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Dan Carpenter 6a02433065 drivers/virt/fsl_hypervisor.c: prevent integer overflow in ioctl 
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>
 		2019-05-14 19:52:52 -07:00
..
vboxguest virt: vbox: Sanity-check parameter types for hgcm-calls coming from userspace 2019-04-25 21:52:40 +02:00
Kconfig virt: Add vboxguest driver for Virtual Box Guest integration 2017-12-18 16:12:22 +01:00
Makefile virt: Add vboxguest driver for Virtual Box Guest integration 2017-12-18 16:12:22 +01:00
fsl_hypervisor.c drivers/virt/fsl_hypervisor.c: prevent integer overflow in ioctl 2019-05-14 19:52:52 -07:00