Vulnerability CVE-2024-46799
Published: 2024-09-18

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

net: ethernet: ti: am65-cpsw: Fix NULL dereference on XDP_TX

If number of TX queues are set to 1 we get a NULL pointer
dereference during XDP_TX.

~# ethtool -L eth0 tx 1
~# ./xdp-trafficgen udp -A <ipv6-src> -a <ipv6-dst> eth0 -t 2
Transmitting on eth0 (ifindex 2)
[ 241.135257] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030

Fix this by using actual TX queues instead of max TX queues
when picking the TX channel in am65_cpsw_ndo_xdp_xmit().

 References:
https://git.kernel.org/stable/c/2e7189d2b1de51fc2567676cd4f96c0fe0960b9f
https://git.kernel.org/stable/c/0a50c35277f96481a5a6ed5faf347f282040c57d
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