Server crash with kernel memory exposure attempt detected.

Solution Verified - Updated -

Issue

Server crashes in hardened usercopy code with error:

[  361.764618] usercopy: kernel memory exposure attempt detected from ffff9146b4242015 (kmalloc-4096) (16379 bytes)

Environment

  • Red Hat Enterprise Linux 7.6
  • Red Hat Enterprise Linux 7.5
  • Red Hat Enterprise Linux 7.4

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