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| author | Peter Maydell <peter.maydell@linaro.org> | 2014-02-26 17:19:58 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2014-02-26 17:19:58 +0000 |
| commit | cba933b2257ef0ad241756a0ff86bc0acda685ca (patch) | |
| tree | 35868822a83885717fbba7376769024a54b62e56 /hw/timer | |
| parent | 106a73b6d200035c5156f90b5f9b6a53d3adb43b (diff) | |
| download | qemu-cba933b2257ef0ad241756a0ff86bc0acda685ca.zip qemu-cba933b2257ef0ad241756a0ff86bc0acda685ca.tar.gz qemu-cba933b2257ef0ad241756a0ff86bc0acda685ca.tar.bz2 | |
hw/timer/arm_timer: Avoid array overrun for bad addresses
The integrator's timer read/write functions log an error for
bad addresses in guest accesses, but were falling through and
using an out of bounds array index rather than returning early.
Fix this.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Message-id: 1392647854-8067-4-git-send-email-peter.maydell@linaro.org
Cc: qemu-stable@nongnu.org
Diffstat (limited to 'hw/timer')
| -rw-r--r-- | hw/timer/arm_timer.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/hw/timer/arm_timer.c b/hw/timer/arm_timer.c index a47afde..fb0a45c 100644 --- a/hw/timer/arm_timer.c +++ b/hw/timer/arm_timer.c @@ -320,6 +320,7 @@ static uint64_t icp_pit_read(void *opaque, hwaddr offset, n = offset >> 8; if (n > 2) { qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad timer %d\n", __func__, n); + return 0; } return arm_timer_read(s->timer[n], offset & 0xff); @@ -334,6 +335,7 @@ static void icp_pit_write(void *opaque, hwaddr offset, n = offset >> 8; if (n > 2) { qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad timer %d\n", __func__, n); + return; } arm_timer_write(s->timer[n], offset & 0xff, value); |