On 09/14, Dmitry V. Levin wrote: > > On Wed, Sep 13, 2017 at 06:49:21PM +0200, Oleg Nesterov wrote: > > > do_syscall_64() does "nr & __SYSCALL_MASK" unconditionally, > > yes > > > this clears the upper bits, no? > > Why? As "nr" is of type "unsigned long" and __SYSCALL_MASK is either > (~(__X32_SYSCALL_BIT)) or (~0), that is, an integer with the sign bit set,
Yes, thanks for correcting me, it is "int" but somehow I thought it is "unsigned int". Oleg.
