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b43: debugfs SHM read buffer overrun fix

Fix possible buffer overrun.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Michael Buesch 17 år sedan
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1 ändrade filer med 1 tillägg och 1 borttagningar
  1. 1 1
      drivers/net/wireless/b43/debugfs.c

+ 1 - 1
drivers/net/wireless/b43/debugfs.c

@@ -128,7 +128,7 @@ static ssize_t shm_read_file(struct b43_wldev *dev,
 	__le16 *le16buf = (__le16 *)buf;
 
 	for (i = 0; i < 0x1000; i++) {
-		if (bufsize <= 0)
+		if (bufsize < sizeof(tmp))
 			break;
 		tmp = b43_shm_read16(dev, B43_SHM_SHARED, 2 * i);
 		le16buf[i] = cpu_to_le16(tmp);