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=d932bb61fb530dc6816b87b4649f3b6925f51026
Thanks,
Zubin
