3.2.82-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Tariq Toukan <tariqt@xxxxxxxxxxxx>
commit 2bb07e155bb3e0c722c806723f737cf8020961ef upstream.
Prevent using uninitialized or negative index when handling
steering entries.
Fixes: b12d93d63c32 ('mlx4: Add support for promiscuous mode in the new steering model.')
Signed-off-by: Tariq Toukan <tariqt@xxxxxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx4/mcg.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlx4/mcg.c
+++ b/drivers/net/ethernet/mellanox/mlx4/mcg.c
@@ -615,7 +615,7 @@ int mlx4_qp_attach_common(struct mlx4_de
struct mlx4_mgm *mgm;
u32 members_count;
u16 hash;
- int index, prev;
+ int index = -1, prev;
int link = 0;
int i;
int err;
@@ -693,7 +693,7 @@ int mlx4_qp_attach_common(struct mlx4_de
goto out;
out:
- if (prot == MLX4_PROT_ETH) {
+ if (prot == MLX4_PROT_ETH && index != -1) {
/* manage the steering entry for promisc mode */
if (new_entry)
new_steering_entry(dev, 0, port, steer, index, qp->qpn);
--
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