um: Run UML in it's own session.

If UML is not run by a shell it can happen that UML
will kill unrelated proceses upon a fatal exit because
it issues a kill(0, ...).
To prevent such oddities we create a new session in main().

Reported-and-tested-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c
index 749c96da7b99..e1704ff600ff 100644
--- a/arch/um/os-Linux/main.c
+++ b/arch/um/os-Linux/main.c
@@ -123,6 +123,8 @@ int __init main(int argc, char **argv, char **envp)
 
         setup_env_path();
 
+        setsid();
+
         new_argv = malloc((argc + 1) * sizeof(char *));
         if (new_argv == NULL) {
                 perror("Mallocing argv");