On Tue, Oct 08, 2024 at 05:07:35PM GMT, Rik van Riel wrote: > The kzmalloc call in bpf_check can fail when memory is very fragmented, > which in turn can lead to an OOM kill. > > Use kvzmalloc to fall back to vmalloc when memory is too fragmented to > allocate an order 3 sized bpf verifier environment. > > Admittedly this is not a very common case, and only happens on systems > where memory has already been squeezed close to the limit, but this does > not seem like much of a hot path, and it's a simple enough fix. > > Signed-off-by: Rik van Riel <riel@xxxxxxxxxxx> It seems like a temporary allocation, so using kvmalloc* seems reasonable. Reviewed-by: Shakeel Butt <shakeel.butt@xxxxxxxxx>
