On 11/14/25 12:09 AM, Tyler W. Ross wrote: > On Thursday, November 13th, 2025 at 9:35 PM, Tyler W. Ross > <[email protected]> wrote: > >> I tried a couple vanilla/stock kernels today, without success. >> >> Most notably, I built 6.17.8 from upstream using the Kconfig from the >> working Fedora 43 client in my lab ("config-6.17.5-300.fc43.x86_64"). >> >> Unfortunately, the rpc_xdr_overflow still occurs with this kernel. > > Quick addendum: > > I had not tried Debian 12, because CONFIG_RPCSEC_GSS_KRB5_ENCTYPES_AES_SHA2 > was not enabled in the shipped Kconfig. > > I just spun up a Debian 12 VM and installed the aforementioned > upstream 6.17.8 with Fedora 43 Kconfig kernel and confirmed the issue > also occurs on Debian 12. Then I would say further hunting for the broken commit is going to be fruitless. Adding the WARNs in net/sunrpc/xdr.c is a good next step so we see which XDR data item (assuming it's the same one every time) is failing to decode.
-- Chuck Lever
