| 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-2021-47050: memory: renesas-rpc-if: fix possible NULL pointer dereference of resource |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| memory: renesas-rpc-if: fix possible NULL pointer dereference of resource |
| |
| The platform_get_resource_byname() can return NULL which would be |
| immediately dereferenced by resource_size(). Instead dereference it |
| after validating the resource. |
| |
| Addresses-Coverity: Dereference null return value |
| |
| The Linux kernel CVE team has assigned CVE-2021-47050 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.9 with commit ca7d8b980b67f133317525c4273e144116ee1ae5 and fixed in 5.10.37 with commit 71bcc1b4a1743534d8abdcb57ff912e6bc390438 |
| Issue introduced in 5.9 with commit ca7d8b980b67f133317525c4273e144116ee1ae5 and fixed in 5.11.21 with commit e16acc3a37f09e18835dc5d8014942c2ef6ca957 |
| Issue introduced in 5.9 with commit ca7d8b980b67f133317525c4273e144116ee1ae5 and fixed in 5.12.4 with commit a74cb41af7dbe019e4096171f8bc641c7ce910ad |
| Issue introduced in 5.9 with commit ca7d8b980b67f133317525c4273e144116ee1ae5 and fixed in 5.13 with commit 59e27d7c94aa02da039b000d33c304c179395801 |
| |
| 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-2021-47050 |
| 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/memory/renesas-rpc-if.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/71bcc1b4a1743534d8abdcb57ff912e6bc390438 |
| https://git.kernel.org/stable/c/e16acc3a37f09e18835dc5d8014942c2ef6ca957 |
| https://git.kernel.org/stable/c/a74cb41af7dbe019e4096171f8bc641c7ce910ad |
| https://git.kernel.org/stable/c/59e27d7c94aa02da039b000d33c304c179395801 |
