diff mbox series

[net,v2] sfc: fix a double-free bug in efx_probe_filters

Message ID 20231225112915.3544581-1-alexious@zju.edu.cn
State New
Headers
Series [net,v2] sfc: fix a double-free bug in efx_probe_filters |

Commit Message

Zhipeng Lu Dec. 25, 2023, 11:29 a.m. UTC 
  In efx_probe_filters, the channel->rps_flow_id is freed in a
efx_for_each_channel marco  when success equals to 0.
However, after the following call chain:

ef100_net_open
  |-> efx_probe_filters
  |-> ef100_net_stop
        |-> efx_remove_filters

The channel->rps_flow_id is freed again in the efx_for_each_channel of
efx_remove_filters, triggering a double-free bug.

Fixes: a9dc3d5612ce ("sfc_ef100: RX filter table management and related gubbins")
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Edward Cree <ecree.xilinx@gmail.com>
Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>
---
Changelog:

v2: Correct the call-chain description in commit message and change
patch subject.
---
 drivers/net/ethernet/sfc/rx_common.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Comments

patchwork-bot+netdevbpf@kernel.org Jan. 3, 2024, 12:10 a.m. UTC | #1 
Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Mon, 25 Dec 2023 19:29:14 +0800 you wrote:
> In efx_probe_filters, the channel->rps_flow_id is freed in a
> efx_for_each_channel marco  when success equals to 0.
> However, after the following call chain:
> 
> ef100_net_open
>   |-> efx_probe_filters
>   |-> ef100_net_stop
>         |-> efx_remove_filters
> 
> [...]

Here is the summary with links:
  - [net,v2] sfc: fix a double-free bug in efx_probe_filters
    https://git.kernel.org/netdev/net/c/d5a306aedba3

You are awesome, thank you!
diff mbox series

Patch

diff --git a/drivers/net/ethernet/sfc/rx_common.c b/drivers/net/ethernet/sfc/rx_common.c
index d2f35ee15eff..fac227d372db 100644
--- a/drivers/net/ethernet/sfc/rx_common.c
+++ b/drivers/net/ethernet/sfc/rx_common.c
@@ -823,8 +823,10 @@  int efx_probe_filters(struct efx_nic *efx)
 		}
 
 		if (!success) {
-			efx_for_each_channel(channel, efx)
+			efx_for_each_channel(channel, efx) {
 				kfree(channel->rps_flow_id);
+				channel->rps_flow_id = NULL;
+			}
 			efx->type->filter_table_remove(efx);
 			rc = -ENOMEM;
 			goto out_unlock;