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(parent: 65ddee3) | patch
powerpc/sysfs: Disable writing to PURR in guest mode
authorMadhavan Srinivasan <maddy@linux.vnet.ibm.com>
Tue, 1 Oct 2013 19:04:10 +0000 (00:34 +0530)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 13 Oct 2013 23:08:31 +0000 (16:08 -0700)
commit4d358e9e19f001d2d7b33c2c8daa7b83b85ae1fc
tree16cf249ef5548a7f34cfcd9c185b9d9536628faetree | snapshot
parent65ddee385ba4ba923eeb64182963815dc24f7bc1commit | diff
powerpc/sysfs: Disable writing to PURR in guest mode

commit d1211af3049f4c9c1d8d4eb8f8098cc4f4f0d0c7 upstream.

arch/powerpc/kernel/sysfs.c exports PURR with write permission.
This may be valid for kernel in phyp mode. But writing to
the file in guest mode causes crash due to a priviledge violation

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/powerpc/kernel/sysfs.c diff | blob | history
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