| 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-2022-49192: drivers: ethernet: cpsw: fix panic when interrupt coaleceing is set via ethtool |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drivers: ethernet: cpsw: fix panic when interrupt coaleceing is set via ethtool |
| |
| cpsw_ethtool_begin directly returns the result of pm_runtime_get_sync |
| when successful. |
| pm_runtime_get_sync returns -error code on failure and 0 on successful |
| resume but also 1 when the device is already active. So the common case |
| for cpsw_ethtool_begin is to return 1. That leads to inconsistent calls |
| to pm_runtime_put in the call-chain so that pm_runtime_put is called |
| one too many times and as result leaving the cpsw dev behind suspended. |
| |
| The suspended cpsw dev leads to an access violation later on by |
| different parts of the cpsw driver. |
| |
| Fix this by calling the return-friendly pm_runtime_resume_and_get |
| function. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49192 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit d43c65b05b848e0b2db1a6c78b02c189da3a95b5 and fixed in 5.15.33 with commit 585dc196a08fccdcd1b7fcf473cf566b34c4b840 |
| Issue introduced in 5.15 with commit d43c65b05b848e0b2db1a6c78b02c189da3a95b5 and fixed in 5.16.19 with commit 459080fab12b23c0526026e5cedbf3fabb5457cc |
| Issue introduced in 5.15 with commit d43c65b05b848e0b2db1a6c78b02c189da3a95b5 and fixed in 5.17.2 with commit 30ad11bff021a94aff6dab1ec9236fdfd884fbff |
| Issue introduced in 5.15 with commit d43c65b05b848e0b2db1a6c78b02c189da3a95b5 and fixed in 5.18 with commit 2844e2434385819f674d1fb4130c308c50ba681e |
| |
| 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-2022-49192 |
| 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/net/ethernet/ti/cpsw_ethtool.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/585dc196a08fccdcd1b7fcf473cf566b34c4b840 |
| https://git.kernel.org/stable/c/459080fab12b23c0526026e5cedbf3fabb5457cc |
| https://git.kernel.org/stable/c/30ad11bff021a94aff6dab1ec9236fdfd884fbff |
| https://git.kernel.org/stable/c/2844e2434385819f674d1fb4130c308c50ba681e |
