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().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
93a76530316a3d8cc2d82c3deca48424fee92100 to < 321990fdf4f1bb64e818c7140688bf33d129e48daffected93a76530316a3d8cc2d82c3deca48424fee92100 to < ed8c0300f302338c36edb06bca99051e5be6fb2faffected93a76530316a3d8cc2d82c3deca48424fee92100 to < aea5cca681d268f794fa2385f9ec26a5cce025cdaffected93a76530316a3d8cc2d82c3deca48424fee92100 to < 88fd5db8c0073bd91d18391feb5741aeb0a2b475affected93a76530316a3d8cc2d82c3deca48424fee92100 to < 8448c87b3af68bebca21e3136913f7f77e363515affected93a76530316a3d8cc2d82c3deca48424fee92100 to < 8aae91ae1c65782a169ec070e023d4d269e5d6e6affected93a76530316a3d8cc2d82c3deca48424fee92100 to < 4395a44acb15850e492dd1de9ec4b6479d96bc80affected
Linux Linux
Default version status: affected
5.7affected0 to < 5.7unaffected5.10.235 to ≤ 5.10.*unaffected5.15.179 to ≤ 5.15.*unaffected6.1.129 to ≤ 6.1.*unaffected6.6.76 to ≤ 6.6.*unaffected6.12.13 to ≤ 6.12.*unaffected6.13.2 to ≤ 6.13.*unaffected6.14 to ≤ *unaffected
References
- 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 ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html ↗