From: Pavel Skripkin <paskripkin@gmail.com>
To: mkrufky@linuxtv.org, mchehab@kernel.org
Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
Pavel Skripkin <paskripkin@gmail.com>,
stable@vger.kernel.org,
syzbot+7336195c02c1bd2f64e1@syzkaller.appspotmail.com
Subject: [PATCH v2] media: dvb-usb: fix wrong definition
Date: Fri, 7 May 2021 15:50:43 +0300 [thread overview]
Message-ID: <20210507125043.29825-1-paskripkin@gmail.com> (raw)
In-Reply-To: <20210506121211.8556-1-paskripkin@gmail.com>
syzbot reported WARNING in vmalloc. The problem
was in zero size passed to vmalloc.
The root case was in wrong cxusb_bluebird_lgz201_properties
definition. adapter array has only 1 entry, but num_adapters was
2.
Call Trace:
__vmalloc_node mm/vmalloc.c:2963 [inline]
vmalloc+0x67/0x80 mm/vmalloc.c:2996
dvb_dmx_init+0xe4/0xb90 drivers/media/dvb-core/dvb_demux.c:1251
dvb_usb_adapter_dvb_init+0x564/0x860 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:184
dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:86 [inline]
dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:184 [inline]
dvb_usb_device_init.cold+0xc94/0x146e drivers/media/usb/dvb-usb/dvb-usb-init.c:308
cxusb_probe+0x159/0x5e0 drivers/media/usb/dvb-usb/cxusb.c:1634
Fixes: 4d43e13f723e ("V4L/DVB (4643): Multi-input patch for DVB-USB device")
Cc: stable@vger.kernel.org
Reported-by: syzbot+7336195c02c1bd2f64e1@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
----
Changes in v2:
Added Fixes tag.
Fixed typos in commit message
---
drivers/media/usb/dvb-usb/cxusb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/usb/dvb-usb/cxusb.c b/drivers/media/usb/dvb-usb/cxusb.c
index 761992ad05e2..7707de7bae7c 100644
--- a/drivers/media/usb/dvb-usb/cxusb.c
+++ b/drivers/media/usb/dvb-usb/cxusb.c
@@ -1947,7 +1947,7 @@ static struct dvb_usb_device_properties cxusb_bluebird_lgz201_properties = {
.size_of_priv = sizeof(struct cxusb_state),
- .num_adapters = 2,
+ .num_adapters = 1,
.adapter = {
{
.num_frontends = 1,
--
2.31.1
prev parent reply other threads:[~2021-05-07 12:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-06 12:12 [PATCH] media: dvb-usb: fix wrong definition Pavel Skripkin
2021-05-07 12:50 ` Pavel Skripkin [this message]
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