diff options
| author | Daniel De Graaf <dgdegra@tycho.nsa.gov> | 2011-11-28 11:49:09 -0500 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-12-16 11:25:54 -0500 |
| commit | c3b3f16d1bceb5ac5f21528f889810b4ac5a3596 (patch) | |
| tree | 1447aa5bd9e3ff8e682dde597485cbfc857e054f /drivers/xen | |
| parent | 9438ce9dbbf512fd717051284f568d5cb35e5cf1 (diff) | |
| download | linux-c3b3f16d1bceb5ac5f21528f889810b4ac5a3596.tar.bz2 | |
xen/events: prevent calling evtchn_get on invalid channels
The event channel number provided to evtchn_get can be provided by
userspace, so needs to be checked against the maximum number of event
channels prior to using it to index into evtchn_to_irq.
Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/events.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c index a3bcd6175f4a..e5e5812a1014 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -1104,6 +1104,9 @@ int evtchn_get(unsigned int evtchn) struct irq_info *info; int err = -ENOENT; + if (evtchn >= NR_EVENT_CHANNELS) + return -EINVAL; + mutex_lock(&irq_mapping_update_lock); irq = evtchn_to_irq[evtchn]; |