Use-after-free vulnerability in the disk_seqf_stop function in block/genhd.c in the Linux kernel before 4.7.1 allows local users to gain privileges by leveraging the execution of a certain stop operation even if the corresponding start operation had failed.
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=77da160530dd1dc94f6ae15a981f24e5f0021e84
source.android.com/security/bulletin/2016-11-01.html
www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.7.1
www.securityfocus.com/bid/94135
access.redhat.com/errata/RHSA-2017:0892
access.redhat.com/errata/RHSA-2017:1297
access.redhat.com/errata/RHSA-2017:1298
access.redhat.com/errata/RHSA-2017:1308
github.com/torvalds/linux/commit/77da160530dd1dc94f6ae15a981f24e5f0021e84