Re: [PATCH net v2] net: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling
Breno Leitao <[email protected]>
| Newsgroups | gmane.linux.network |
|---|---|
| Message-ID | <[email protected]> |
On Mon, Aug 03, 2026 at 03:20:21PM +0800, Jiawen Wu wrote:
> In non-MSI-X mode (such as legacy INTx or single MSI), wx->msix_entry is
> not allocated or initialized. Calling NGBE_INTR_MISC(wx) dereferences
> wx->msix_entry->entry, leading to a NULL pointer dereference crash.
>
> This issue was introduced by fixing the IRQ vector when the number of
> VFs is 7. Fix the issue by explicitly checking `pdev->msix_enabled` to
> determine the correct vector index.
>
> Fixes: 4174c0c331a2 ("net: ngbe: specify IRQ vector when the number of VFs is 7")
> Signed-off-by: Jiawen Wu <[email protected]>
Reviewed-by: Breno Leitao <[email protected]>