diff options
| author | Ma Wupeng <mawupeng1@huawei.com> | 2022-10-14 09:39:31 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-11-08 17:37:12 -0800 |
| commit | d8e454eb44473b2270e2675fb44a9d79dee36097 (patch) | |
| tree | e1945db5b9fa98952627dac9e495be7dc11310bb /mm/rmap.c | |
| parent | e51da3a9b6c2f67879880259a25c51dbda01c462 (diff) | |
| download | lwn-d8e454eb44473b2270e2675fb44a9d79dee36097.tar.gz lwn-d8e454eb44473b2270e2675fb44a9d79dee36097.zip | |
mm/rmap: fix comment in anon_vma_clone()
Commit 2555283eb40d ("mm/rmap: Fix anon_vma->degree ambiguity leading to
double-reuse") use num_children and num_active_vmas to replace the origin
degree to fix anon_vma UAF problem. Update the comment in anon_vma_clone
to fit this change.
Link: https://lkml.kernel.org/r/20221014013931.1565969-1-mawupeng1@huawei.com
Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/rmap.c')
| -rw-r--r-- | mm/rmap.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 2ec925e5fa6a..92ed6fe3d038 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -315,8 +315,8 @@ int anon_vma_clone(struct vm_area_struct *dst, struct vm_area_struct *src) enomem_failure: /* - * dst->anon_vma is dropped here otherwise its degree can be incorrectly - * decremented in unlink_anon_vmas(). + * dst->anon_vma is dropped here otherwise its num_active_vmas can + * be incorrectly decremented in unlink_anon_vmas(). * We can safely do this because callers of anon_vma_clone() don't care * about dst->anon_vma if anon_vma_clone() failed. */ |