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| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2014-04-14 09:42:01 +0200 |
|---|---|---|
| committer | Pawel Moll <pawel.moll@arm.com> | 2014-04-24 12:41:12 +0200 |
| commit | bb6dd5757c12e9f3f25da971f1ea45c777ae79ab (patch) | |
| tree | dee08962b88b6ec4a7ae5840e304ac3908aed08c /arch/arm/mach-vexpress/dcscb.c | |
| parent | clk: vexpress: NULL dereference on error path (diff) | |
| download | linux-bb6dd5757c12e9f3f25da971f1ea45c777ae79ab.tar.xz linux-bb6dd5757c12e9f3f25da971f1ea45c777ae79ab.zip | |
arm/mach-vexpress: array accessed out of bounds
dcscb_allcpus_mask is an array of size 2.
The index variable cluster has to be checked against this limit
before accessing the array.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Diffstat (limited to 'arch/arm/mach-vexpress/dcscb.c')
| -rw-r--r-- | arch/arm/mach-vexpress/dcscb.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm/mach-vexpress/dcscb.c b/arch/arm/mach-vexpress/dcscb.c index 788495d35cf9..30b993399ed7 100644 --- a/arch/arm/mach-vexpress/dcscb.c +++ b/arch/arm/mach-vexpress/dcscb.c @@ -51,12 +51,14 @@ static int dcscb_allcpus_mask[2]; static int dcscb_power_up(unsigned int cpu, unsigned int cluster) { unsigned int rst_hold, cpumask = (1 << cpu); - unsigned int all_mask = dcscb_allcpus_mask[cluster]; + unsigned int all_mask; pr_debug("%s: cpu %u cluster %u\n", __func__, cpu, cluster); if (cpu >= 4 || cluster >= 2) return -EINVAL; + all_mask = dcscb_allcpus_mask[cluster]; + /* * Since this is called with IRQs enabled, and no arch_spin_lock_irq * variant exists, we need to disable IRQs manually here. @@ -101,11 +103,12 @@ static void dcscb_power_down(void) cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0); cluster = MPIDR_AFFINITY_LEVEL(mpidr, 1); cpumask = (1 << cpu); - all_mask = dcscb_allcpus_mask[cluster]; pr_debug("%s: cpu %u cluster %u\n", __func__, cpu, cluster); BUG_ON(cpu >= 4 || cluster >= 2); + all_mask = dcscb_allcpus_mask[cluster]; + __mcpm_cpu_going_down(cpu, cluster); arch_spin_lock(&dcscb_lock); |