diff options
| author | Ingo Molnar <mingo@kernel.org> | 2020-08-01 09:25:21 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-08-01 09:26:27 +0200 |
| commit | 63722bbca662b19eb39fe709c11a5fa3994b4c3f (patch) | |
| tree | 845060d13c90891cb89f18e29c40cf6dfdebe850 /kernel/fork.c | |
| parent | 28cff52eaeb5c43144d0c730080aff0d6bc1e5d5 (diff) | |
| parent | 61d56d7aa5eca3b909bce51ba8125b0fa44d7e17 (diff) | |
Merge branch 'kcsan' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into locking/core
Pull v5.9 KCSAN bits from Paul E. McKenney.
Perhaps the most important change is that GCC 11 now has all fixes in place
to support KCSAN, so GCC support can be enabled again.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 56a640799680..0cc3d9cd6cc2 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -359,7 +359,13 @@ struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig) struct vm_area_struct *new = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL); if (new) { - *new = *orig; + ASSERT_EXCLUSIVE_WRITER(orig->vm_flags); + ASSERT_EXCLUSIVE_WRITER(orig->vm_file); + /* + * orig->shared.rb may be modified concurrently, but the clone + * will be reinitialized. + */ + *new = data_race(*orig); INIT_LIST_HEAD(&new->anon_vma_chain); new->vm_next = new->vm_prev = NULL; } |