| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2022-49661: can: gs_usb: gs_usb_open/close(): fix memory leak |
| |
| 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"). |
| |
| The Linux kernel CVE team has assigned CVE-2022-49661 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.16 with commit d08e973a77d128b25e01a08c34d89593fdf222da and fixed in 4.9.323 with commit 339fa9f80d3b94177a7a459c6d115d3b56007d5a |
| Issue introduced in 3.16 with commit d08e973a77d128b25e01a08c34d89593fdf222da and fixed in 4.14.288 with commit c1d806bc29ff7ffe0e2a023583c8720ed96cb0b0 |
| Issue introduced in 3.16 with commit d08e973a77d128b25e01a08c34d89593fdf222da and fixed in 4.19.252 with commit d91492638b054f4a359621ef216242be5973ed6b |
| Issue introduced in 3.16 with commit d08e973a77d128b25e01a08c34d89593fdf222da and fixed in 5.4.205 with commit 6f655b5e13fa4b27e915b6c209ac0da74fd75963 |
| Issue introduced in 3.16 with commit d08e973a77d128b25e01a08c34d89593fdf222da and fixed in 5.10.130 with commit d0b8e223998866b3e7b2895927d4e9689b0a80d8 |
| Issue introduced in 3.16 with commit d08e973a77d128b25e01a08c34d89593fdf222da and fixed in 5.15.54 with commit 0e60230bc64355c80abe993d1719fdb318094e20 |
| Issue introduced in 3.16 with commit d08e973a77d128b25e01a08c34d89593fdf222da and fixed in 5.18.11 with commit ffb6cc6601ec7c8fa963dcf76025df4a02f2cf5c |
| Issue introduced in 3.16 with commit d08e973a77d128b25e01a08c34d89593fdf222da and fixed in 5.19 with commit 2bda24ef95c0311ab93bda00db40486acf30bd0a |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2022-49661 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/net/can/usb/gs_usb.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| 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 |
