lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-Id: <20231225112915.3544581-1-alexious@zju.edu.cn> Date: Mon, 25 Dec 2023 19:29:14 +0800 From: Zhipeng Lu <alexious@....edu.cn> To: alexious@....edu.cn Cc: Simon Horman <horms@...nel.org>, Edward Cree <ecree.xilinx@...il.com>, Martin Habets <habetsm.xilinx@...il.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org, linux-net-drivers@....com, linux-kernel@...r.kernel.org Subject: [PATCH net] [v2] sfc: fix a double-free bug in efx_probe_filters 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@...nel.org> Reviewed-by: Edward Cree <ecree.xilinx@...il.com> Signed-off-by: Zhipeng Lu <alexious@....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(-) 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; -- 2.34.1
Powered by blists - more mailing lists