| 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-2022-49678: soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe |
| |
| of_find_matching_node() returns a node pointer with refcount |
| incremented, we should use of_node_put() on it when not need anymore. |
| Add missing of_node_put() to avoid refcount leak. |
| |
| In brcmstb_init_sram, it pass dn to of_address_to_resource(), |
| of_address_to_resource() will call of_find_device_by_node() to take |
| reference, so we should release the reference returned by |
| of_find_matching_node(). |
| |
| The Linux kernel CVE team has assigned CVE-2022-49678 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.15 with commit 0b741b8234c86065fb6954d32d427b3f7e14756f and fixed in 4.19.250 with commit 4f5877bdf7b593e988f1924f4c3df6523f80b39c |
| Issue introduced in 4.15 with commit 0b741b8234c86065fb6954d32d427b3f7e14756f and fixed in 5.4.202 with commit 734a4d15142bb4c8ecad2d8ec70d7564e78ae34d |
| Issue introduced in 4.15 with commit 0b741b8234c86065fb6954d32d427b3f7e14756f and fixed in 5.10.127 with commit 30bbfeb480ae8b5ee43199d72417b232590440c2 |
| Issue introduced in 4.15 with commit 0b741b8234c86065fb6954d32d427b3f7e14756f and fixed in 5.15.51 with commit 10ba9d499a9fd82ed40897e734ba19870a879407 |
| Issue introduced in 4.15 with commit 0b741b8234c86065fb6954d32d427b3f7e14756f and fixed in 5.18.8 with commit dcafd5463d8f20c4f90ddc138a5738adb99f74c8 |
| Issue introduced in 4.15 with commit 0b741b8234c86065fb6954d32d427b3f7e14756f and fixed in 5.19 with commit 37d838de369b07b596c19ff3662bf0293fdb09ee |
| |
| 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-2022-49678 |
| 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/soc/bcm/brcmstb/pm/pm-arm.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/4f5877bdf7b593e988f1924f4c3df6523f80b39c |
| https://git.kernel.org/stable/c/734a4d15142bb4c8ecad2d8ec70d7564e78ae34d |
| https://git.kernel.org/stable/c/30bbfeb480ae8b5ee43199d72417b232590440c2 |
| https://git.kernel.org/stable/c/10ba9d499a9fd82ed40897e734ba19870a879407 |
| https://git.kernel.org/stable/c/dcafd5463d8f20c4f90ddc138a5738adb99f74c8 |
| https://git.kernel.org/stable/c/37d838de369b07b596c19ff3662bf0293fdb09ee |
