[PATCH 2/3] kernel/fork: use vfree_atomic() to free thread stack
From: Andrey Ryabinin <hidden>
Date: 2016-11-08 15:21:57
Also in:
linux-mm, lkml
Subsystem:
exec & binfmt api, elf, memory management - core, scheduler, the rest · Maintainers:
Kees Cook, Andrew Morton, David Hildenbrand, Ingo Molnar, Peter Zijlstra, Juri Lelli, Vincent Guittot, Linus Torvalds
vfree() is going to use sleeping lock. Thread stack freed in atomic context, therefore we must use vfree_atomic() here. Signed-off-by: Andrey Ryabinin <redacted> Cc: Andy Lutomirski <luto@kernel.org> Cc: Joel Fernandes <redacted> Cc: Christoph Hellwig <hch@lst.de> Cc: Jisheng Zhang <redacted> Cc: Chris Wilson <redacted> Cc: John Dias <redacted> Cc: Thomas Gleixner <redacted> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org --- kernel/fork.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/fork.c b/kernel/fork.c
index fd85c68..417e94f 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c@@ -229,7 +229,7 @@ static inline void free_thread_stack(struct task_struct *tsk) } local_irq_restore(flags); - vfree(tsk->stack); + vfree_atomic(tsk->stack); return; } #endif
--
2.7.3
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