svn commit: r343997 - stable/12/sys/kern

[Konstantin Belousov]

Author: kib
Date: Mon Feb 11 07:09:02 2019
New Revision: 343997
URL: https://svnweb.freebsd.org/changeset/base/343997

Log:
  MFC r343890:
  do_execve(): lock vnode when needed.

Modified:
  stable/12/sys/kern/kern_exec.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/kern/kern_exec.c
==============================================================================
--- stable/12/sys/kern/kern_exec.c	Mon Feb 11 05:39:38 2019	(r343996)
+++ stable/12/sys/kern/kern_exec.c	Mon Feb 11 07:09:02 2019	(r343997)
@@ -696,8 +696,10 @@ interpret:
 	else
 		error = suword(--stack_base, imgp->args->argc) == 0 ?
 		    0 : EFAULT;
-	if (error != 0)
+	if (error != 0) {
+		vn_lock(imgp->vp, LK_SHARED | LK_RETRY);
 		goto exec_fail_dealloc;
+	}
 
 	if (args->fdp != NULL) {
 		/* Install a brand new file descriptor table. */