On Mon, Oct 23, 2017 at 3:08 PM, Bart Van Assche [off-list ref] wrote:

On Mon, 2017-10-23 at 09:41 -0600, dann frazier wrote:

quoted

(gdb) list *(sg_io+0x120)
0xffff0000084e71a8 is in sg_io (./include/linux/uaccess.h:113).
108   static inline unsigned long
109   _copy_from_user(void *to, const void __user *from, unsigned long n)
110   {
111           unsigned long res = n;
112           might_fault();
113           if (likely(access_ok(VERIFY_READ, from, n))) {
114                   kasan_check_write(to, n);
115                   res = raw_copy_from_user(to, from, n);
116           }
117           if (unlikely(res))

Hello Dann,

Would it be possible to check whether the patch below is sufficient to fix this?

hey Bart,
 Yes, it does appear to be sufficient:

ubuntu at ubuntu:~$ sudo dmesg -c > /dev/null
ubuntu at ubuntu:~$ sudo dmraid -r -c
ERROR: isw: seeking device "/dev/vda" to 18446744073708843520
ERROR: sil: seeking device "/dev/vda" to 18446744073709401600
no raid disks
ubuntu at ubuntu:~$ dmesg
ubuntu at ubuntu:~$

  -dann