From cd28aa2e056cd1ea79fc5f24eed0ce868c6cab5c Mon Sep 17 00:00:00 2001
From: Wang Xiayang <xywang.sjtu@sjtu.edu.cn>
Date: Wed, 31 Jul 2019 15:31:14 +0800
Subject: [PATCH 1/4] can: sja1000: force the string buffer NULL-terminated
strncpy() does not ensure NULL-termination when the input string size
equals to the destination buffer size IFNAMSIZ. The output string
'name' is passed to dev_info which relies on NULL-termination.
Use strlcpy() instead.
This issue is identified by a Coccinelle script.
Signed-off-by: Wang Xiayang <xywang.sjtu@sjtu.edu.cn>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
drivers/net/can/sja1000/peak_pcmcia.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/can/sja1000/peak_pcmcia.c b/drivers/net/can/sja1000/peak_pcmcia.c
index 185c7f7d38a4a..5e0d5e8101c86 100644
--- a/drivers/net/can/sja1000/peak_pcmcia.c
+++ b/drivers/net/can/sja1000/peak_pcmcia.c
@@ -479,7 +479,7 @@ static void pcan_free_channels(struct pcan_pccard *card)
if (!netdev)
continue;
- strncpy(name, netdev->name, IFNAMSIZ);
+ strlcpy(name, netdev->name, IFNAMSIZ);
unregister_sja1000dev(netdev);
From e787f19373b8a5fa24087800ed78314fd17b984a Mon Sep 17 00:00:00 2001
From: Wang Xiayang <xywang.sjtu@sjtu.edu.cn>
Date: Wed, 31 Jul 2019 15:25:59 +0800
Subject: [PATCH 2/4] can: peak_usb: force the string buffer NULL-terminated
strncpy() does not ensure NULL-termination when the input string size
equals to the destination buffer size IFNAMSIZ. The output string is
passed to dev_info() which relies on the NULL-termination.
Use strlcpy() instead.
This issue is identified by a Coccinelle script.
Signed-off-by: Wang Xiayang <xywang.sjtu@sjtu.edu.cn>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
drivers/net/can/usb/peak_usb/pcan_usb_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.c b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
index 22b9c8e6d040a..65dce642b86b5 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_core.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
@@ -855,7 +855,7 @@ static void peak_usb_disconnect(struct usb_interface *intf)
dev_prev_siblings = dev->prev_siblings;
dev->state &= ~PCAN_USB_STATE_CONNECTED;
- strncpy(name, netdev->name, IFNAMSIZ);
+ strlcpy(name, netdev->name, IFNAMSIZ);
unregister_netdev(netdev);
From 30a8beeb3042f49d0537b7050fd21b490166a3d9 Mon Sep 17 00:00:00 2001
From: Tomas Bortoli <tomasbortoli@gmail.com>
Date: Wed, 31 Jul 2019 10:54:47 -0400
Subject: [PATCH 3/4] can: peak_usb: pcan_usb_fd: Fix info-leaks to USB devices
Uninitialized Kernel memory can leak to USB devices.
Fix by using kzalloc() instead of kmalloc() on the affected buffers.
Signed-off-by: Tomas Bortoli <tomasbortoli@gmail.com>
Reported-by: syzbot+513e4d0985298538bf9b@syzkaller.appspotmail.com
Fixes: 0a25e1f4f185 ("can: peak_usb: add support for PEAK new CANFD USB adapters")
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
drivers/net/can/usb/peak_usb/pcan_usb_fd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
index 34761c3a62867..47cc1ff5b88e8 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
@@ -841,7 +841,7 @@ static int pcan_usb_fd_init(struct peak_usb_device *dev)
goto err_out;
/* allocate command buffer once for all for the interface */
- pdev->cmd_buffer_addr = kmalloc(PCAN_UFD_CMD_BUFFER_SIZE,
+ pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE,
GFP_KERNEL);
if (!pdev->cmd_buffer_addr)
goto err_out_1;
From ead16e53c2f0ed946d82d4037c630e2f60f4ab69 Mon Sep 17 00:00:00 2001
From: Tomas Bortoli <tomasbortoli@gmail.com>
Date: Wed, 31 Jul 2019 10:54:47 -0400
Subject: [PATCH 4/4] can: peak_usb: pcan_usb_pro: Fix info-leaks to USB
devices
Uninitialized Kernel memory can leak to USB devices.
Fix by using kzalloc() instead of kmalloc() on the affected buffers.
Signed-off-by: Tomas Bortoli <tomasbortoli@gmail.com>
Reported-by: syzbot+d6a5a1a3657b596ef132@syzkaller.appspotmail.com
Fixes: f14e22435a27 ("net: can: peak_usb: Do not do dma on the stack")
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
drivers/net/can/usb/peak_usb/pcan_usb_pro.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
index 178bb7cff0c1a..53cb2f72bdd05 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
@@ -494,7 +494,7 @@ static int pcan_usb_pro_drv_loaded(struct peak_usb_device *dev, int loaded)
u8 *buffer;
int err;
- buffer = kmalloc(PCAN_USBPRO_FCT_DRVLD_REQ_LEN, GFP_KERNEL);
+ buffer = kzalloc(PCAN_USBPRO_FCT_DRVLD_REQ_LEN, GFP_KERNEL);
if (!buffer)
return -ENOMEM;