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strongarm: mask off high[31:28] bits from dir and state registers 

The high[31:28] bits of 'direction' and 'state' registers of
SA-1100/SA-1110 device are reserved. Setting them may lead to
OOB 's->handler[]' array access issue. Mask off [31:28] bits to
avoid it.

Reported-by: Moguofang <moguofang@huawei.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-id: 20181030114635.31232-1-ppandit@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Prasad J Pandit 2018-10-30 15:23:56 +00:00 committed by Peter Maydell
parent 22461bd2e5
commit 9a93b2fa0e
1 changed files with 2 additions and 2 deletions
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4
hw/arm/strongarm.c
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@ -587,12 +587,12 @@ static void strongarm_gpio_write(void *opaque, hwaddr offset,
switch (offset) { switch (offset) {
case GPDR: /* GPIO Pin-Direction registers */ case GPDR: /* GPIO Pin-Direction registers */
s->dir = value; s->dir = value & 0x0fffffff;
strongarm_gpio_handler_update(s); strongarm_gpio_handler_update(s);
break; break;
case GPSR: /* GPIO Pin-Output Set registers */ case GPSR: /* GPIO Pin-Output Set registers */
s->olevel |= value; s->olevel |= value & 0x0fffffff;
strongarm_gpio_handler_update(s); strongarm_gpio_handler_update(s);
break; break;