diff options
| author | Haggai Eran <haggai.eran@gmail.com> | 2015-05-23 23:13:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-03 09:28:59 -0700 |
| commit | 92c09183c74a03d85f2184992c9b0e3308c8bb8d (patch) | |
| tree | 961c1c322daa1d74a8fd73fbfa0e50b5b83d2995 | |
| parent | c79d02758654aeef5448f9b42952e699dd2c5463 (diff) | |
staging: rtl8712: prevent buffer overrun in recvbuf2recvframe
commit cab462140f8a183e3cca0b51c8b59ef715cb6148 upstream.
With an RTL8191SU USB adaptor, sometimes the hints for a fragmented
packet are set, but the packet length is too large. Allocate enough
space to prevent memory corruption and a resulting kernel panic [1].
[1] http://www.spinics.net/lists/linux-wireless/msg136546.html
Signed-off-by: Haggai Eran <haggai.eran@gmail.com>
ACKed-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/rtl8712/rtl8712_recv.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/staging/rtl8712/rtl8712_recv.c b/drivers/staging/rtl8712/rtl8712_recv.c index 50227b598e0c..fcb8c61b2884 100644 --- a/drivers/staging/rtl8712/rtl8712_recv.c +++ b/drivers/staging/rtl8712/rtl8712_recv.c @@ -1056,7 +1056,8 @@ static int recvbuf2recvframe(struct _adapter *padapter, struct sk_buff *pskb) /* for first fragment packet, driver need allocate 1536 + * drvinfo_sz + RXDESC_SIZE to defrag packet. */ if ((mf == 1) && (frag == 0)) - alloc_sz = 1658;/*1658+6=1664, 1664 is 128 alignment.*/ + /*1658+6=1664, 1664 is 128 alignment.*/ + alloc_sz = max_t(u16, tmp_len, 1658); else alloc_sz = tmp_len; /* 2 is for IP header 4 bytes alignment in QoS packet case. |