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