Commit 45564bcd authored Jul 02, 2020 by Linus Torvalds

linux

Pull data race annotation from Christian Brauner:
 "This contains an annotation patch for a data race in copy_process()
  reported by KCSAN when reading and writing nr_threads.

  The data race is intentional and benign. This is obvious from the
  comment above the relevant code and based on general consensus when
  discussing this issue. So simply using data_race() to annotate this as
  an intentional race seems the best option"

* tag 'for-linus-2020-07-02' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  fork: annotate data race in copy_process()

parents 0c7415c3 c17d1a3a

kernel/fork.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1977,7 +1977,7 @@ static __latent_entropy struct task_struct *copy_process(
		* to stop root fork bombs.
		*/
		retval = -EAGAIN;
		if (nr_threads >= max_threads)
		if (data_race(nr_threads >= max_threads))
		goto bad_fork_cleanup_count;

		delayacct_tsk_init(p); /* Must remain after dup_task_struct() */

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