Bug 369361

LTP testcases/kernel/syscalls/vmsplice/vmsplice02 crashes valgrind:
==32085== Syscall param vmsplice(iov) points to unaddressable byte(s)
==32085==    at 0x4F2C173: __vmsplice_nocancel (syscall-template.S:81)
==32085==    by 0x4028BC: vmsplice_verify (vmsplice02.c:119)
==32085==    by 0x4028BC: main (vmsplice02.c:83)
==32085==  Address 0x615000 is not stack'd, malloc'd or (recently) free'd
==32085== 
==32085== Syscall param vmsplice(iov[...]) points to unaddressable byte(s)
==32085==    at 0x4F2C173: __vmsplice_nocancel (syscall-template.S:81)
==32085==    by 0x4028BC: vmsplice_verify (vmsplice02.c:119)
==32085==    by 0x4028BC: main (vmsplice02.c:83)
==32085==  Address 0x800000007 is not stack'd, malloc'd or (recently) free'd
==32085== 
--32085-- VALGRIND INTERNAL ERROR: Valgrind received a signal 11 (SIGSEGV) - exiting
--32085-- si_code=1;  Faulting address: 0x615000;  sp: 0x80327ad70

valgrind: the 'impossible' happened:
   Killed by fatal signal

host stacktrace:
==32085==    at 0x380B71DC: vgSysWrap_linux_sys_vmsplice_before (syswrap-linux.c:5301)
==32085==    by 0x38092CDF: vgPlain_client_syscall (syswrap-main.c:1906)
==32085==    by 0x3808F8B2: handle_syscall (scheduler.c:1118)
==32085==    by 0x38090E76: vgPlain_scheduler (scheduler.c:1435)
==32085==    by 0x380A027A: thread_wrapper (syswrap-linux.c:103)
==32085==    by 0x380A027A: run_a_thread_NORETURN (syswrap-linux.c:156)



Reproducible: Always