On Tue, Jan 6, 2026 at 6:22 PM Jakub Kicinski kuba@kernel.org wrote:
On Mon, 5 Jan 2026 15:25:02 -0800 Joshua Washington wrote:
This series fixes a kernel panic in the GVE driver caused by out-of-bounds array access when the network stack provides an invalid TX queue index.
Do you know how? I seem to recall we had such issues due to bugs in the qdisc layer, most of which were fixed.
Fixing this at the source, if possible, would be far preferable to sprinkling this condition to all the drivers.
That matches our observation—we have encountered this panic on older kernels (specifically Rocky Linux 8) but have not been able to reproduce it on recent upstream kernels.
Could you point us to the specific qdisc fixes you recall? We'd like to verify if the issue we are seeing on the older kernel is indeed one of those known/fixed bugs.
If it turns out this is fully resolved in the core network stack upstream, we can drop this patch for the mainline driver. However, if there is ambiguity, do you think there is value in keeping this check to prevent the driver from crashing on invalid input?
Thanks, Ankit Garg