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Commit 76feba7d authored by Dan Carpenter's avatar Dan Carpenter Committed by Greg Kroah-Hartman
Browse files

ALSA: isa/wavefront: prevent some out of bound writes 



[ Upstream commit 84d7a4470dbac0dd9389050100b54a1625d04264 ]

"header->number" can be up to USHRT_MAX and it comes from the ioctl so
it needs to be capped.

Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent e3f904b9

sound/isa/wavefront/wavefront_synth.c

+9 −0
Original line number Diff line number Diff line
@@ -785,6 +785,9 @@ wavefront_send_patch (snd_wavefront_t *dev, wavefront_patch_info *header) 
	DPRINT (WF_DEBUG_LOAD_PATCH, "downloading patch %d\n",

				      header->number);



	if (header->number >= ARRAY_SIZE(dev->patch_status))

		return -EINVAL;



	dev->patch_status[header->number] |= WF_SLOT_FILLED;



	bptr = buf;
@@ -809,6 +812,9 @@ wavefront_send_program (snd_wavefront_t *dev, wavefront_patch_info *header) 
	DPRINT (WF_DEBUG_LOAD_PATCH, "downloading program %d\n",

		header->number);



	if (header->number >= ARRAY_SIZE(dev->prog_status))

		return -EINVAL;



	dev->prog_status[header->number] = WF_SLOT_USED;



	/* XXX need to zero existing SLOT_USED bit for program_status[i]
@@ -898,6 +904,9 @@ wavefront_send_sample (snd_wavefront_t *dev, 
		header->number = x;

	}



	if (header->number >= WF_MAX_SAMPLE)

		return -EINVAL;



	if (header->size) {



		/* XXX it's a debatable point whether or not RDONLY semantics