Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: Input: sur40 - fix input device registration ordering In sur40_probe(), input_register_device() was previously called early before the V4L2 video device and vb2_queue components were fully initialized. If userspace opened the input device immediately upon registration, sur40_open() would trigger and start the sur40_poll() worker thread. This worker thread invokes sur40_process_video() and accesses the uninitialized vb2_queue structure, leading to a data race and potential system crash. Furthermore, if V4L2 or video registration failed after input_register_device() succeeded, the error path fell through to calling input_free_device() on a successfully registered device instead of input_unregister_device(), corrupting input core state. Move input_register_device() to the very end of sur40_probe(). This ensures the V4L2 and video queue structures are fully initialized before polling can start, and naturally resolves the error path bug since input_free_device() is now only called when input registration has not yet occurred. To maintain strict LIFO (Last-In, First-Out) teardown ordering, also move input_unregister_device() to the very beginning of sur40_disconnect(). This guarantees that the input polling worker thread is stopped before V4L2 video components or control handlers are unregistered.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e831cd251fb91d6c25352d322743db0d17ea11dd before cd4ecce2fd87760c0ad9a9d28c9fc62ea1dbfd3d; affected e831cd251fb91d6c25352d322743db0d17ea11dd before dab741c9da72102a37cc1020a929051b7c45f9fb; affected e831cd251fb91d6c25352d322743db0d17ea11dd before 764b507be7b51787e1f577ca3bf0bab7efe81ff8; affected e831cd251fb91d6c25352d322743db0d17ea11dd before 3e8ed76a4f3572e637653f0654cccdf617903231; affected e831cd251fb91d6c25352d322743db0d17ea11dd before 83aa12f9f2468a4fbef027c09224dc1011850fb0; affected e831cd251fb91d6c25352d322743db0d17ea11dd before 5c1c5227c93f18cd329dd754b4df5e0e2daece1e; affected e831cd251fb91d6c25352d322743db0d17ea11dd before beb9b0bd6e6e23f5e9e42b7ef890a50f57f1f3aa; affected e831cd251fb91d6c25352d322743db0d17ea11dd before 9da976eb649c9e2f588a4499410e4d8af687925f |
| Linux / Linux | affected 4.1; unaffected 0 before 4.1; unaffected 5.10.266 through 5.10.*; unaffected 5.15.217 through 5.15.*; unaffected 6.1.184 through 6.1.*; unaffected 6.6.153 through 6.6.*; unaffected 6.12.105 through 6.12.*; unaffected 6.18.46 through 6.18.*; unaffected 7.1.10 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/cd4ecce2fd87760c0ad9a9d28c9fc62ea1dbfd3d
- https://git.kernel.org/stable/c/dab741c9da72102a37cc1020a929051b7c45f9fb
- https://git.kernel.org/stable/c/764b507be7b51787e1f577ca3bf0bab7efe81ff8
- https://git.kernel.org/stable/c/3e8ed76a4f3572e637653f0654cccdf617903231
- https://git.kernel.org/stable/c/83aa12f9f2468a4fbef027c09224dc1011850fb0
- https://git.kernel.org/stable/c/5c1c5227c93f18cd329dd754b4df5e0e2daece1e
- https://git.kernel.org/stable/c/beb9b0bd6e6e23f5e9e42b7ef890a50f57f1f3aa
- https://git.kernel.org/stable/c/9da976eb649c9e2f588a4499410e4d8af687925f