Re: [PATCH] [v2] net/mlx5e: fix a potential double-free in fs_udp_create_groups

From: Saeed Mahameed
Date: Wed Dec 06 2023 - 16:53:13 EST


On 28 Nov 17:40, Dinghao Liu wrote:
When kcalloc() for ft->g succeeds but kvzalloc() for in fails,
fs_udp_create_groups() will free ft->g. However, its caller
fs_udp_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_udp_create_groups().

Fixes: 1c80bd684388 ("net/mlx5e: Introduce Flow Steering UDP API")
Signed-off-by: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
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Changelog:

v2: Setting ft->g to NULL instead of removing the kfree().
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Applied to net-mlx5.

- Saeed