powerpc/hw_breakpoints: Fix incorrect pointer access
authorNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Fri, 6 Jul 2012 01:30:58 +0000 (01:30 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 11 Jul 2012 04:20:20 +0000 (14:20 +1000)
commitac84aa2b3b9b791eac45174d1966d5fdf3bbba1c
treeae7fae6ae9aced79d6bb2e9a30a36cd0920a17bf
parent1d5a436d2ce9d1b65c905f69a33e78d69245993e
powerpc/hw_breakpoints: Fix incorrect pointer access

If arch_validate_hwbkpt_settings() fails, bp->ctx won't be valid and the
kernel panics. Add a check to fix this.

Reported-by: Edjunior Barbosa Machado <emachado@linux.vnet.ibm.com>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/kernel/hw_breakpoint.c