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!