From: Alexei Starovoitov <a...@plumgrid.com>
Date: Wed, 10 Dec 2014 20:14:55 -0800
> 0day robot reported the following crash:
> [ 21.233581] BUG: unable to handle kernel NULL pointer dereference at
> 0000000000000007
> [ 21.234709] IP: [<ffffffff8156ebda>] sk_attach_bpf+0x39/0xc2
>
> It's due to bpf_prog_get() returning ERR_PTR.
> Check it properly.
>
> Reported-by: Fengguang Wu <fengguang...@intel.com>
> Fixes: 89aa075832b0 ("net: sock: allow eBPF programs to be attached to
> sockets")
> Signed-off-by: Alexei Starovoitov <a...@plumgrid.com>
> ---
> Silly mistake. I was sure I've checked this error path. Apparently not :(
Applied, thanks Alexei.
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