| 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-2025-21799: net: ethernet: ti: am65-cpsw: fix freeing IRQ in am65_cpsw_nuss_remove_tx_chns() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: ethernet: ti: am65-cpsw: fix freeing IRQ in am65_cpsw_nuss_remove_tx_chns() |
| |
| When getting the IRQ we use k3_udma_glue_tx_get_irq() which returns |
| negative error value on error. So not NULL check is not sufficient |
| to deteremine if IRQ is valid. Check that IRQ is greater then zero |
| to ensure it is valid. |
| |
| There is no issue at probe time but at runtime user can invoke |
| .set_channels which results in the following call chain. |
| am65_cpsw_set_channels() |
| am65_cpsw_nuss_update_tx_rx_chns() |
| am65_cpsw_nuss_remove_tx_chns() |
| am65_cpsw_nuss_init_tx_chns() |
| |
| At this point if am65_cpsw_nuss_init_tx_chns() fails due to |
| k3_udma_glue_tx_get_irq() then tx_chn->irq will be set to a |
| negative value. |
| |
| Then, at subsequent .set_channels with higher channel count we |
| will attempt to free an invalid IRQ in am65_cpsw_nuss_remove_tx_chns() |
| leading to a kernel warning. |
| |
| The issue is present in the original commit that introduced this driver, |
| although there, am65_cpsw_nuss_update_tx_rx_chns() existed as |
| am65_cpsw_nuss_update_tx_chns(). |
| |
| The Linux kernel CVE team has assigned CVE-2025-21799 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.7 with commit 93a76530316a3d8cc2d82c3deca48424fee92100 and fixed in 5.10.235 with commit 321990fdf4f1bb64e818c7140688bf33d129e48d |
| Issue introduced in 5.7 with commit 93a76530316a3d8cc2d82c3deca48424fee92100 and fixed in 5.15.179 with commit ed8c0300f302338c36edb06bca99051e5be6fb2f |
| Issue introduced in 5.7 with commit 93a76530316a3d8cc2d82c3deca48424fee92100 and fixed in 6.1.129 with commit aea5cca681d268f794fa2385f9ec26a5cce025cd |
| Issue introduced in 5.7 with commit 93a76530316a3d8cc2d82c3deca48424fee92100 and fixed in 6.6.76 with commit 88fd5db8c0073bd91d18391feb5741aeb0a2b475 |
| Issue introduced in 5.7 with commit 93a76530316a3d8cc2d82c3deca48424fee92100 and fixed in 6.12.13 with commit 8448c87b3af68bebca21e3136913f7f77e363515 |
| Issue introduced in 5.7 with commit 93a76530316a3d8cc2d82c3deca48424fee92100 and fixed in 6.13.2 with commit 8aae91ae1c65782a169ec070e023d4d269e5d6e6 |
| Issue introduced in 5.7 with commit 93a76530316a3d8cc2d82c3deca48424fee92100 and fixed in 6.14 with commit 4395a44acb15850e492dd1de9ec4b6479d96bc80 |
| |
| 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-2025-21799 |
| 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/am65-cpsw-nuss.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/321990fdf4f1bb64e818c7140688bf33d129e48d |
| https://git.kernel.org/stable/c/ed8c0300f302338c36edb06bca99051e5be6fb2f |
| https://git.kernel.org/stable/c/aea5cca681d268f794fa2385f9ec26a5cce025cd |
| https://git.kernel.org/stable/c/88fd5db8c0073bd91d18391feb5741aeb0a2b475 |
| https://git.kernel.org/stable/c/8448c87b3af68bebca21e3136913f7f77e363515 |
| https://git.kernel.org/stable/c/8aae91ae1c65782a169ec070e023d4d269e5d6e6 |
| https://git.kernel.org/stable/c/4395a44acb15850e492dd1de9ec4b6479d96bc80 |
