *vdev_info,
 
 	set_bit(event_type, event.type);
 
+	if (!vdev_info->adev)
+		return;
+
 	device_lock(&vdev_info->adev->dev);
 	adev = vdev_info->adev;
-	if (!adev || !adev->dev.driver)
+	if (!adev->dev.driver)
 		goto unlock;
 	iadrv = container_of(adev->dev.driver,
 			     struct iidc_rdma_vport_auxiliary_drv,
-- 
2.53.0


             reply	other threads:[~2026-05-09 23:37 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-09 23:37 David Carlier [this message]
2026-05-09 23:37 ` [PATCH net] idpf: handle NULL adev in idpf_idc_vdev_mtu_event David Carlier
2026-05-13 18:16 ` ALOK TIWARI
2026-05-13 18:16   ` [Intel-wired-lan] " ALOK TIWARI via Intel-wired-lan

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=20260509233722.111895-1-devnexen@gmail.com \
    --to=devnexen@gmail.com \
    --cc=andrew+netdev@lunn.ch \
    --cc=anthony.l.nguyen@intel.com \
    --cc=davem@davemloft.net \
    --cc=edumazet@google.com \
    --cc=horms@kernel.org \
    --cc=intel-wired-lan@lists.osuosl.org \
    --cc=kuba@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=pabeni@redhat.com \
    --cc=przemyslaw.kitszel@intel.com \
    --cc=stable@vger.kernel.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.