| 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-2021-47445: drm/msm: Fix null pointer dereference on pointer edp |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/msm: Fix null pointer dereference on pointer edp |
| |
| The initialization of pointer dev dereferences pointer edp before |
| edp is null checked, so there is a potential null pointer deference |
| issue. Fix this by only dereferencing edp after edp has been null |
| checked. |
| |
| Addresses-Coverity: ("Dereference before null check") |
| |
| The Linux kernel CVE team has assigned CVE-2021-47445 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.0 with commit ab5b0107ccf3821a6837b0f2819270d6fa0b278f and fixed in 4.4.290 with commit f175b9a83e5c252d7c74acddc792840016caae0a |
| Issue introduced in 4.0 with commit ab5b0107ccf3821a6837b0f2819270d6fa0b278f and fixed in 4.9.288 with commit bacac7d26849c8e903ceb7466d9ce8dc3c2797eb |
| Issue introduced in 4.0 with commit ab5b0107ccf3821a6837b0f2819270d6fa0b278f and fixed in 4.14.252 with commit 0cd063aa0a09822cc1620fc59a67fe2f9f6338ac |
| Issue introduced in 4.0 with commit ab5b0107ccf3821a6837b0f2819270d6fa0b278f and fixed in 4.19.213 with commit 7f642b93710b6b1119bdff90be01e6b5a2a5d669 |
| Issue introduced in 4.0 with commit ab5b0107ccf3821a6837b0f2819270d6fa0b278f and fixed in 5.4.155 with commit f302be08e3de94db8863a0b2958b2bb3e8e998e6 |
| Issue introduced in 4.0 with commit ab5b0107ccf3821a6837b0f2819270d6fa0b278f and fixed in 5.10.75 with commit 91a340768b012f5b910a203a805b97a345b3db37 |
| Issue introduced in 4.0 with commit ab5b0107ccf3821a6837b0f2819270d6fa0b278f and fixed in 5.14.14 with commit 46c8ddede0273d1d132beefa9de8b820326982be |
| Issue introduced in 4.0 with commit ab5b0107ccf3821a6837b0f2819270d6fa0b278f and fixed in 5.15 with commit 2133c4fc8e1348dcb752f267a143fe2254613b34 |
| |
| 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-2021-47445 |
| 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/gpu/drm/msm/edp/edp_ctrl.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/f175b9a83e5c252d7c74acddc792840016caae0a |
| https://git.kernel.org/stable/c/bacac7d26849c8e903ceb7466d9ce8dc3c2797eb |
| https://git.kernel.org/stable/c/0cd063aa0a09822cc1620fc59a67fe2f9f6338ac |
| https://git.kernel.org/stable/c/7f642b93710b6b1119bdff90be01e6b5a2a5d669 |
| https://git.kernel.org/stable/c/f302be08e3de94db8863a0b2958b2bb3e8e998e6 |
| https://git.kernel.org/stable/c/91a340768b012f5b910a203a805b97a345b3db37 |
| https://git.kernel.org/stable/c/46c8ddede0273d1d132beefa9de8b820326982be |
| https://git.kernel.org/stable/c/2133c4fc8e1348dcb752f267a143fe2254613b34 |
