blob: 6c07767e7713eb512086428a6a4533f26815fe5d [file] [log] [blame]
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Mon, 27 Jun 2016 21:06:51 +0200
Subject: ALSA: echoaudio: Fix memory allocation
commit 9c6795a9b3cbb56a9fbfaf43909c5c22999ba317 upstream.
'commpage_bak' is allocated with 'sizeof(struct echoaudio)' bytes.
We then copy 'sizeof(struct comm_page)' bytes in it.
On my system, smatch complains because one is 2960 and the other is 3072.
This would result in memory corruption or a oops.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
sound/pci/echoaudio/echoaudio.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/sound/pci/echoaudio/echoaudio.c
+++ b/sound/pci/echoaudio/echoaudio.c
@@ -2251,11 +2251,11 @@ static int snd_echo_resume(struct pci_de
DE_INIT(("resume start\n"));
pci_restore_state(pci);
- commpage_bak = kmalloc(sizeof(struct echoaudio), GFP_KERNEL);
+ commpage_bak = kmalloc(sizeof(*commpage), GFP_KERNEL);
if (commpage_bak == NULL)
return -ENOMEM;
commpage = chip->comm_page;
- memcpy(commpage_bak, commpage, sizeof(struct comm_page));
+ memcpy(commpage_bak, commpage, sizeof(*commpage));
err = init_hw(chip, chip->pci->device, chip->pci->subsystem_device);
if (err < 0) {