Description
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Only put the call ref if one was acquired rxrpc_input_packet_on_conn() can process a to-client packet after the current client call on the channel has already been torn down. In that case chan->call is NULL, rxrpc_try_get_call() returns NULL and there is no reference to drop. The client-side implicit-end error path does not account for that and unconditionally calls rxrpc_put_call(). This turns a protocol error path into a kernel crash instead of rejecting the packet. Only drop the call reference if one was actually acquired. Keep the existing protocol error handling unchanged.
Product status
5e6ef4f1017c7f844e305283bbd8875af475e2fc (git) before b8f66447448d6c305a51413a67ec8ed26aa7d1dd
5e6ef4f1017c7f844e305283bbd8875af475e2fc (git) before 0c156aff8a2d4fa0d61db7837641975cf0e5452d
5e6ef4f1017c7f844e305283bbd8875af475e2fc (git) before 8299ca146489664e3c0c90a3b8900d8335b1ede4
5e6ef4f1017c7f844e305283bbd8875af475e2fc (git) before 9fb09861e2b8d1abfe2efaf260c9f1d30080ea38
5e6ef4f1017c7f844e305283bbd8875af475e2fc (git) before 6331f1b24a3e85465f6454e003a3e6c22005a5c5
6.2
Any version before 6.2
6.6.135 (semver)
6.12.82 (semver)
6.18.23 (semver)
6.19.13 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/b8f66447448d6c305a51413a67ec8ed26aa7d1dd
git.kernel.org/...c/0c156aff8a2d4fa0d61db7837641975cf0e5452d
git.kernel.org/...c/8299ca146489664e3c0c90a3b8900d8335b1ede4
git.kernel.org/...c/9fb09861e2b8d1abfe2efaf260c9f1d30080ea38
git.kernel.org/...c/6331f1b24a3e85465f6454e003a3e6c22005a5c5