wifi: ath10k: snoc: use memcpy_fromio() for MSA ramdump

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Summary

CVECVE-2026-90348
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:33 UTC
Updated2026-09-17 17:17:33 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: ath10k: snoc: use memcpy_fromio() for MSA ramdump On WCN3990/SNOC the MSA region is mapped with devm_memremap(MEMREMAP_WT). On arm64 such a mapping is not Normal-cacheable, so unaligned accesses to it are not permitted. ath10k_msa_dump_memory() copies the region with a plain memcpy(), whose optimized __pi_memcpy_generic implementation issues wide/unaligned loads. This triggers an alignment fault (FSC=0x21) Oops in ath10k_snoc_fw_crashed_dump() while collecting the devcoredump: Unable to handle kernel paging request ... FSC=0x21: alignment fault pc : __pi_memcpy_generic lr : ath10k_snoc_fw_crashed_dump [ath10k_snoc] The Oops both leaves the firmware RAM dump buffer zeroed (no dump is captured) and crashes the kernel, which in turn breaks modem SSR recovery. Use memcpy_fromio(), which only performs accesses that are valid for such a device-memory mapping. The generic memcpy_fromio() implementation aligns the source before issuing word-sized reads and stores the destination with put_unaligned(), so it is also safe for the coherent DMA allocation used on the non-reserved-memory path. ath11k and ath12k use the same pattern when copying target memory into crash dumps, so call it unconditionally here too. The MEMREMAP_WT pointer is a plain void *, so an explicit __iomem cast is needed; use __force to keep sparse happy. Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.3.3.7.c5-00107-QCAHLSWMTPL-1

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 3f14b73c38431a6a1ed24de568e18ed89b7082e2 e5bc3658da9c8a535e3fa5c0c875b2a456954e81 git Not specified
CNA Linux Linux affected 3f14b73c38431a6a1ed24de568e18ed89b7082e2 fed1f662c9f9fd19eeab6c01966b7b5a33804420 git Not specified
CNA Linux Linux affected 3f14b73c38431a6a1ed24de568e18ed89b7082e2 838cab267ce9a975776e022f25094f8cbe1625d2 git Not specified
CNA Linux Linux affected 3f14b73c38431a6a1ed24de568e18ed89b7082e2 eb946595a58decdb4cab1b5f3c972ae66f41f1c8 git Not specified
CNA Linux Linux affected 3f14b73c38431a6a1ed24de568e18ed89b7082e2 152e894e90716163c646d70f86b3afeb70442783 git Not specified
CNA Linux Linux affected 3f14b73c38431a6a1ed24de568e18ed89b7082e2 7039825a7479df637c4f5d546cb0e1cec18cd8e1 git Not specified
CNA Linux Linux affected 3f14b73c38431a6a1ed24de568e18ed89b7082e2 045d1bfb72d2631ab9ec74afa491aa788ebb57aa git Not specified
CNA Linux Linux affected 3f14b73c38431a6a1ed24de568e18ed89b7082e2 4f25071afe9218aaae1c63fbf75e229aa6405319 git Not specified
CNA Linux Linux affected 5.5 Not specified
CNA Linux Linux unaffected 5.5 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7039825a7479df637c4f5d546cb0e1cec18cd8e1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4f25071afe9218aaae1c63fbf75e229aa6405319 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/045d1bfb72d2631ab9ec74afa491aa788ebb57aa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/838cab267ce9a975776e022f25094f8cbe1625d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/eb946595a58decdb4cab1b5f3c972ae66f41f1c8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fed1f662c9f9fd19eeab6c01966b7b5a33804420 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/152e894e90716163c646d70f86b3afeb70442783 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e5bc3658da9c8a535e3fa5c0c875b2a456954e81 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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