arch/arm64/mm/dma-mapping.c in the Linux kernel before 4.0.3, as used in...

Vulnerability Description

arch/arm64/mm/dma-mapping.c in the Linux kernel before 4.0.3, as used in the ION subsystem in Android and other products, does not initialize certain data structures, which allows local users to obtain sensitive information from kernel memory by triggering a dma_mmap call.

References

• https://source.codeaurora.org/quic/la/kernel/msm-3.10/commit/?id=6e2c437a2d0a85d90d3db85a7471f99764f7bbf8
• https://github.com/torvalds/linux/commit/6829e274a623187c24f7cfc0e3d35f25d087fcc5
• http://source.android.com/security/bulletin/2016-10-01.html
• http://www.securityfocus.com/bid/93318
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.3
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6829e274a623187c24f7cfc0e3d35f25d087fcc5