[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] x86/PV: fix off-by-one in I/O bitmap limit check
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> --- a/xen/arch/x86/pv/emul-priv-op.c +++ b/xen/arch/x86/pv/emul-priv-op.c @@ -136,7 +136,7 @@ static bool guest_io_okay(unsigned int p if ( iopl_ok(v, regs) ) return true; - if ( v->arch.pv_vcpu.iobmp_limit > (port + bytes) ) + if ( v->arch.pv_vcpu.iobmp_limit >= (port + bytes) ) { union { uint8_t bytes[2]; uint16_t mask; } x; _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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