Commit 3201e656 authored by Jay Vosburgh's avatar Jay Vosburgh Committed by Jeff Garzik

bonding: Fix use after free in unregister path

	The following patch (based on a patch from Stephen Hemminger
<shemminger@linux-foundation.org>) removes use after free conditions in
the unregister path for the bonding master.  Without this patch, an
operation of the form "echo -bond0 > /sys/class/net/bonding_masters"
would trigger a NULL pointer dereference in sysfs.  I was not able to
induce the failure with the non-sysfs code path, but for consistency I
updated that code as well.

	I also did some testing of the bonding /proc file being open
while the bond is being deleted, and didn't see any problems there.
Signed-off-by: default avatarJay Vosburgh <fubar@us.ibm.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 3a2c892d
......@@ -4345,8 +4345,8 @@ static void bond_free_all(void)
bond_mc_list_destroy(bond);
/* Release the bonded slaves */
bond_release_all(bond_dev);
unregister_netdevice(bond_dev);
bond_deinit(bond_dev);
unregister_netdevice(bond_dev);
}
#ifdef CONFIG_PROC_FS
......
......@@ -164,9 +164,9 @@ static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t
printk(KERN_INFO DRV_NAME
": %s is being deleted...\n",
bond->dev->name);
unregister_netdevice(bond->dev);
bond_deinit(bond->dev);
bond_destroy_sysfs_entry(bond);
unregister_netdevice(bond->dev);
rtnl_unlock();
goto out;
}
......
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