i2c: designware: amdisp: Fix resume-probe race condition issue

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Summary

CVECVE-2026-31572
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-24 15:16:31 UTC
Updated2026-04-24 17:51:40 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: i2c: designware: amdisp: Fix resume-probe race condition issue Identified resume-probe race condition in kernel v7.0 with the commit 38fa29b01a6a ("i2c: designware: Combine the init functions"),but this issue existed from the beginning though not detected. The amdisp i2c device requires ISP to be in power-on state for probe to succeed. To meet this requirement, this device is added to genpd to control ISP power using runtime PM. The pm_runtime_get_sync() called before i2c_dw_probe() triggers PM resume, which powers on ISP and also invokes the amdisp i2c runtime resume before the probe completes resulting in this race condition and a NULL dereferencing issue in v7.0 Fix this race condition by using the genpd APIs directly during probe: - Call dev_pm_genpd_resume() to Power ON ISP before probe - Call dev_pm_genpd_suspend() to Power OFF ISP after probe - Set the device to suspended state with pm_runtime_set_suspended() - Enable runtime PM only after the device is fully initialized

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d6263c468a761cd4c89887073614394ac48441e1 83bcea9da91965484df64a6492b89e65d41ab31c git Not specified
CNA Linux Linux affected d6263c468a761cd4c89887073614394ac48441e1 e81f0341754c309e33babea2821eda8f98f0b44c git Not specified
CNA Linux Linux affected d6263c468a761cd4c89887073614394ac48441e1 e2f1ada8e089dd5a331bcd8b88125ae2af8d188f git Not specified
CNA Linux Linux affected 6.16 Not specified
CNA Linux Linux unaffected 6.16 semver Not specified
CNA Linux Linux unaffected 6.18.21 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.11 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e81f0341754c309e33babea2821eda8f98f0b44c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/83bcea9da91965484df64a6492b89e65d41ab31c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e2f1ada8e089dd5a331bcd8b88125ae2af8d188f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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