Description
In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_open/close(): fix memory leak The gs_usb driver appears to suffer from a malady common to many USB CAN adapter drivers in that it performs usb_alloc_coherent() to allocate a number of USB request blocks (URBs) for RX, and then later relies on usb_kill_anchored_urbs() to free them, but this doesn't actually free them. As a result, this may be leaking DMA memory that's been used by the driver. This commit is an adaptation of the techniques found in the esd_usb2 driver where a similar design pattern led to a memory leak. It explicitly frees the RX URBs and their DMA memory via a call to usb_free_coherent(). Since the RX URBs were allocated in the gs_can_open(), we remove them in gs_can_close() rather than in the disconnect function as was done in esd_usb2. For more information, see the 928150fad41b ("can: esd_usb2: fix memory leak").
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d08e973a77d128b25e01a08c34d89593fdf222da to < 339fa9f80d3b94177a7a459c6d115d3b56007d5aaffectedd08e973a77d128b25e01a08c34d89593fdf222da to < c1d806bc29ff7ffe0e2a023583c8720ed96cb0b0affectedd08e973a77d128b25e01a08c34d89593fdf222da to < d91492638b054f4a359621ef216242be5973ed6baffectedd08e973a77d128b25e01a08c34d89593fdf222da to < 6f655b5e13fa4b27e915b6c209ac0da74fd75963affectedd08e973a77d128b25e01a08c34d89593fdf222da to < d0b8e223998866b3e7b2895927d4e9689b0a80d8affectedd08e973a77d128b25e01a08c34d89593fdf222da to < 0e60230bc64355c80abe993d1719fdb318094e20affectedd08e973a77d128b25e01a08c34d89593fdf222da to < ffb6cc6601ec7c8fa963dcf76025df4a02f2cf5caffectedd08e973a77d128b25e01a08c34d89593fdf222da to < 2bda24ef95c0311ab93bda00db40486acf30bd0aaffected
Linux Linux
Default version status: affected
3.16affected0 to < 3.16unaffected4.9.323 to ≤ 4.9.*unaffected4.14.288 to ≤ 4.14.*unaffected4.19.252 to ≤ 4.19.*unaffected5.4.205 to ≤ 5.4.*unaffected5.10.130 to ≤ 5.10.*unaffected5.15.54 to ≤ 5.15.*unaffected5.18.11 to ≤ 5.18.*unaffected5.19 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/339fa9f80d3b94177a7a459c6d115d3b56007d5a ↗
- https://git.kernel.org/stable/c/c1d806bc29ff7ffe0e2a023583c8720ed96cb0b0 ↗
- https://git.kernel.org/stable/c/d91492638b054f4a359621ef216242be5973ed6b ↗
- https://git.kernel.org/stable/c/6f655b5e13fa4b27e915b6c209ac0da74fd75963 ↗
- https://git.kernel.org/stable/c/d0b8e223998866b3e7b2895927d4e9689b0a80d8 ↗
- https://git.kernel.org/stable/c/0e60230bc64355c80abe993d1719fdb318094e20 ↗
- https://git.kernel.org/stable/c/ffb6cc6601ec7c8fa963dcf76025df4a02f2cf5c ↗
- https://git.kernel.org/stable/c/2bda24ef95c0311ab93bda00db40486acf30bd0a ↗