Dan Carpenter 1a3a561df5 drivers/virt/fsl_hypervisor.c: prevent integer overflow in ioctl ... commit 6a02433065 upstream. The "param.count" value is a u64 thatcomes from the user. The code later in the function assumes that param.count is at least one and if it's not then it leads to an Oops when we dereference the ZERO_SIZE_PTR. Also the addition can have an integer overflow which would lead us to allocate a smaller "pages" array than required. I can't immediately tell what the possible run times implications are, but it's safest to prevent the overflow. Link: http://lkml.kernel.org/r/20181218082129.GE32567@kadam Fixes: 6db7199407 ("drivers/virt: introduce Freescale hypervisor management driver") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Timur Tabi <timur@freescale.com> Cc: Mihai Caraman <mihai.caraman@freescale.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-05-16 19:42:35 +02:00
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fsl_hypervisor.c	drivers/virt/fsl_hypervisor.c: prevent integer overflow in ioctl	2019-05-16 19:42:35 +02:00
Kconfig	PPC: select EPAPR_PARAVIRT for all users of epapr hcalls	2012-10-05 23:38:37 +02:00
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