From: Phong Tran <tranmanphong@gmail.com>
To: syzbot+8a3fc6674bbc3978ed4e@syzkaller.appspotmail.com
Cc: davem@davemloft.net, glider@google.com,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
lynxis@fe80.eu, marcel.ziswiler@toradex.com,
netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com,
yang.wei9@zte.com.cn, zhang.run@zte.com.cn,
skhan@linuxfoundation.org,
linux-kernel-mentees@lists.linuxfoundation.org,
Phong Tran <tranmanphong@gmail.com>
Subject: [PATCH] net: usb: asix: init MAC address buffers
Date: Mon, 1 Jul 2019 06:45:33 +0700 [thread overview]
Message-ID: <20190630234533.15089-1-tranmanphong@gmail.com> (raw)
In-Reply-To: <00000000000008f06d058a6e9783@google.com>
This is for fixing bug KMSAN: uninit-value in ax88772_bind
Tested by
https://groups.google.com/d/msg/syzkaller-bugs/aFQurGotng4/cFe9nxMCCwAJ
Reported-by: syzbot+8a3fc6674bbc3978ed4e@syzkaller.appspotmail.com
syzbot found the following crash on:
HEAD commit: f75e4cfe kmsan: use kmsan_handle_urb() in urb.c
git tree: kmsan
console output: https://syzkaller.appspot.com/x/log.txt?x=136d720ea00000
kernel config:
https://syzkaller.appspot.com/x/.config?x=602468164ccdc30a
dashboard link:
https://syzkaller.appspot.com/bug?extid=8a3fc6674bbc3978ed4e
compiler: clang version 9.0.0 (/home/glider/llvm/clang
06d00afa61eef8f7f501ebdb4e8612ea43ec2d78)
syz repro:
https://syzkaller.appspot.com/x/repro.syz?x=12788316a00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=120359aaa00000
==================================================================
BUG: KMSAN: uninit-value in is_valid_ether_addr
include/linux/etherdevice.h:200 [inline]
BUG: KMSAN: uninit-value in asix_set_netdev_dev_addr
drivers/net/usb/asix_devices.c:73 [inline]
BUG: KMSAN: uninit-value in ax88772_bind+0x93d/0x11e0
drivers/net/usb/asix_devices.c:724
CPU: 0 PID: 3348 Comm: kworker/0:2 Not tainted 5.1.0+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x191/0x1f0 lib/dump_stack.c:113
kmsan_report+0x130/0x2a0 mm/kmsan/kmsan.c:622
__msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:310
is_valid_ether_addr include/linux/etherdevice.h:200 [inline]
asix_set_netdev_dev_addr drivers/net/usb/asix_devices.c:73 [inline]
ax88772_bind+0x93d/0x11e0 drivers/net/usb/asix_devices.c:724
usbnet_probe+0x10f5/0x3940 drivers/net/usb/usbnet.c:1728
usb_probe_interface+0xd66/0x1320 drivers/usb/core/driver.c:361
really_probe+0xdae/0x1d80 drivers/base/dd.c:513
driver_probe_device+0x1b3/0x4f0 drivers/base/dd.c:671
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:778
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
__device_attach+0x454/0x730 drivers/base/dd.c:844
device_initial_probe+0x4a/0x60 drivers/base/dd.c:891
bus_probe_device+0x137/0x390 drivers/base/bus.c:514
device_add+0x288d/0x30e0 drivers/base/core.c:2106
usb_set_configuration+0x30dc/0x3750 drivers/usb/core/message.c:2027
generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210
usb_probe_device+0x14c/0x200 drivers/usb/core/driver.c:266
really_probe+0xdae/0x1d80 drivers/base/dd.c:513
driver_probe_device+0x1b3/0x4f0 drivers/base/dd.c:671
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:778
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
__device_attach+0x454/0x730 drivers/base/dd.c:844
device_initial_probe+0x4a/0x60 drivers/base/dd.c:891
bus_probe_device+0x137/0x390 drivers/base/bus.c:514
device_add+0x288d/0x30e0 drivers/base/core.c:2106
usb_new_device+0x23e5/0x2ff0 drivers/usb/core/hub.c:2534
hub_port_connect drivers/usb/core/hub.c:5089 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
port_event drivers/usb/core/hub.c:5350 [inline]
hub_event+0x48d1/0x7290 drivers/usb/core/hub.c:5432
process_one_work+0x1572/0x1f00 kernel/workqueue.c:2269
process_scheduled_works kernel/workqueue.c:2331 [inline]
worker_thread+0x189c/0x2460 kernel/workqueue.c:2417
kthread+0x4b5/0x4f0 kernel/kthread.c:254
ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
Signed-off-by: Phong Tran <tranmanphong@gmail.com>
---
drivers/net/usb/asix_devices.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c
index c9bc96310ed4..f514d19316b1 100644
--- a/drivers/net/usb/asix_devices.c
+++ b/drivers/net/usb/asix_devices.c
@@ -230,6 +230,7 @@ static int ax88172_bind(struct usbnet *dev, struct usb_interface *intf)
int i;
unsigned long gpio_bits = dev->driver_info->data;
+ memset(buf, 0, sizeof(buf));
usbnet_get_endpoints(dev,intf);
/* Toggle the GPIOs in a manufacturer/model specific way */
@@ -681,6 +682,7 @@ static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf)
u32 phyid;
struct asix_common_private *priv;
+ memset(buf, 0, sizeof(buf));
usbnet_get_endpoints(dev, intf);
/* Maybe the boot loader passed the MAC address via device tree */
@@ -1063,6 +1065,7 @@ static int ax88178_bind(struct usbnet *dev, struct usb_interface *intf)
int ret;
u8 buf[ETH_ALEN];
+ memset(buf, 0, sizeof(buf));
usbnet_get_endpoints(dev,intf);
/* Get the MAC address */
--
2.11.0
next prev parent reply other threads:[~2019-06-30 23:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-03 17:21 KMSAN: uninit-value in ax88772_bind syzbot
2019-06-30 23:45 ` Phong Tran [this message]
2019-07-01 15:29 ` [PATCH] net: usb: asix: init MAC address buffers Dan Williams
2019-07-02 0:02 ` Phong Tran
2019-07-02 0:10 ` [PATCH V2] " Phong Tran
2019-07-02 22:25 ` David Miller
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