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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-07-02 22:40:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-07-02 22:40:06 -0700 |
| commit | 45564bcd57046ebe8c9309527c114dcd042cb7e5 (patch) | |
| tree | 4741259abf9e326519e76de9987003ffba63b482 /kernel | |
| parent | Merge tag 'tpmdd-next-v5.8-rc4' of git://git.infradead.org/users/jjs/linux-tpmdd (diff) | |
| parent | fork: annotate data race in copy_process() (diff) | |
| download | linux-dev-45564bcd57046ebe8c9309527c114dcd042cb7e5.tar.xz linux-dev-45564bcd57046ebe8c9309527c114dcd042cb7e5.zip | |
Merge tag 'for-linus-2020-07-02' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/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()
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/fork.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 142b23645d82..efc5493203ae 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -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() */ |