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authorJussi Kivilinna <jussi.kivilinna@mbnet.fi>2008-03-23 12:45:44 +0200
committerJeff Garzik <jeff@garzik.org>2008-03-25 23:42:06 -0400
commit9f5e60dd5ffca938da4cabc197af8b9405b5512e (patch)
treee6764734215126ccbcac1c7e52b0e48f117df7c0 /drivers/net/usb/rndis_host.c
parentb1186dee3e785679876f6b629609ec080842edda (diff)
rndis_host: fix oops when query for OID_GEN_PHYSICAL_MEDIUM fails
When query for OID_GEN_PHYSICAL_MEDIUM fails, uninitialized pointer 'phym' is being accessed in generic_rndis_bind(), resulting OOPS. Patch fixes phym to be initialized and setup correctly when rndis_query() for physical medium fails. Bug was introduced by following commit: commit 039ee17d1baabaa21783a0d5ab3e8c6d8c794bdf Author: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Date: Sun Jan 27 23:34:33 2008 +0200 Reported-by: Dmitri Monakhov <dmonakhov@openvz.org> Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/usb/rndis_host.c')
-rw-r--r--drivers/net/usb/rndis_host.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c
index 727547a2899..369c731114b 100644
--- a/drivers/net/usb/rndis_host.c
+++ b/drivers/net/usb/rndis_host.c
@@ -283,7 +283,7 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
struct rndis_set_c *set_c;
struct rndis_halt *halt;
} u;
- u32 tmp, *phym;
+ u32 tmp, phym_unspec, *phym;
int reply_len;
unsigned char *bp;
@@ -363,12 +363,15 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
goto halt_fail_and_release;
/* Check physical medium */
+ phym = NULL;
reply_len = sizeof *phym;
retval = rndis_query(dev, intf, u.buf, OID_GEN_PHYSICAL_MEDIUM,
0, (void **) &phym, &reply_len);
- if (retval != 0)
+ if (retval != 0 || !phym) {
/* OID is optional so don't fail here. */
- *phym = RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED;
+ phym_unspec = RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED;
+ phym = &phym_unspec;
+ }
if ((flags & FLAG_RNDIS_PHYM_WIRELESS) &&
*phym != RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
if (netif_msg_probe(dev))