ALSA: sound/pci/asihpi: check adapter index in hpi_ioctl
The user-supplied index into the adapters array needs to be checked, or
an out-of-bounds kernel pointer could be accessed and used, leading to
potentially exploitable memory corruption.
Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/asihpi/hpioctl.c b/sound/pci/asihpi/hpioctl.c
index 26186be..cd624f1 100644
--- a/sound/pci/asihpi/hpioctl.c
+++ b/sound/pci/asihpi/hpioctl.c
@@ -156,6 +156,11 @@
goto out;
}
+ if (hm->h.adapter_index >= HPI_MAX_ADAPTERS) {
+ err = -EINVAL;
+ goto out;
+ }
+
pa = &adapters[hm->h.adapter_index];
hr->h.size = res_max_size;
if (hm->h.object == HPI_OBJ_SUBSYSTEM) {