linux-nv-oot

mirror of git://nv-tegra.nvidia.com/linux-nv-oot.git synced 2025-12-22 09:11:26 +03:00

Mahesh Kumar 472d0dfdf3 platform: dce: fix ipc_client_unregister race cond

This patch fixes a race condition between
tegra_dce_unregister_ipc_client and dce_client_ipc_wakeup.

If dce_client_ipc_wakeup is called just after unregistering
it'll result in accessing already freed data structures and
kernel crash. This patch adds a check to validate if the client_ipc
struct is valid before accessing its members.

Bug 4913921

Change-Id: Ie7f25379d7254d1f1ad4fb17baafee353f6d9eca
Signed-off-by: Mahesh Kumar <mahkumar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3239873
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Vinod Gopalakrishnakurup <vinodg@nvidia.com>
(cherry picked from commit 91a3402525e79bc59c7367743740c17a91e8752e)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3256954
(cherry picked from commit 6bce903d9e8c8de4c2017abc33191a983343a0c2)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3261855
Reviewed-by: svcacv <svcacv@nvidia.com>

2024-12-18 16:53:59 -08:00