The "call" variable comes from the user in privcmd_ioctl_hypercall().
It's an offset into the hypercall_page[] which has (PAGE_SIZE / 32)
elements. We need to put an upper bound on it to prevent an out of
bounds access.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Obtained from: Linux
Linux commit: 42d8644bd77dd2d747e004e367cb0c895a606f39
Fixes:
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.. | ||
hypercall.h | ||
synch_bitops.h | ||
xen-os.h |