Description
In the Linux kernel, the following vulnerability has been resolved: w1: fix NULL pointer dereference in probe The w1_uart_probe() function calls w1_uart_serdev_open() (which includes devm_serdev_device_open()) before setting the client ops via serdev_device_set_client_ops(). This ordering can trigger a NULL pointer dereference in the serdev controller's receive_buf handler, as it assumes serdev->ops is valid when SERPORT_ACTIVE is set. This is similar to the issue fixed in commit 5e700b384ec1 ("platform/chrome: cros_ec_uart: properly fix race condition") where devm_serdev_device_open() was called before fully initializing the device. Fix the race by ensuring client ops are set before enabling the port via w1_uart_serdev_open().
Product status
a3c08804364e80328a9ffdac59bb26676b938195 (git) before 4f750b84628080ff0d67bf1af67a4967b740acf2
a3c08804364e80328a9ffdac59bb26676b938195 (git) before 64ab50577c59bb7049bec6b5c42d1c38e4029f29
a3c08804364e80328a9ffdac59bb26676b938195 (git) before cc6b0ec7cccbf66ef3621e9e93296b7bd1f52298
a3c08804364e80328a9ffdac59bb26676b938195 (git) before 0dd6770a72f138dabea9eae87f3da6ffa68f0d06
6.9
Any version before 6.9
6.12.23 (semver)
6.13.11 (semver)
6.14.2 (semver)
6.15 (original_commit_for_fix)
References
git.kernel.org/...c/4f750b84628080ff0d67bf1af67a4967b740acf2
git.kernel.org/...c/64ab50577c59bb7049bec6b5c42d1c38e4029f29
git.kernel.org/...c/cc6b0ec7cccbf66ef3621e9e93296b7bd1f52298
git.kernel.org/...c/0dd6770a72f138dabea9eae87f3da6ffa68f0d06