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sfc: fix a double-free bug in efx_probe_filters

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[ Upstream commit d5a306aedba34e640b11d7026dbbafb78ee3a5f6 ]

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: a9dc3d5612 ("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>
Link: https://lore.kernel.org/r/20231225112915.3544581-1-alexious@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhipeng Lu 2023-12-25 19:29:14 +08:00 • committed by Greg Kroah-Hartman
parent 725d44e49f
commit e75715e1c2
1 changed files with 3 additions and 1 deletions
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4
drivers/net/ethernet/sfc/rx_common.c
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@ -820,8 +820,10 @@ int efx_probe_filters(struct efx_nic *efx)
} }
if (!success) { if (!success) {
efx_for_each_channel(channel, efx) efx_for_each_channel(channel, efx) {
kfree(channel->rps_flow_id); kfree(channel->rps_flow_id);
channel->rps_flow_id = NULL;
}
efx->type->filter_table_remove(efx); efx->type->filter_table_remove(efx);
rc = -ENOMEM; rc = -ENOMEM;
goto out_unlock; goto out_unlock;