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ALSA: sound/pci/asihpi: check adapter index in hpi_ioctl

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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>
This commit is contained in:
Dan Rosenberg 2011-03-17 18:32:24 -04:00 committed by Takashi Iwai
parent 98d21df431
commit 4a122c10fb
1 changed files with 5 additions and 0 deletions
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5
sound/pci/asihpi/hpioctl.c
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@ -156,6 +156,11 @@ long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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) {