On 02/14/2018 03:17 PM, Jason Wang wrote:
> There're several implications after commit 0bf7800f1799 ("ptr_ring:
> try vmalloc() when kmalloc() fails") with the using of vmalloc() since
> can't allow GFP_ATOMIC but mandate GFP_KERNEL. This will lead a WARN
> since cpumap try to call with GFP_ATOMIC. Fortunately, entry
> allocation of cpumap can only be done through syscall path which means
> GFP_ATOMIC is not necessary, so fixing this by replacing GFP_ATOMIC
> with GFP_KERNEL.
>
> Reported-by: syzbot+1a240cdb1f4cc8881...@syzkaller.appspotmail.com
> Fixes: 0bf7800f1799 ("ptr_ring: try vmalloc() when kmalloc() fails")
> Cc: Michal Hocko <mho...@kernel.org>
> Cc: Daniel Borkmann <dan...@iogearbox.net>
> Cc: Matthew Wilcox <wi...@infradead.org>
> Cc: Jesper Dangaard Brouer <bro...@redhat.com>
> Cc: a...@linux-foundation.org
> Cc: dhowe...@redhat.com
> Cc: han...@cmpxchg.org
> Signed-off-by: Jason Wang <jasow...@redhat.com>
Applied to bpf tree, thanks Jason!
