svn commit: r338813 - head/sys/arm64/arm64

[John Baldwin]

Author: jhb
Date: Wed Sep 19 22:53:52 2018
New Revision: 338813
URL: https://svnweb.freebsd.org/changeset/base/338813

Log:
  Clear all of the VFP state in fill_fpregs().
  
  Zero the entire FP register set structure returned for ptrace() if a
  thread hasn't used FP registers rather than leaking garbage in the
  fp_sr and fp_cr fields.
  
  Reviewed by:	emaste, andrew
  Approved by:	re (rgrimes)
  MFC after:	2 weeks
  Sponsored by:	DARPA, AFRL
  Differential Revision:	https://reviews.freebsd.org/D17140

Modified:
  head/sys/arm64/arm64/machdep.c

Modified: head/sys/arm64/arm64/machdep.c
==============================================================================
--- head/sys/arm64/arm64/machdep.c	Wed Sep 19 22:39:40 2018	(r338812)
+++ head/sys/arm64/arm64/machdep.c	Wed Sep 19 22:53:52 2018	(r338813)
@@ -236,7 +236,7 @@ fill_fpregs(struct thread *td, struct fpreg *regs)
 		regs->fp_sr = pcb->pcb_fpustate.vfp_fpsr;
 	} else
 #endif
-		memset(regs->fp_q, 0, sizeof(regs->fp_q));
+		memset(regs, 0, sizeof(*regs));
 	return (0);
 }