On 2018年01月30日 01:01, David Miller wrote:
From: Jason Wang <[email protected]> Date: Thu, 25 Jan 2018 15:31:42 +0800We try to allocate one more entry for lockless peeking. The adding operation may overflow which causes zero to be passed to kmalloc(). In this case, it returns ZERO_SIZE_PTR without any notice by ptr ring. Try to do producing or consuming on such ring will lead NULL dereference. Fix this detect and fail early. Fixes: bcecb4bbf88a ("net: ptr_ring: otherwise safe empty checks can overrun array bounds") Reported-by: [email protected] Cc: John Fastabend <[email protected]> Signed-off-by: Jason Wang <[email protected]>I'm dropping this because I am to understand that Michael Tsirkin's patch series covers this issue.
Yes.
Let me know if I still need to apply this. Thanks.
No need for this. Thanks
