Re: general protection fault in lo_ioctl (2)

[Tetsuo Handa]

On 2018/05/02 20:23, Dmitry Vyukov wrote:
> #syz dup: INFO: rcu detected stall in blkdev_ioctl

The cause of stall turned out to be ioctl(loop_fd, LOOP_CHANGE_FD, loop_fd).

But we haven't explained the cause of NULL pointer dereference which can
occur when raced with ioctl(LOOP_CLR_FD). Therefore,

#syz undup