This is a note to let you know that I've just added the patch titled
net: fix rtnetlink IFF_PROMISC and IFF_ALLMULTI handling
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-fix-rtnetlink-iff_promisc-and-iff_allmulti-handling.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 032f2f5faa82cabb5459c3a6c7bbc75fbf22f9d0 Mon Sep 17 00:00:00 2001
From: Jiri Benc <[email protected]>
Date: Fri, 27 Jul 2012 02:58:22 +0000
Subject: net: fix rtnetlink IFF_PROMISC and IFF_ALLMULTI handling
From: Jiri Benc <[email protected]>
[ Upstream commit b1beb681cba5358f62e6187340660ade226a5fcc ]
When device flags are set using rtnetlink, IFF_PROMISC and IFF_ALLMULTI
flags are handled specially. Function dev_change_flags sets IFF_PROMISC and
IFF_ALLMULTI bits in dev->gflags according to the passed value but
do_setlink passes a result of rtnl_dev_combine_flags which takes those bits
from dev->flags.
This can be easily trigerred by doing:
tcpdump -i eth0 &
ip l s up eth0
ip sets IFF_UP flag in ifi_flags and ifi_change, which is combined with
IFF_PROMISC by rtnl_dev_combine_flags, causing __dev_change_flags to set
IFF_PROMISC in gflags.
Reported-by: Max Matveev <[email protected]>
Signed-off-by: Jiri Benc <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/core/rtnetlink.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -647,6 +647,12 @@ static void set_operstate(struct net_dev
}
}
+static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
+{
+ return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
+ (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
+}
+
static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
const struct ifinfomsg *ifm)
{
@@ -655,7 +661,7 @@ static unsigned int rtnl_dev_combine_fla
/* bugwards compatibility: ifi_change == 0 is treated as ~0 */
if (ifm->ifi_change)
flags = (flags & ifm->ifi_change) |
- (dev->flags & ~ifm->ifi_change);
+ (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
return flags;
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.0/net-fix-rtnetlink-iff_promisc-and-iff_allmulti-handling.patch
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