crypto/ccm.c in the Linux kernel 4.9.x and 4.10.x through 4.10.12
interacts incorrectly with the CONFIG_VMAP_STACK option, which allows
local users to cause a denial of service (system crash or memory
corruption) or possibly have unspecified other impact by leveraging
use of more than one virtual page for a DMA scatterlist.
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1445344]
The commit that this patch fixes was not until 4.11-rc1, 4.9 and 4.10 both have idata/odata as part of pctx. This bug never shipped in a released kernel, it was introduced in the 4.11 merge window and resolved in the merge window.