ar5523: check NULL before memcpy() in ar5523_cmd()

[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / ath / ar5523 / ar5523.c

diff --git a/drivers/net/wireless/ath/ar5523/ar5523.c b/drivers/net/wireless/ath/ar5523/ar5523.c
index b94759daeaccf68c84d71b9938627bb6a2b1c793..da2d179430ca5a39e20239f0a7c6215730c6dde3 100644 (file)
--- a/drivers/net/wireless/ath/ar5523/ar5523.c
+++ b/drivers/net/wireless/ath/ar5523/ar5523.c
@@ -255,7 +255,8 @@ static int ar5523_cmd(struct ar5523 *ar, u32 code, const void *idata,
 
        if (flags & AR5523_CMD_FLAG_MAGIC)
                hdr->magic = cpu_to_be32(1 << 24);
-       memcpy(hdr + 1, idata, ilen);
+       if (ilen)
+               memcpy(hdr + 1, idata, ilen);
 
        cmd->odata = odata;
        cmd->olen = olen;