Re: [PATCH] vhost/vringh: reject zero-length indirect descriptor tables

[Fang Xieyan]

Hi Michael,

Yes, same fix - sorry. The October 21 posting is a duplicate
of the v2 I posted on September 26:

https://lore.kernel.org/virtualization/20260926160755.21485-1-fangxy@xxxxxxxxxxxx/

I resent it as a new patch instead of a v3.

The !len form is equivalent to v2's len < sizeof(struct
vring_desc) check when combined with the modulo check -
zero is the only length below one descriptor that is also
a multiple of the descriptor size.

The diagnostic change is to pass the byte-order converted
len instead of the raw desc->len, so the reported length is
correct when the vring byte order differs from the CPU byte
order.

Would you prefer that I send a v3 on the original v2 thread
with this diagnostic correction, or should I drop the
October 21 posting and leave v2 as is?

Thanks,
Fang