On 15-10-19, 19:35, Rafael J. Wysocki wrote: > rom: Rafael J. Wysocki <[email protected]> > > If there are neither processor objects nor processor device objects > in the ACPI tables, the per-CPU processors table will not be > initialized and attempting to dereference pointers from there will > cause the kernel to crash. This happens in acpi_processor_ppc_init() > and acpi_thermal_cpufreq_init() after commit d15ce412737a ("ACPI: > cpufreq: Switch to QoS requests instead of cpufreq notifier") > which didn't add the requisite NULL pointer checks in there. > > Add the NULL pointer checks to acpi_processor_ppc_init() and > acpi_thermal_cpufreq_init(), and to the corresponding "exit" > routines. > > While at it, drop redundant return instructions from > acpi_processor_ppc_init() and acpi_thermal_cpufreq_init(). > > Fixes: d15ce412737a ("ACPI: cpufreq: Switch to QoS requests instead of > cpufreq notifier") > Reported-by: Srinivas Pandruvada <[email protected]> > Signed-off-by: Rafael J. Wysocki <[email protected]> > --- > drivers/acpi/processor_perflib.c | 10 ++++++---- > drivers/acpi/processor_thermal.c | 10 ++++++---- > 2 files changed, 12 insertions(+), 8 deletions(-)
Acked-by: Viresh Kumar <[email protected]> -- viresh
