| 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-2021-47176: s390/dasd: add missing discipline function |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| s390/dasd: add missing discipline function |
| |
| Fix crash with illegal operation exception in dasd_device_tasklet. |
| Commit b72949328869 ("s390/dasd: Prepare for additional path event handling") |
| renamed the verify_path function for ECKD but not for FBA and DIAG. |
| This leads to a panic when the path verification function is called for a |
| FBA or DIAG device. |
| |
| Fix by defining a wrapper function for dasd_generic_verify_path(). |
| |
| The Linux kernel CVE team has assigned CVE-2021-47176 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.4.235 with commit 8bc5a76268fb334236296b4c185b8337e0d85473 and fixed in 5.4.237 with commit 6a16810068e70959bc1df686424aa35ce05578f1 |
| Issue introduced in 5.10.173 with commit 72aebdac390bf0dc04c0385d2db7ee522f4ffa3c and fixed in 5.10.175 with commit aa8579bc084673c651204f7cd0d6308a47dffc16 |
| Issue introduced in 5.11 with commit b72949328869dfd45f6452c2410647afd7db5f1a and fixed in 5.12.9 with commit a16be88a3d7e5efcb59a15edea87a8bd369630c6 |
| Issue introduced in 5.11 with commit b72949328869dfd45f6452c2410647afd7db5f1a and fixed in 5.13 with commit c0c8a8397fa8a74d04915f4d3d28cb4a5d401427 |
| |
| 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-2021-47176 |
| 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/s390/block/dasd_diag.c |
| drivers/s390/block/dasd_fba.c |
| drivers/s390/block/dasd_int.h |
| |
| |
| 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/6a16810068e70959bc1df686424aa35ce05578f1 |
| https://git.kernel.org/stable/c/aa8579bc084673c651204f7cd0d6308a47dffc16 |
| https://git.kernel.org/stable/c/a16be88a3d7e5efcb59a15edea87a8bd369630c6 |
| https://git.kernel.org/stable/c/c0c8a8397fa8a74d04915f4d3d28cb4a5d401427 |
