| Date | Mon, 27 Jun 2022 21:38:47 -0700 | From | Jakub Kicinski <> | Subject | Re: [PATCH AUTOSEL 5.18 24/53] drivers/net/ethernet/neterion/vxge: Fix a use-after-free bug in vxge-main.c |
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On Mon, 27 Jun 2022 22:18:10 -0400 Sasha Levin wrote: > From: Wentao_Liang <Wentao_Liang_g@163.com> > > [ Upstream commit 8fc74d18639a2402ca52b177e990428e26ea881f ] > > The pointer vdev points to a memory region adjacent to a net_device > structure ndev, which is a field of hldev. At line 4740, the invocation > to vxge_device_unregister unregisters device hldev, and it also releases > the memory region pointed by vdev->bar0. At line 4743, the freed memory > region is referenced (i.e., iounmap(vdev->bar0)), resulting in a > use-after-free vulnerability. We can fix the bug by calling iounmap > before vxge_device_unregister.
This is a dud see commit 877fe9d49b74 ("Revert "drivers/net/ethernet/neterion/vxge: Fix a use-after-free bug in vxge-main.c"")
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