Merge branch 'master'

1 files changed, 6 insertions, 0 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index a8eab86de7f1..ccdfbb16c86d 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1062,6 +1062,12 @@ static task_t *copy_process(unsigned long clone_flags,
         p->clear_child_tid = (clone_flags & CLONE_CHILD_CLEARTID) ? child_tidptr: NULL;
 
         /*
+         * sigaltstack should be cleared when sharing the same VM
+         */
+        if ((clone_flags & (CLONE_VM|CLONE_VFORK)) == CLONE_VM)
+                p->sas_ss_sp = p->sas_ss_size = 0;
+
+        /*
          * Syscall tracing should be turned off in the child regardless
          * of CLONE_PTRACE.
          */