MFC r282708:

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

1 files changed, 11 insertions, 3 deletions

diff --git a/sys/i386/linux/linux_machdep.c b/sys/i386/linux/linux_machdep.c
index d9c28d9..effc32a 100644
--- a/sys/i386/linux/linux_machdep.c
+++ b/sys/i386/linux/linux_machdep.c
@@ -126,9 +126,10 @@ bsd_to_linux_sigaltstack(int bsa)
 int
 linux_execve(struct thread *td, struct linux_execve_args *args)
 {
-	int error;
-	char *newpath;
 	struct image_args eargs;
+	struct vmspace *oldvmspace;
+	char *newpath;
+	int error;
 
 	LCONVPATHEXIST(td, args->path, &newpath);
 
@@ -137,12 +138,17 @@ linux_execve(struct thread *td, struct linux_execve_args *args)
 		printf(ARGS(execve, "%s"), newpath);
 #endif
 
+	error = pre_execve(td, &oldvmspace);
+	if (error != 0) {
+		free(newpath, M_TEMP);
+		return (error);
+	}
 	error = exec_copyin_args(&eargs, newpath, UIO_SYSSPACE,
 	    args->argp, args->envp);
 	free(newpath, M_TEMP);
 	if (error == 0)
 		error = kern_execve(td, &eargs, NULL);
-	if (error == 0)
+	if (error == 0) {
 	   	/* linux process can exec fbsd one, dont attempt
 		 * to create emuldata for such process using
 		 * linux_proc_init, this leads to a panic on KASSERT
@@ -150,6 +156,8 @@ linux_execve(struct thread *td, struct linux_execve_args *args)
 		 */
 		if (SV_PROC_ABI(td->td_proc) == SV_ABI_LINUX)
    			error = linux_proc_init(td, 0, 0);
+	}
+	post_execve(td, error, oldvmspace);
 	return (error);
 }