x86emul: replace UB shifts
Displacement values can be negative, hence we shouldn't left-shift them.
Or else we get
(XEN) UBSAN: Undefined behaviour in x86_emulate/x86_emulate.c:3482:55
(XEN) left shift of negative value -2
While auditing shifts, I noticed a pair of missing parentheses, which
also get added right here.
Reported-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Tested-by: Andrew Cooper <andrew.cooper3@citrix.com>
projects / xen.git / commit