The patch titled
drivers/cpufreq/pcc-cpufreq.c: avoid NULL pointer dereference
has been removed from the -mm tree. Its filename was
drivers-cpufreq-pcc-cpufreqc-avoid-null-pointer-dereference.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: drivers/cpufreq/pcc-cpufreq.c: avoid NULL pointer dereference
From: Naga Chumbalkar <nagananda.chumbalkar@xxxxxx>
per_cpu(processors, n) can be NULL.
Loading CPUFreq modules[ 437.661360] BUG: unable to handle kernel NULL pointer
dereference at (null)
IP: [<ffffffffa0434314>] pcc_cpufreq_cpu_init+0x74/0x220 [pcc_cpufreq]
It's better to avoid the oops by failing the driver, and allowing the
system to boot.
Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@xxxxxx>
Cc: Dave Jones <davej@xxxxxxxxxxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/cpufreq/pcc-cpufreq.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN drivers/cpufreq/pcc-cpufreq.c~drivers-cpufreq-pcc-cpufreqc-avoid-null-pointer-dereference drivers/cpufreq/pcc-cpufreq.c
--- a/drivers/cpufreq/pcc-cpufreq.c~drivers-cpufreq-pcc-cpufreqc-avoid-null-pointer-dereference
+++ a/drivers/cpufreq/pcc-cpufreq.c
@@ -261,6 +261,9 @@ static int pcc_get_offset(int cpu)
pr = per_cpu(processors, cpu);
pcc_cpu_data = per_cpu_ptr(pcc_cpu_info, cpu);
+ if (!pr)
+ return -ENODEV;
+
status = acpi_evaluate_object(pr->handle, "PCCP", NULL, &buffer);
if (ACPI_FAILURE(status))
return -ENODEV;
_
Patches currently in -mm which might be from nagananda.chumbalkar@xxxxxx are
origin.patch
linux-next.patch
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