Re: [PATCH] net: Fix potential NULL pointer dereference in __skb_try_recv_datagram

From	Eric Dumazet <eric.dumazet@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] net: Fix potential NULL pointer dereference in __skb_try_recv_datagram
Date	2016-01-05 15:50 +0100
Message-ID	<qNB5U-480-17@gated-at.bofh.it> (permalink)
References	(7 earlier) <qN9sZ-1w4-3@gated-at.bofh.it> <qNff3-5dA-5@gated-at.bofh.it> <qNxF0-1fC-23@gated-at.bofh.it> <qNACT-3VY-17@gated-at.bofh.it> <qNAWe-43s-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, 2016-01-05 at 15:34 +0100, Jacob Siverskog wrote:
> On Tue, Jan 5, 2016 at 3:14 PM, Eric Dumazet <eric.dumazet@gmail.com> wrote:

> >
> > You might build a kernel with KASAN support to get maybe more chances to
> > trigger the bug.
> >
> > ( https://www.kernel.org/doc/Documentation/kasan.txt )
> >
> 
> Ah. Doesn't seem to be supported on arm(32) unfortunately.

Then you could at least use standard debugging features :

CONFIG_SLAB=y
CONFIG_SLABINFO=y
CONFIG_DEBUG_SLAB=y
CONFIG_DEBUG_SLAB_LEAK=y

(Or equivalent SLUB options)

and

CONFIG_DEBUG_PAGEALLOC=y

(If arm(32) has CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y)



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Re: [PATCH] net: Fix potential NULL pointer dereference in __skb_try_recv_datagram Jacob Siverskog <jacob@teenage.engineering> - 2016-01-04 10:20 +0100
  Re: [PATCH] net: Fix potential NULL pointer dereference in  __skb_try_recv_datagram Eric Dumazet <eric.dumazet@gmail.com> - 2016-01-04 16:30 +0100
    Re: [PATCH] net: Fix potential NULL pointer dereference in __skb_try_recv_datagram Rainer Weikusat <rweikusat@mobileactivedefense.com> - 2016-01-04 17:20 +0100
      Re: [PATCH] net: Fix potential NULL pointer dereference in  __skb_try_recv_datagram Eric Dumazet <eric.dumazet@gmail.com> - 2016-01-04 17:50 +0100
    Re: [PATCH] net: Fix potential NULL pointer dereference in __skb_try_recv_datagram Jacob Siverskog <jacob@teenage.engineering> - 2016-01-05 12:10 +0100
      Re: [PATCH] net: Fix potential NULL pointer dereference in  __skb_try_recv_datagram Eric Dumazet <eric.dumazet@gmail.com> - 2016-01-05 15:20 +0100
        Re: [PATCH] net: Fix potential NULL pointer dereference in __skb_try_recv_datagram Jacob Siverskog <jacob@teenage.engineering> - 2016-01-05 15:40 +0100
          Re: [PATCH] net: Fix potential NULL pointer dereference in  __skb_try_recv_datagram Eric Dumazet <eric.dumazet@gmail.com> - 2016-01-05 15:50 +0100

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