| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1325959767-8075-1-git-send-email-aurel@gnuage.org> Date: Sat, 7 Jan 2012 19:09:27 +0100 From: Aurelien Jacobs <aurel@...age.org> To: netdev@...r.kernel.org Cc: Aurelien Jacobs <aurel@...age.org> Subject: [PATCH] asix: fix infinite loop in rx_fixup() 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@...age.org> --- 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 dbdca22..df2b08d 100644 --- a/drivers/net/usb/asix.c +++ b/drivers/net/usb/asix.c @@ -374,11 +374,11 @@ static int asix_rx_fixup(struct usbnet *dev, struct sk_buff *skb) return 0; } skb_pull(skb, (size + 1) & 0xfffe); - if (skb->len == 0) + if (skb->len < sizeof(header)) break; head = (u8 *) skb->data; memcpy(&header, head, sizeof(header)); le32_to_cpus(&header); -- 1.7.8.2 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists