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net/mlx5e: TC, Fix slab-out-of-bounds in parse_tc_actions 

esw_attr is only allocated if namespace is fdb.

BUG: KASAN: slab-out-of-bounds in parse_tc_actions+0xdc6/0x10e0 [mlx5_core]
Write of size 4 at addr ffff88815f185b04 by task tc/2135

CPU: 5 PID: 2135 Comm: tc Not tainted 6.1.0-rc2+ #2
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x57/0x7d
 print_report+0x170/0x471
 ? parse_tc_actions+0xdc6/0x10e0 [mlx5_core]
 kasan_report+0xbc/0xf0
 ? parse_tc_actions+0xdc6/0x10e0 [mlx5_core]
 parse_tc_actions+0xdc6/0x10e0 [mlx5_core]

Fixes: 94d651739e ("net/mlx5e: TC, Fix cloned flow attr instance dests are not zeroed")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Roi Dayan 2022-11-02 23:55:47 -07:00 committed by Saeed Mahameed
parent f4f4096b41
commit 7f1a6d4b9e
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
View File

@ -3633,10 +3633,14 @@ mlx5e_clone_flow_attr_for_post_act(struct mlx5_flow_attr *attr,
attr2->action = 0;
attr2->flags = 0;
attr2->parse_attr = parse_attr;
attr2->esw_attr->out_count = 0;
attr2->esw_attr->split_count = 0;
attr2->dest_chain = 0;
attr2->dest_ft = NULL;
if (ns_type == MLX5_FLOW_NAMESPACE_FDB) {
attr2->esw_attr->out_count = 0;
attr2->esw_attr->split_count = 0;
}
return attr2;
}