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| author |   Linus Walleij <linus.walleij@linaro.org> | 2017-06-29 14:27:39 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-06-29 14:27:39 +0200 |
| commit | 61830619675b97d3da34c59c71ae51646a205e2c (patch) | |
| tree | e6d39f81284bdb86ba4214c89994fb454074f583 /kernel/fork.c | |
| parent | pinctrl: armada-37xx: Fix number of pin in sdio_sb (diff) | |
| parent | Linux 4.12-rc7 (diff) | |
| download | wireguard-linux-61830619675b97d3da34c59c71ae51646a205e2c.tar.xz wireguard-linux-61830619675b97d3da34c59c71ae51646a205e2c.zip | |
Merge tag 'v4.12-rc7' into devel
Linux 4.12-rc7
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index aa1076c5e4a9..e53770d2bf95 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1577,6 +1577,18 @@ static __latent_entropy struct task_struct *copy_process( if (!p) goto fork_out; + /* + * This _must_ happen before we call free_task(), i.e. before we jump + * to any of the bad_fork_* labels. This is to avoid freeing + * p->set_child_tid which is (ab)used as a kthread's data pointer for + * kernel threads (PF_KTHREAD). + */ + p->set_child_tid = (clone_flags & CLONE_CHILD_SETTID) ? child_tidptr : NULL; + /* + * Clear TID on mm_release()? + */ + p->clear_child_tid = (clone_flags & CLONE_CHILD_CLEARTID) ? child_tidptr : NULL; + ftrace_graph_init_task(p); rt_mutex_init_task(p); @@ -1743,11 +1755,6 @@ static __latent_entropy struct task_struct *copy_process( } } - p->set_child_tid = (clone_flags & CLONE_CHILD_SETTID) ? child_tidptr : NULL; - /* - * Clear TID on mm_release()? - */ - p->clear_child_tid = (clone_flags & CLONE_CHILD_CLEARTID) ? child_tidptr : NULL; #ifdef CONFIG_BLOCK p->plug = NULL; #endif |