This is a note to let you know that I've just added the patch titled
i40e: use the safe hash table iterator when deleting mac filters
to the 4.14-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:
i40e-use-the-safe-hash-table-iterator-when-deleting-mac-filters.patch
and it can be found in the queue-4.14 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 Wed Dec 20 18:17:52 CET 2017
From: Lihong Yang <lihong.yang@xxxxxxxxx>
Date: Thu, 7 Sep 2017 08:05:46 -0400
Subject: i40e: use the safe hash table iterator when deleting mac filters
From: Lihong Yang <lihong.yang@xxxxxxxxx>
[ Upstream commit 784548c40d6f43eff2297220ad7800dc04be03c6 ]
This patch replaces hash_for_each function with hash_for_each_safe
when calling __i40e_del_filter. The hash_for_each_safe function is
the right one to use when iterating over a hash table to safely remove
a hash entry. Otherwise, incorrect values may be read from freed memory.
Detected by CoverityScan, CID 1402048 Read from pointer after free
Signed-off-by: Lihong Yang <lihong.yang@xxxxxxxxx>
Tested-by: Andrew Bowers <andrewx.bowers@xxxxxxxxx>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -2779,6 +2779,7 @@ int i40e_ndo_set_vf_mac(struct net_devic
struct i40e_mac_filter *f;
struct i40e_vf *vf;
int ret = 0;
+ struct hlist_node *h;
int bkt;
/* validate the request */
@@ -2817,7 +2818,7 @@ int i40e_ndo_set_vf_mac(struct net_devic
/* Delete all the filters for this VSI - we're going to kill it
* anyway.
*/
- hash_for_each(vsi->mac_filter_hash, bkt, f, hlist)
+ hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist)
__i40e_del_filter(vsi, f);
spin_unlock_bh(&vsi->mac_filter_hash_lock);
Patches currently in stable-queue which might be from lihong.yang@xxxxxxxxx are
queue-4.14/i40e-use-the-safe-hash-table-iterator-when-deleting-mac-filters.patch