[PATCH] PCI/AER: Fix NULL pointer access by aer_info

[Keith Busch]

On Thu, Sep 11, 2025 at 05:54:57PM -0500, Bjorn Helgaas wrote:
> [+cc Terry, Robert, CXL list, Smita, Dongdong]
> 
> On Fri, Sep 05, 2025 at 02:25:27AM +0800, Vernon Yang wrote:
> > From: Vernon Yang <yanglincheng at kylinos.cn>
> > 
> > The kzalloc(GFP_KERNEL) may return NULL, so all accesses to
> > aer_info->xxx will result in kernel panic. Fix it.
> > 
> > Signed-off-by: Vernon Yang <yanglincheng at kylinos.cn>
> 
> Applied to pci/aer for v6.18, thanks, Vernon!
> 
> Not directly related to this patch, but I'm concerned about some users
> of dev->aer_cap.

pci_aer_init is called pretty early during boot. If we can't malloc a
few hundred bytes at that point, the aer_cap users will be the least of
your concerns. :)