Commit 164c33c6 authored by Salman Qazi's avatar Salman Qazi Committed by Ingo Molnar

sched: Fix fork() error path to not crash

In dup_task_struct(), if arch_dup_task_struct() fails, the clean up
code fails to clean up correctly.  That's because the clean up
code depends on unininitalized ti->task pointer.  We fix this
by making sure that the task and thread_info know about each other
before we attempt to take the error path.
Signed-off-by: default avatarSalman Qazi <>
Signed-off-by: default avatarPeter Zijlstra <>
Link: default avatarIngo Molnar <>
parent 9e85a6f9
......@@ -304,12 +304,17 @@ static struct task_struct *dup_task_struct(struct task_struct *orig)
err = arch_dup_task_struct(tsk, orig);
if (err)
goto out;
* We defer looking at err, because we will need this setup
* for the clean up path to work correctly.
tsk->stack = ti;
setup_thread_stack(tsk, orig);
if (err)
goto out;
stackend = end_of_stack(tsk);
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment