| 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-2021-47003: dmaengine: idxd: Fix potential null dereference on pointer status |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| dmaengine: idxd: Fix potential null dereference on pointer status |
| |
| There are calls to idxd_cmd_exec that pass a null status pointer however |
| a recent commit has added an assignment to *status that can end up |
| with a null pointer dereference. The function expects a null status |
| pointer sometimes as there is a later assignment to *status where |
| status is first null checked. Fix the issue by null checking status |
| before making the assignment. |
| |
| Addresses-Coverity: ("Explicit null dereferenced") |
| |
| The Linux kernel CVE team has assigned CVE-2021-47003 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10.17 with commit 40e3b5c128645d2ddad12310c7be98758cafb2b0 and fixed in 5.10.38 with commit 5756f757c72501ef1a16f5f63f940623044180e9 |
| Issue introduced in 5.11 with commit 89e3becd8f821e507052e012d2559dcda59f538e and fixed in 5.11.22 with commit 2280b4cc29d8cdd2be3d1b2d1ea4f958e2131c97 |
| Issue introduced in 5.11 with commit 89e3becd8f821e507052e012d2559dcda59f538e and fixed in 5.12.5 with commit 7bc402f843e7817a4a808e7b9ab0bcd7ffd55bfa |
| Issue introduced in 5.11 with commit 89e3becd8f821e507052e012d2559dcda59f538e and fixed in 5.13 with commit 28ac8e03c43dfc6a703aa420d18222540b801120 |
| |
| 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-2021-47003 |
| 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/dma/idxd/device.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/5756f757c72501ef1a16f5f63f940623044180e9 |
| https://git.kernel.org/stable/c/2280b4cc29d8cdd2be3d1b2d1ea4f958e2131c97 |
| https://git.kernel.org/stable/c/7bc402f843e7817a4a808e7b9ab0bcd7ffd55bfa |
| https://git.kernel.org/stable/c/28ac8e03c43dfc6a703aa420d18222540b801120 |
