linux-kernel - Re: [PATCH] powerpc/pseries/msi: Fix NULL pointer dereference at irq domain teardown

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Message-ID: <176076456872.59904.2831569431349537120.b4-ty@linux.ibm.com>
Date: Sat, 18 Oct 2025 11:03:51 +0530
From: Madhavan Srinivasan <maddy@...ux.ibm.com>
To: Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Nam Cao <namcao@...utronix.de>
Cc: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>
Subject: Re: [PATCH] powerpc/pseries/msi: Fix NULL pointer dereference at irq domain teardown

On Fri, 10 Oct 2025 12:03:07 +0000, Nam Cao wrote:
> pseries_msi_ops_teardown() reads pci_dev* from msi_alloc_info_t. However,
> pseries_msi_ops_prepare() does not populate this structure, thus it is all
> zeros. Consequently, pseries_msi_ops_teardown() triggers a NULL pointer
> dereference crash.
> 
> struct pci_dev is available in struct irq_domain. Read it there instead.
> 
> [...]

Applied to powerpc/fixes.

[1/1] powerpc/pseries/msi: Fix NULL pointer dereference at irq domain teardown
      https://git.kernel.org/powerpc/c/ef3e73a917ec7d080e0fb0e4015098a4fb0f1cff

Thanks