MFC r282708:

On exec, single-threading must be enforced before arguments space is
allocated from exec_map.

1 files changed, 14 insertions, 0 deletions

diff --git a/sys/i386/ibcs2/ibcs2_misc.c b/sys/i386/ibcs2/ibcs2_misc.c
index 0eeb6de..2701471 100644
--- a/sys/i386/ibcs2/ibcs2_misc.c
+++ b/sys/i386/ibcs2/ibcs2_misc.c
@@ -200,15 +200,22 @@ ibcs2_execv(td, uap)
 	struct ibcs2_execv_args *uap;
 {
 	struct image_args eargs;
+	struct vmspace *oldvmspace;
 	char *path;
 	int error;
 
         CHECKALTEXIST(td, uap->path, &path);
 
+	error = pre_execve(td, &oldvmspace);
+	if (error != 0) {
+		free(path, M_TEMP);
+		return (error);
+	}
 	error = exec_copyin_args(&eargs, path, UIO_SYSSPACE, uap->argp, NULL);
 	free(path, M_TEMP);
 	if (error == 0)
 		error = kern_execve(td, &eargs, NULL);
+	post_execve(td, error, oldvmspace);
 	return (error);
 }
 
@@ -218,16 +225,23 @@ ibcs2_execve(td, uap)
         struct ibcs2_execve_args *uap;
 {
 	struct image_args eargs;
+	struct vmspace *oldvmspace;
 	char *path;
 	int error;
 
         CHECKALTEXIST(td, uap->path, &path);
 
+	error = pre_execve(td, &oldvmspace);
+	if (error != 0) {
+		free(path, M_TEMP);
+		return (error);
+	}
 	error = exec_copyin_args(&eargs, path, UIO_SYSSPACE, uap->argp,
 	    uap->envp);
 	free(path, M_TEMP);
 	if (error == 0)
 		error = kern_execve(td, &eargs, NULL);
+	post_execve(td, error, oldvmspace);
 	return (error);
 }