powerpc/eeh: Fix recursive locking on devices without EEH sensitive driver

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-97948
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:22 UTC
Updated2026-09-25 11:17:22 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: powerpc/eeh: Fix recursive locking on devices without EEH sensitive driver The commit 1010b4c012b0 ("powerpc/eeh: Make EEH driver device hotplug safe") refactored the EEH code such that the pci_rescan_remove_lock is held at the beginning of eeh_handle_normal_event() and the eeh_reset_device() is called with that lock being held. Looks like the commit missed to remove the existing lock/unlock inside eeh_rmv_device() which is no longer necessary. This is causing the eehd to hang on the lock which it actually holds when that code path is taken. [<0>] 0xc00000011c78f870 [<0>] __switch_to+0xfc/0x1a0 [<0>] pci_lock_rescan_remove+0x30/0x44 [<0>] eeh_rmv_device+0x290/0x2e0 [<0>] eeh_pe_dev_traverse+0x80/0x130 [<0>] eeh_reset_device+0xcc/0x23c [<0>] eeh_handle_normal_event+0x830/0xa80 [<0>] eeh_event_handler+0xf8/0x190 [<0>] kthread+0x194/0x1b0 [<0>] start_kernel_thread+0x14/0x18 The issue is seen for cases where the errors are detected on the PHB directly AND|OR for devices where the driver error_detected() returns PCI_ERS_RESULT_NEED_RESET, and driver being not EEH sensitive(i.e no error handlers like slot_reset(), resume() etc defined).

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d2c60a8a387e9fcc28447ef36c03f8e49fd052a6 102e3dc5ab5ba052e294819e83384166b242c1ec git Not specified
CNA Linux Linux affected 1010b4c012b0d78dfb9d3132b49aa2ef024a07a7 2920af33d097ca335e492b346af70b72986ad6dc git Not specified
CNA Linux Linux affected 1010b4c012b0d78dfb9d3132b49aa2ef024a07a7 85d8eaefc052cf3e5ae2c7bafeda2db68b8898b4 git Not specified
CNA Linux Linux affected 1010b4c012b0d78dfb9d3132b49aa2ef024a07a7 c5e68706527968282e49de205cc2b935823cb88a git Not specified
CNA Linux Linux affected 502f08831a9afb72dc98a56ae6504da43e93b250 git Not specified
CNA Linux Linux affected f56e004b781719d8fdf6c9619b15caf2579bc1f2 git Not specified
CNA Linux Linux affected 59c6d3d81d42bf543c90597b4f38c53d6874c5a1 git Not specified
CNA Linux Linux affected a426e8a6ae161f51888585b065db0f8f93ab2e16 git Not specified
CNA Linux Linux affected d42bbd8f30ac38b1ce54715bf08ec3dac18d6b25 git Not specified
CNA Linux Linux affected 19d5036e7ad766cf212aebec23b9f1d7924a62bc git Not specified
CNA Linux Linux affected 6.12.42 6.12.111 semver Not specified
CNA Linux Linux affected 5.10.241 5.11 semver Not specified
CNA Linux Linux affected 5.15.190 5.16 semver Not specified
CNA Linux Linux affected 6.1.148 6.2 semver Not specified
CNA Linux Linux affected 6.6.102 6.7 semver Not specified
CNA Linux Linux affected 6.15.10 6.16 semver Not specified
CNA Linux Linux affected 6.16.1 6.17 semver Not specified
CNA Linux Linux affected 6.17 Not specified
CNA Linux Linux unaffected 6.17 semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/2920af33d097ca335e492b346af70b72986ad6dc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/85d8eaefc052cf3e5ae2c7bafeda2db68b8898b4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/102e3dc5ab5ba052e294819e83384166b242c1ec 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c5e68706527968282e49de205cc2b935823cb88a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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