On Tue, Nov 19, 2019 at 3:30 PM Francesco Ruggeri <fruggeri@xxxxxxxxxx> wrote: > > If I run > > for ((i=0; i<10; i++)) > do for ((j=0; j<1000000; j++)) > do cat /sys/firmware/acpi/tables/data/BERT >/dev/null > done & > done > > I see this panic in 5.3.11. I see a similar panic in 4.19.84. > The issue seems to be that acpi_os_map_cleanup does not execute under mutex_lock(&acpi_ioremap_lock), so more than one process may end up freeing the same map. I will prepare a patch. Francesco Ruggeri
