Thread (4 messages) flat view 4 messages, 4 authors, 2007-06-09

Re: [PATCH 2.6.22-rc4] ehea: Fixed possible kernel panic on VLAN packet recv

From: Michael Ellerman <hidden>
Date: 2007-06-07 00:35:22
Also in: linuxppc-dev, lkml

On Wed, 2007-06-06 at 20:53 +0200, Thomas Klein wrote:
quoted hunk ↗ jump to hunk
This patch fixes a possible kernel panic due to not checking the vlan group
when processing received VLAN packets and a malfunction in VLAN/hypervisor
registration.


Signed-off-by: Thomas Klein <redacted>
---


diff -Nurp -X dontdiff linux-2.6.22-rc4/drivers/net/ehea/ehea.h patched_kernel/drivers/net/ehea/ehea.h
--- linux-2.6.22-rc4/drivers/net/ehea/ehea.h	2007-06-05 02:57:25.000000000 +0200
+++ patched_kernel/drivers/net/ehea/ehea.h	2007-06-06 12:53:58.000000000 +0200
@@ -39,7 +39,7 @@
 #include <asm/io.h>
 
 #define DRV_NAME	"ehea"
-#define DRV_VERSION	"EHEA_0061"
+#define DRV_VERSION	"EHEA_0064"
 
 #define EHEA_MSG_DEFAULT (NETIF_MSG_LINK | NETIF_MSG_TIMER \
 	| NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
diff -Nurp -X dontdiff linux-2.6.22-rc4/drivers/net/ehea/ehea_main.c patched_kernel/drivers/net/ehea/ehea_main.c
--- linux-2.6.22-rc4/drivers/net/ehea/ehea_main.c	2007-06-05 02:57:25.000000000 +0200
+++ patched_kernel/drivers/net/ehea/ehea_main.c	2007-06-06 12:53:58.000000000 +0200
@@ -1947,7 +1945,7 @@ static void ehea_vlan_rx_add_vid(struct 
 	}
 
 	index = (vid / 64);
-	cb1->vlan_filter[index] |= ((u64)(1 << (vid & 0x3F)));
+	cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
 
 	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
 				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
@@ -1982,7 +1980,7 @@ static void ehea_vlan_rx_kill_vid(struct
 	}
 
 	index = (vid / 64);
-	cb1->vlan_filter[index] &= ~((u64)(1 << (vid & 0x3F)));
+	cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
These two seem ripe for splitting into some sort of helper routine.
Which would leave only one place to get it right.

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person

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