crypto: caam - fix netdev memory leak in dpaa2_caam_probe

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Summary

CVECVE-2026-45900
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:04 UTC
Updated2026-05-27 14:48:31 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: crypto: caam - fix netdev memory leak in dpaa2_caam_probe When commit 0e1a4d427f58 ("crypto: caam: Unembed net_dev structure in dpaa2") converted embedded net_device to dynamically allocated pointers, it added cleanup in dpaa2_dpseci_disable() but missed adding cleanup in dpaa2_dpseci_free() for error paths. This causes memory leaks when dpaa2_dpseci_dpio_setup() fails during probe due to DPIO devices not being ready yet. The kernel's deferred probe mechanism handles the retry successfully, but the netdevs allocated during the failed probe attempt are never freed, resulting in kmemleak reports showing multiple leaked netdev-related allocations all traced back to dpaa2_caam_probe(). Fix this by preserving the CPU mask of allocated netdevs during setup and using it for cleanup in dpaa2_dpseci_free(). This approach ensures that only the CPUs that actually had netdevs allocated will be cleaned up, avoiding potential issues with CPU hotplug scenarios.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0e1a4d427f58b843864d835ccb79c32a118c6a77 d5c6f254528caf78d5de7d9646dc21c81d351827 git Not specified
CNA Linux Linux affected 0e1a4d427f58b843864d835ccb79c32a118c6a77 d7decb572b55d2af33e59e9858fcee5d9ae69175 git Not specified
CNA Linux Linux affected 0e1a4d427f58b843864d835ccb79c32a118c6a77 e144cce29851610ce9c6eda405ce21118779aa51 git Not specified
CNA Linux Linux affected 0e1a4d427f58b843864d835ccb79c32a118c6a77 7d43252b3060b0ba4a192dce5dba85a3f39ffe39 git Not specified
CNA Linux Linux affected 6.11 Not specified
CNA Linux Linux unaffected 6.11 semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.14 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.4 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7d43252b3060b0ba4a192dce5dba85a3f39ffe39 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d5c6f254528caf78d5de7d9646dc21c81d351827 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e144cce29851610ce9c6eda405ce21118779aa51 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d7decb572b55d2af33e59e9858fcee5d9ae69175 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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