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Date: Tue, 28 Nov 2023 17:29:01 +0800
From: Dinghao Liu <>
Cc: Saeed Mahameed <>,
	Leon Romanovsky <>,
	"David S. Miller" <>,
	Eric Dumazet <>,
	Jakub Kicinski <>,
	Paolo Abeni <>,
	Rahul Rameshbabu <>,
	Zhengchao Shao <>,
	Simon Horman <>,
	Aya Levin <>,
	Tariq Toukan <>,,,
Subject: [PATCH] [v2] net/mlx5e: fix a potential double-free in fs_any_create_groups

When kcalloc() for ft->g succeeds but kvzalloc() for in fails,
fs_any_create_groups() will free ft->g. However, its caller
fs_any_create_table() will free ft->g again through calling
mlx5e_destroy_flow_table(), which will lead to a double-free.
Fix this by setting ft->g to NULL in fs_any_create_groups().

Fixes: 0f575c20bf06 ("net/mlx5e: Introduce Flow Steering ANY API")
Signed-off-by: Dinghao Liu <>


v2: Setting ft->g to NULL instead of removing the kfree().
 drivers/net/ethernet/mellanox/mlx5/core/en/fs_tt_redirect.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/fs_tt_redirect.c b/drivers/net/ethernet/mellanox/mlx5/core/en/fs_tt_redirect.c
index be83ad9db82a..6207ffe74233 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/fs_tt_redirect.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/fs_tt_redirect.c
@@ -435,6 +435,7 @@ static int fs_any_create_groups(struct mlx5e_flow_table *ft)
 	in = kvzalloc(inlen, GFP_KERNEL);
 	if  (!in || !ft->g) {
+		ft->g = NULL;
 		return -ENOMEM;

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