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* [PATCH] staging/wlan-ng: Remove all strcpy() uses in favor of strscpy()
@ 2021-07-17 15:20 Len Baker
  0 siblings, 0 replies; only message in thread
From: Len Baker @ 2021-07-17 15:20 UTC (permalink / raw)
  To: Greg Kroah-Hartman; +Cc: Len Baker, linux-staging, linux-kernel

strcpy() performs no bounds checking on the destination buffer. This
could result in linear overflows beyond the end of the buffer, leading
to all kinds of misbehaviors. The safe replacement is strscpy().

Signed-off-by: Len Baker <len.baker@gmx.com>
---
 drivers/staging/wlan-ng/prism2fw.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/wlan-ng/prism2fw.c b/drivers/staging/wlan-ng/prism2fw.c
index 94800c007162..02a2191d5c4d 100644
--- a/drivers/staging/wlan-ng/prism2fw.c
+++ b/drivers/staging/wlan-ng/prism2fw.c
@@ -296,7 +296,7 @@ static int prism2_fwapply(const struct ihex_binrec *rfptr,
 	memset(&getmsg, 0, sizeof(getmsg));
 	getmsg.msgcode = DIDMSG_DOT11REQ_MIBGET;
 	getmsg.msglen = sizeof(getmsg);
-	strcpy(getmsg.devname, wlandev->name);
+	strscpy(getmsg.devname, wlandev->name, sizeof(getmsg.devname));

 	getmsg.mibattribute.did = DIDMSG_DOT11REQ_MIBGET_MIBATTRIBUTE;
 	getmsg.mibattribute.status = P80211ENUM_msgitem_status_data_ok;
@@ -786,7 +786,7 @@ static int read_cardpda(struct pda *pda, struct wlandevice *wlandev)
 	/* set up the msg */
 	msg->msgcode = DIDMSG_P2REQ_READPDA;
 	msg->msglen = sizeof(msg);
-	strcpy(msg->devname, wlandev->name);
+	strscpy(msg->devname, wlandev->name, sizeof(msg->devname));
 	msg->pda.did = DIDMSG_P2REQ_READPDA_PDA;
 	msg->pda.len = HFA384x_PDA_LEN_MAX;
 	msg->pda.status = P80211ENUM_msgitem_status_no_value;
@@ -1017,7 +1017,7 @@ static int writeimage(struct wlandevice *wlandev, struct imgchunk *fchunk,
 	}

 	/* Initialize the messages */
-	strcpy(rstmsg->devname, wlandev->name);
+	strscpy(rstmsg->devname, wlandev->name, sizeof(rstmsg->devname));
 	rstmsg->msgcode = DIDMSG_P2REQ_RAMDL_STATE;
 	rstmsg->msglen = sizeof(*rstmsg);
 	rstmsg->enable.did = DIDMSG_P2REQ_RAMDL_STATE_ENABLE;
@@ -1030,7 +1030,7 @@ static int writeimage(struct wlandevice *wlandev, struct imgchunk *fchunk,
 	rstmsg->exeaddr.len = sizeof(u32);
 	rstmsg->resultcode.len = sizeof(u32);

-	strcpy(rwrmsg->devname, wlandev->name);
+	strscpy(rwrmsg->devname, wlandev->name, sizeof(rwrmsg->devname));
 	rwrmsg->msgcode = DIDMSG_P2REQ_RAMDL_WRITE;
 	rwrmsg->msglen = sizeof(*rwrmsg);
 	rwrmsg->addr.did = DIDMSG_P2REQ_RAMDL_WRITE_ADDR;
--
2.25.1


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2021-07-17 15:20 [PATCH] staging/wlan-ng: Remove all strcpy() uses in favor of strscpy() Len Baker

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