This is a note to let you know that I've just added the patch titled
bonding: fix panic on non-ARPHRD_ETHER enslave failure
to the 4.3-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:
bonding-fix-panic-on-non-arphrd_ether-enslave-failure.patch
and it can be found in the queue-4.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Tue Nov 17 14:33:46 PST 2015
From: Jay Vosburgh <jay.vosburgh@xxxxxxxxxxxxx>
Date: Fri, 6 Nov 2015 17:23:23 -0800
Subject: bonding: fix panic on non-ARPHRD_ETHER enslave failure
From: Jay Vosburgh <jay.vosburgh@xxxxxxxxxxxxx>
[ Upstream commit 40baec225765c54eefa870530dd613bad9829bb7 ]
Since commit 7d5cd2ce529b, when bond_enslave fails on devices that
are not ARPHRD_ETHER, if needed, it resets the bonding device back to
ARPHRD_ETHER by calling ether_setup.
Unfortunately, ether_setup clobbers dev->flags, clearing IFF_UP
if the bond device is up, leaving it in a quasi-down state without
having actually gone through dev_close. For bonding, if any periodic
work queue items are active (miimon, arp_interval, etc), those will
remain running, as they are stopped by bond_close. At this point, if
the bonding module is unloaded or the bond is deleted, the system will
panic when the work function is called.
This panic is resolved by calling dev_close on the bond itself
prior to calling ether_setup.
Cc: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Jay Vosburgh <jay.vosburgh@xxxxxxxxxxxxx>
Fixes: 7d5cd2ce5292 ("bonding: correctly handle bonding type change on enslave failure")
Acked-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/bonding/bond_main.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1749,6 +1749,7 @@ err_undo_flags:
slave_dev->dev_addr))
eth_hw_addr_random(bond_dev);
if (bond_dev->type != ARPHRD_ETHER) {
+ dev_close(bond_dev);
ether_setup(bond_dev);
bond_dev->flags |= IFF_MASTER;
bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
Patches currently in stable-queue which might be from jay.vosburgh@xxxxxxxxxxxxx are
queue-4.3/bonding-fix-panic-on-non-arphrd_ether-enslave-failure.patch
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