| 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-2022-48723: spi: uniphier: fix reference count leak in uniphier_spi_probe() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| spi: uniphier: fix reference count leak in uniphier_spi_probe() |
| |
| The issue happens in several error paths in uniphier_spi_probe(). |
| When either dma_get_slave_caps() or devm_spi_register_master() returns |
| an error code, the function forgets to decrease the refcount of both |
| `dma_rx` and `dma_tx` objects, which may lead to refcount leaks. |
| |
| Fix it by decrementing the reference count of specific objects in |
| those error paths. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48723 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.6 with commit 28d1dddc59f6b7fc085093e7c1e978b33f0caf4c and fixed in 5.10.99 with commit e895e067d73e154b1ebc84a124e00831e311d9b0 |
| Issue introduced in 5.6 with commit 28d1dddc59f6b7fc085093e7c1e978b33f0caf4c and fixed in 5.15.22 with commit dd00b4f8f768d81c3788a8ac88fdb3d745e55ea3 |
| Issue introduced in 5.6 with commit 28d1dddc59f6b7fc085093e7c1e978b33f0caf4c and fixed in 5.16.8 with commit 447c3d4046d7b54052d07d8b27e15e6edea5662c |
| Issue introduced in 5.6 with commit 28d1dddc59f6b7fc085093e7c1e978b33f0caf4c and fixed in 5.17 with commit 37c2c83ca4f1ef4b6908181ac98e18360af89b42 |
| |
| 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-2022-48723 |
| 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/spi/spi-uniphier.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/e895e067d73e154b1ebc84a124e00831e311d9b0 |
| https://git.kernel.org/stable/c/dd00b4f8f768d81c3788a8ac88fdb3d745e55ea3 |
| https://git.kernel.org/stable/c/447c3d4046d7b54052d07d8b27e15e6edea5662c |
| https://git.kernel.org/stable/c/37c2c83ca4f1ef4b6908181ac98e18360af89b42 |
