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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Fri, 3 Dec 2010 21:52:01 +0000 (UTC)
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Subject: svn commit: r216160 - stable/8/sys/fs/procfs
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Author: kib
Date: Fri Dec  3 21:52:01 2010
New Revision: 216160
URL: http://svn.freebsd.org/changeset/base/216160

Log:
  MFC r216120:
  For /proc/<pid>/{regs,fpregs} read access, require the thread to be in
  stopped state. Otherwise, return EBUSY as is done for write case.
  
  Approved by:	re (bz)

Modified:
  stable/8/sys/fs/procfs/procfs_fpregs.c
  stable/8/sys/fs/procfs/procfs_regs.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)

Modified: stable/8/sys/fs/procfs/procfs_fpregs.c
==============================================================================
--- stable/8/sys/fs/procfs/procfs_fpregs.c	Fri Dec  3 21:06:30 2010	(r216159)
+++ stable/8/sys/fs/procfs/procfs_fpregs.c	Fri Dec  3 21:52:01 2010	(r216160)
@@ -97,6 +97,10 @@ procfs_doprocfpregs(PFS_FILL_ARGS)
 		PROC_UNLOCK(p);
 		return (EPERM);
 	}
+	if (!P_SHOULDSTOP(p)) {
+		PROC_UNLOCK(p);
+		return (EBUSY);
+	}
 
 	/* XXXKSE: */
 	td2 = FIRST_THREAD_IN_PROC(p);

Modified: stable/8/sys/fs/procfs/procfs_regs.c
==============================================================================
--- stable/8/sys/fs/procfs/procfs_regs.c	Fri Dec  3 21:06:30 2010	(r216159)
+++ stable/8/sys/fs/procfs/procfs_regs.c	Fri Dec  3 21:52:01 2010	(r216160)
@@ -97,6 +97,10 @@ procfs_doprocregs(PFS_FILL_ARGS)
 		PROC_UNLOCK(p);
 		return (EPERM);
 	}
+	if (!P_SHOULDSTOP(p)) {
+		PROC_UNLOCK(p);
+		return (EBUSY);
+	}
 
 	/* XXXKSE: */
 	td2 = FIRST_THREAD_IN_PROC(p);