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| author | Aurelien Jacobs <aurel@gnuage.org> | 2012-01-07 12:15:16 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-12 11:35:43 -0800 |
| commit | 2643bcef53a08c09975861ebbed6d687571a2751 (patch) | |
| tree | 6550044ff87203993d93ce280f4c6ad9fd8a0d02 /drivers | |
| parent | 49ffa26eca87d3518ed88d3e6feebf1b80837a15 (diff) | |
| download | lwn-2643bcef53a08c09975861ebbed6d687571a2751.tar.gz lwn-2643bcef53a08c09975861ebbed6d687571a2751.zip | |
asix: fix infinite loop in rx_fixup()
commit 6c15d74defd38e7e7f8805392578b7a1d508097e upstream.
At this point if skb->len happens to be 2, the subsequant skb_pull(skb, 4)
call won't work and the skb->len won't be decreased and won't ever reach 0,
resulting in an infinite loop.
With an ASIX 88772 under heavy load, without this patch, rx_fixup() reaches
an infinite loop in less than a minute. With this patch applied,
no infinite loop even after hours of heavy load.
Signed-off-by: Aurelien Jacobs <aurel@gnuage.org>
Cc: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/usb/asix.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/usb/asix.c b/drivers/net/usb/asix.c index c50632e8658c..710557700095 100644 --- a/drivers/net/usb/asix.c +++ b/drivers/net/usb/asix.c @@ -371,7 +371,7 @@ static int asix_rx_fixup(struct usbnet *dev, struct sk_buff *skb) skb_pull(skb, (size + 1) & 0xfffe); - if (skb->len == 0) + if (skb->len < sizeof(header)) break; head = (u8 *) skb->data; |