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Subject[PATCH] mm: fix unaccount of memory on vma_link() failure
Date
Fix insert_vm_struct() so that only accounted memory is unaccounted
if vma_link() fails.

Fixes: d4af56c5c7c6 ("mm: start tracking VMAs with maple tree")
Signed-off-by: Anthony Yznaga <anthony.yznaga@oracle.com>
---
mm/mmap.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 514ced13c65c..f8c084017757 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3278,7 +3278,8 @@ int insert_vm_struct(struct mm_struct *mm, struct vm_area_struct *vma)
}

if (vma_link(mm, vma)) {
- vm_unacct_memory(charged);
+ if (vma->vm_flags & VM_ACCOUNT)
+ vm_unacct_memory(charged);
return -ENOMEM;
}

--
2.39.3
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