Fix memory corruption (overwriting the kmalloc redzone) when saving the

SVE state while in SVE streaming mode.
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fix from Catalin Marinas:
 "Fix memory corruption (overwriting the kmalloc redzone) when saving
  the SVE state while in SVE streaming mode"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: sme: Use STR P to clear FFR context field in streaming SVE mode

arch/arm64/include/asm/fpsimdmacros.h

@@ -316,12 +316,12 @@
  _for n, 0, 15,	_sve_str_p	\n, \nxbase, \n - 16
 		cbz		\save_ffr, 921f
 		_sve_rdffr	0
-		_sve_str_p	0, \nxbase
-		_sve_ldr_p	0, \nxbase, -16
 		b		922f
 921:
-		str		xzr, [x\nxbase]		// Zero out FFR
+		_sve_pfalse	0			// Zero out FFR
 922:
+		_sve_str_p	0, \nxbase
+		_sve_ldr_p	0, \nxbase, -16
 		mrs		x\nxtmp, fpsr
 		str		w\nxtmp, [\xpfpsr]
 		mrs		x\nxtmp, fpcr