897366537f("genhd: Fix use after free in __blkdev_get()")

Hello,

Syzkaller has reported a crash here[1] for a UAF in disk_unblock_events.

Could the following patches be applied in order to 4.14?

517bf3c30("block: don't look at the struct device dev_t in disk_devt") 8ddcd653("block: introduce GENHD_FL_HIDDEN") f0fba398fe("block: avoid null pointer dereference on null disk") d52987b5("genhd: Fix leaked module reference for NVME devices") 9df6c2991("genhd: Add helper put_disk_and_module()") 89736653("genhd: Fix use after free in __blkdev_get()")

[1] https://syzkaller.appspot.com/bug?id=d932bb61fb530dc6816b87b4649f3b6925f5102...

Thanks, Zubin