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linux-next/drivers/infiniband
Bernd Schubert 22cfb0bf67 IPoIB: Fix possible NULL dereference in ipoib_start_xmit()
Fix a bug introduced in 69cce1d140 ("net: Abstract dst->neighbour
accesses behind helpers.") where we might dereference skb_dst(skb)
even if it is NULL, which causes:

    [  240.944030] BUG: unable to handle kernel NULL pointer dereference at 0000000000000040
    [  240.948007] IP: [<ffffffffa0366ce9>] ipoib_start_xmit+0x39/0x280 [ib_ipoib]
    [...]
    [  240.948007] Call Trace:
    [  240.948007]  <IRQ>
    [  240.948007]  [<ffffffff812cd5e0>] dev_hard_start_xmit+0x2a0/0x590
    [  240.948007]  [<ffffffff8131f680>] ? arp_create+0x70/0x200
    [  240.948007]  [<ffffffff812e8e1f>] sch_direct_xmit+0xef/0x1c0

Addresses: https://bugzilla.kernel.org/show_bug.cgi?id=41212
Signed-off-by: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-08-16 10:19:20 -07:00
..
core Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2011-07-22 14:50:12 -07:00
hw atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
ulp IPoIB: Fix possible NULL dereference in ipoib_start_xmit() 2011-08-16 10:19:20 -07:00
Kconfig RDMA: Add netlink infrastructure 2011-05-20 11:46:11 -07:00
Makefile IB/qib: Add new qib driver for QLogic PCIe InfiniBand adapters 2010-05-23 21:44:54 -07:00