Re: [PATCH] wifi: ath12k: fix read pointer after free in ath12k_mac_assign_vif_to_vdev()

[Kalle Valo]

Aditya Kumar Singh <quic_adisi@xxxxxxxxxxx> writes:

> In ath12k_mac_assign_vif_to_vdev(), if arvif is created on a different
> radio, it gets deleted from that radio through a call to
> ath12k_mac_unassign_link_vif(). This action frees the arvif pointer.
> Subsequently, there is a check involving arvif, which will result in a
> read-after-free scenario.
>
> Fix this by moving this check after arvif is again assigned via call to
> ath12k_mac_assign_link_vif().
>
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
>
> Closes: https://scan5.scan.coverity.com/#/project-view/63541/10063?selectedIssue=1636423
> Fixes: b5068bc9180d ("wifi: ath12k: Cache vdev configs before vdev create")
> Signed-off-by: Aditya Kumar Singh <quic_adisi@xxxxxxxxxxx>

Acked-by: Kalle Valo <kvalo@xxxxxxxxxx>

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