linux-kernel - Re: [PATCH v2 1/1] powerpc/eeh: fix recursive pci_lock_rescan

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <176835971846.41689.7422242896755052198.b4-ty@linux.ibm.com>
Date: Wed, 14 Jan 2026 08:34:20 +0530
From: Madhavan Srinivasan <maddy@...ux.ibm.com>
To: mahesh@...ux.ibm.com, oohall@...il.com, mpe@...erman.id.au,
        npiggin@...il.com, Christophe Leroy <chleroy@...nel.org>,
        Narayana Murty N <nnmlinux@...ux.ibm.com>
Cc: bhelgaas@...gle.com, tpearson@...torengineering.com,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        vaibhav@...ux.ibm.com, sbhat@...ux.ibm.com, ganeshgr@...ux.ibm.com
Subject: Re: [PATCH v2 1/1] powerpc/eeh: fix recursive pci_lock_rescan_remove locking in EEH event handling

On Wed, 10 Dec 2025 08:25:59 -0600, Narayana Murty N wrote:
> The recent commit 1010b4c012b0 ("powerpc/eeh: Make EEH driver device
> hotplug safe") restructured the EEH driver to improve synchronization
> with the PCI hotplug layer.
> 
> However, it inadvertently moved pci_lock_rescan_remove() outside its
> intended scope in eeh_handle_normal_event(), leading to broken PCI
> error reporting and improper EEH event triggering. Specifically,
> eeh_handle_normal_event() acquired pci_lock_rescan_remove() before
> calling eeh_pe_bus_get(), but eeh_pe_bus_get() itself attempts to
> acquire the same lock internally, causing nested locking and disrupting
> normal EEH event handling paths.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/eeh: fix recursive pci_lock_rescan_remove locking in EEH event handling
      https://git.kernel.org/powerpc/c/815a8d2feb5615ae7f0b5befd206af0b0160614c

cheers