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| author | Jeffrey Deans <jeffrey.deans@imgtec.com> | 2014-07-17 12:20:56 +0400 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-08-02 02:06:40 +0400 |
| commit | 6096e114f5f70d29d9e01e031f69d529b2193ab7 (patch) | |
| tree | a274820cc1a74ff159399d079e2d0277a60783f5 /arch/mips | |
| parent | b0a88ae50220b60d6e9686fc5f5a200151217037 (diff) | |
| download | linux-6096e114f5f70d29d9e01e031f69d529b2193ab7.tar.xz | |
MIPS: GIC: Prevent array overrun
A GIC interrupt which is declared as having a GIC_MAP_TO_NMI_MSK
mapping causes the cpu parameter to gic_setup_intr() to be increased
to 32, causing memory corruption when pcpu_masks[] is written to again
later in the function.
Signed-off-by: Jeffrey Deans <jeffrey.deans@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: stable@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7375/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/kernel/irq-gic.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/mips/kernel/irq-gic.c b/arch/mips/kernel/irq-gic.c index 71cf45a335b6..9932aef91abb 100644 --- a/arch/mips/kernel/irq-gic.c +++ b/arch/mips/kernel/irq-gic.c @@ -281,11 +281,13 @@ static void __init gic_setup_intr(unsigned int intr, unsigned int cpu, /* Setup Intr to Pin mapping */ if (pin & GIC_MAP_TO_NMI_MSK) { + int i; + GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_MAP_TO_PIN(intr)), pin); /* FIXME: hack to route NMI to all cpu's */ - for (cpu = 0; cpu < NR_CPUS; cpu += 32) { + for (i = 0; i < NR_CPUS; i += 32) { GICWRITE(GIC_REG_ADDR(SHARED, - GIC_SH_MAP_TO_VPE_REG_OFF(intr, cpu)), + GIC_SH_MAP_TO_VPE_REG_OFF(intr, i)), 0xffffffff); } } else { |