| 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-2021-47045: scsi: lpfc: Fix null pointer dereference in lpfc_prep_els_iocb() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| scsi: lpfc: Fix null pointer dereference in lpfc_prep_els_iocb() |
| |
| It is possible to call lpfc_issue_els_plogi() passing a did for which no |
| matching ndlp is found. A call is then made to lpfc_prep_els_iocb() with a |
| null pointer to a lpfc_nodelist structure resulting in a null pointer |
| dereference. |
| |
| Fix by returning an error status if no valid ndlp is found. Fix up comments |
| regarding ndlp reference counting. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47045 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.11 with commit 4430f7fd09ecb037570119e0aacbf0c17b8f98b2 and fixed in 5.11.21 with commit a09677de458d500b00701f6036baa423d9995408 |
| Issue introduced in 5.11 with commit 4430f7fd09ecb037570119e0aacbf0c17b8f98b2 and fixed in 5.12.4 with commit 9bdcfbed2a9fe24d2c7eaa1bad7c705e18de8cc7 |
| Issue introduced in 5.11 with commit 4430f7fd09ecb037570119e0aacbf0c17b8f98b2 and fixed in 5.13 with commit 8dd1c125f7f838abad009b64bff5f0a11afe3cb6 |
| |
| 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-2021-47045 |
| 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/scsi/lpfc/lpfc_els.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/a09677de458d500b00701f6036baa423d9995408 |
| https://git.kernel.org/stable/c/9bdcfbed2a9fe24d2c7eaa1bad7c705e18de8cc7 |
| https://git.kernel.org/stable/c/8dd1c125f7f838abad009b64bff5f0a11afe3cb6 |
