Description
In the Linux kernel, the following vulnerability has been resolved: serial: sc16is7xx: setup GPIO controller later in probe The GPIO controller component of the sc16is7xx driver is setup too early, which can result in a race condition where another device tries to utilise the GPIO lines before the sc16is7xx device has finished initialising. This issue manifests itself as an Oops when the GPIO lines are configured: Unable to handle kernel read from unreadable memory at virtual address ... pc : sc16is7xx_gpio_direction_output+0x68/0x108 [sc16is7xx] lr : sc16is7xx_gpio_direction_output+0x4c/0x108 [sc16is7xx] ... Call trace: sc16is7xx_gpio_direction_output+0x68/0x108 [sc16is7xx] gpiod_direction_output_raw_commit+0x64/0x318 gpiod_direction_output+0xb0/0x170 create_gpio_led+0xec/0x198 gpio_led_probe+0x16c/0x4f0 platform_drv_probe+0x5c/0xb0 really_probe+0xe8/0x448 driver_probe_device+0xe8/0x138 __device_attach_driver+0x94/0x118 bus_for_each_drv+0x8c/0xe0 __device_attach+0x100/0x1b8 device_initial_probe+0x28/0x38 bus_probe_device+0xa4/0xb0 deferred_probe_work_func+0x90/0xe0 process_one_work+0x1c4/0x480 worker_thread+0x54/0x430 kthread+0x138/0x150 ret_from_fork+0x10/0x1c This patch moves the setup of the GPIO controller functions to later in the probe function, ensuring the sc16is7xx device has already finished initialising by the time other devices try to make use of the GPIO lines. The error handling has also been reordered to reflect the new initialisation order.
Product status
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 17b96b5c19bec791b433890549e44ca523dc82aa
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 49b326ce8a686428d8cbb82ed74fc88ed3f95a51
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before f57c2164d082a36d177ab7fbf54c18970df89c22
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before b71ff206707855ce73c04794c76f7b678b2d4f72
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before c8f71b49ee4d28930c4a6798d1969fa91dc4ef3e
5.10.173 (semver)
5.15.100 (semver)
6.1.18 (semver)
6.2.5 (semver)
6.3 (original_commit_for_fix)
References
git.kernel.org/...c/17b96b5c19bec791b433890549e44ca523dc82aa
git.kernel.org/...c/49b326ce8a686428d8cbb82ed74fc88ed3f95a51
git.kernel.org/...c/f57c2164d082a36d177ab7fbf54c18970df89c22
git.kernel.org/...c/b71ff206707855ce73c04794c76f7b678b2d4f72
git.kernel.org/...c/c8f71b49ee4d28930c4a6798d1969fa91dc4ef3e
Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.
