CVE-2023-52834

In the Linux kernel, the following vulnerability has been resolved:

atl1c: Work around the DMA RX overflow issue

This is based on alx driver commit 881d0327db37 (net: alx: Work around the DMA RX overflow issue).

The alx and atl1c drivers had RX overflow error which was why a custom allocator was created to avoid certain addresses. The simpler workaround then created for alx driver, but not for atl1c due to lack of tester.

Instead of using a custom allocator, check the allocated skb address and use skb_reserve() to move away from problematic 0x…fc0 address.

Tested on AR8131 on Acer 4540.

Affected Software

References

• https://git.kernel.org/stable/c/32f08b7b430ee01ec47d730f961a3306c1c7b6fb
• https://git.kernel.org/stable/c/54a6152da4993ec8e4b53dc3cf577f5a2c829afa
• https://git.kernel.org/stable/c/57e44ff9c2c9747b2b1a53556810b0e5192655d6
• https://git.kernel.org/stable/c/86565682e9053e5deb128193ea9e88531bbae9cf
• https://git.kernel.org/stable/c/c29a89b23f67ee592f4dee61f9d7efbf86d60315