svn commit: r301055 - in stable/9/sys: compat/linux kern

[Gleb Smirnoff]

Author: glebius
Date: Tue May 31 16:58:00 2016
New Revision: 301055
URL: https://svnweb.freebsd.org/changeset/base/301055

Log:
  Merge r301053:
  
    Fix kernel stack disclosures in the Linux and 4.3BSD compat layers.
  
  Security:	SA-16:20
  Security:	SA-16:21

Modified:
  stable/9/sys/compat/linux/linux_ioctl.c
  stable/9/sys/compat/linux/linux_misc.c
  stable/9/sys/kern/vfs_syscalls.c
Directory Properties:
  stable/9/   (props changed)
  stable/9/sys/   (props changed)

Modified: stable/9/sys/compat/linux/linux_ioctl.c
==============================================================================
--- stable/9/sys/compat/linux/linux_ioctl.c	Tue May 31 16:57:42 2016	(r301054)
+++ stable/9/sys/compat/linux/linux_ioctl.c	Tue May 31 16:58:00 2016	(r301055)
@@ -911,6 +911,8 @@ linux_ioctl_termio(struct thread *td, st
 
 	case LINUX_TIOCGSERIAL: {
 		struct linux_serial_struct lss;
+
+		bzero(&lss, sizeof(lss));
 		lss.type = LINUX_PORT_16550A;
 		lss.flags = 0;
 		lss.close_delay = 0;

Modified: stable/9/sys/compat/linux/linux_misc.c
==============================================================================
--- stable/9/sys/compat/linux/linux_misc.c	Tue May 31 16:57:42 2016	(r301054)
+++ stable/9/sys/compat/linux/linux_misc.c	Tue May 31 16:58:00 2016	(r301055)
@@ -138,6 +138,7 @@ linux_sysinfo(struct thread *td, struct 
 	int i, j;
 	struct timespec ts;
 
+	bzero(&sysinfo, sizeof(sysinfo));
 	getnanouptime(&ts);
 	if (ts.tv_nsec != 0)
 		ts.tv_sec++;

Modified: stable/9/sys/kern/vfs_syscalls.c
==============================================================================
--- stable/9/sys/kern/vfs_syscalls.c	Tue May 31 16:57:42 2016	(r301054)
+++ stable/9/sys/kern/vfs_syscalls.c	Tue May 31 16:58:00 2016	(r301055)
@@ -2326,6 +2326,7 @@ cvtstat(st, ost)
 	struct ostat *ost;
 {
 
+	bzero(ost, sizeof(*ost));
 	ost->st_dev = st->st_dev;
 	ost->st_ino = st->st_ino;
 	ost->st_mode = st->st_mode;