| 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-2021-47203: scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() |
| |
| When parsing the txq list in lpfc_drain_txq(), the driver attempts to pass |
| the requests to the adapter. If such an attempt fails, a local "fail_msg" |
| string is set and a log message output. The job is then added to a |
| completions list for cancellation. |
| |
| Processing of any further jobs from the txq list continues, but since |
| "fail_msg" remains set, jobs are added to the completions list regardless |
| of whether a wqe was passed to the adapter. If successfully added to |
| txcmplq, jobs are added to both lists resulting in list corruption. |
| |
| Fix by clearing the fail_msg string after adding a job to the completions |
| list. This stops the subsequent jobs from being added to the completions |
| list unless they had an appropriate failure. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47203 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.4.293 with commit ad4776b5eb2e58af1226847fcd3b4f6d051674dd |
| Fixed in 4.9.291 with commit ec70d80a8642900086447ba0cdc79e3f44d42e8f |
| Fixed in 4.14.256 with commit f05a0191b90156e539cccc189b9d87ca2a4d9305 |
| Fixed in 4.19.218 with commit b291d147d0268e93ad866f8bc820ea14497abc9b |
| Fixed in 5.4.162 with commit 16bcbfb56d759c25665f786e33ec633b9508a08f |
| Fixed in 5.10.82 with commit c097bd5a59162156d9c2077a2f58732ffbaa9fca |
| Fixed in 5.15.5 with commit 814d3610c4ce86e8cf285b2cdac0057a42e82de5 |
| Fixed in 5.16 with commit 99154581b05c8fb22607afb7c3d66c1bace6aa5d |
| |
| 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-2021-47203 |
| 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_sli.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/ad4776b5eb2e58af1226847fcd3b4f6d051674dd |
| https://git.kernel.org/stable/c/ec70d80a8642900086447ba0cdc79e3f44d42e8f |
| https://git.kernel.org/stable/c/f05a0191b90156e539cccc189b9d87ca2a4d9305 |
| https://git.kernel.org/stable/c/b291d147d0268e93ad866f8bc820ea14497abc9b |
| https://git.kernel.org/stable/c/16bcbfb56d759c25665f786e33ec633b9508a08f |
| https://git.kernel.org/stable/c/c097bd5a59162156d9c2077a2f58732ffbaa9fca |
| https://git.kernel.org/stable/c/814d3610c4ce86e8cf285b2cdac0057a42e82de5 |
| https://git.kernel.org/stable/c/99154581b05c8fb22607afb7c3d66c1bace6aa5d |
