svn commit: r352329 - stable/12/sys/kern

[Konstantin Belousov]

Author: kib
Date: Sat Sep 14 13:33:36 2019
New Revision: 352329
URL: https://svnweb.freebsd.org/changeset/base/352329

Log:
  MFC r352017:
  In do_execve(), use shared text vnode lock consistently.

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	Sat Sep 14 13:32:54 2019	(r352328)
+++ stable/12/sys/kern/kern_exec.c	Sat Sep 14 13:33:36 2019	(r352329)
@@ -528,7 +528,7 @@ interpret:
 			euip = uifind(attr.va_uid);
 			change_euid(imgp->newcred, euip);
 		}
-		vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
+		vn_lock(imgp->vp, LK_SHARED | LK_RETRY);
 		if (attr.va_mode & S_ISGID)
 			change_egid(imgp->newcred, attr.va_gid);
 		/*
@@ -557,7 +557,7 @@ interpret:
 		    oldcred->cr_svgid != oldcred->cr_gid) {
 			VOP_UNLOCK(imgp->vp, 0);
 			imgp->newcred = crdup(oldcred);
-			vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
+			vn_lock(imgp->vp, LK_SHARED | LK_RETRY);
 			change_svuid(imgp->newcred, imgp->newcred->cr_uid);
 			change_svgid(imgp->newcred, imgp->newcred->cr_gid);
 		}
@@ -574,7 +574,7 @@ interpret:
 		if (vn_fullpath(td, imgp->vp, &imgp->execpath,
 		    &imgp->freepath) != 0)
 			imgp->execpath = args->fname;
-		vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
+		vn_lock(imgp->vp, LK_SHARED | LK_RETRY);
 	}
 
 	/*