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Larysa Zaremba 0ad6d6e50e idpf: fix aux device unplugging when rdma is not supported by vport
[ Upstream commit 4648fb2f2e ]

If vport flags do not contain VIRTCHNL2_VPORT_ENABLE_RDMA, driver does not
allocate vdev_info for this vport. This leads to kernel NULL pointer
dereference in idpf_idc_vport_dev_down(), which references vdev_info for
every vport regardless.

Check, if vdev_info was ever allocated before unplugging aux device.

Fixes: be91128c57 ("idpf: implement RDMA vport auxiliary dev create, init, and destroy")
Reviewed-by: Madhu Chittim <madhu.chittim@intel.com>
Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-01-17 16:35:28 +01:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
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