Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3201e656ce56ed02e9501906c18ffe16ae350a52
Commit: 3201e656ce56ed02e9501906c18ffe16ae350a52
Parent: 3a2c892daaf54b31a70785c2821771e8094188ed
Author: Jay Vosburgh <[EMAIL PROTECTED]>
AuthorDate: Tue Jun 19 11:12:12 2007 -0700
Committer: Jeff Garzik <[EMAIL PROTECTED]>
CommitDate: Wed Jun 20 19:12:41 2007 -0400
bonding: Fix use after free in unregister path
The following patch (based on a patch from Stephen Hemminger
<[EMAIL PROTECTED]>) 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: Jay Vosburgh <[EMAIL PROTECTED]>
Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
---
drivers/net/bonding/bond_main.c | 2 +-
drivers/net/bonding/bond_sysfs.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 223517d..6287ffb 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -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
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index a122baa..60cccf2 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -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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