quoted

On 4/28/21 12:21 AM, Changheun Lee wrote:

quoted

Actually I don't know why NULL pointer dereference is occurred with Bart's
patch in blk_rq_map_kern(). And same problem have not occured yet in my
test environment with Bart's patch.
Maybe I missed something, or missunderstood?

The call trace that I shared on the linux-block mailing list was
encountered inside a VM that has a SATA disk attached to it and also a
SATA CD-ROM. Does replicating that setup allow to reproduce the NULL
pointer dereference that I reported?

Bart.

I can reproduce and see NULL pointer dereference in same call path without
your patch. But I can't reproduced it with your patch.
I tested in ubuntu via grub. SATA disk is attached only in my environment.
Actually I didn't test in VM yet. I'll try.

Thanks,

Changheun.

NULL pointer dereference is not produced in my VM environment too.

Dear Bart, Yi
I'll prepare v9 patch including Bart's modification.
Could you please test it on your environment?