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mm: fix unaccount of memory on vma_link() failure

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Fix insert_vm_struct() so that only accounted memory is unaccounted if
vma_link() fails.

Link: https://lkml.kernel.org/r/20230830004324.16101-1-anthony.yznaga@oracle.com
Fixes: d4af56c5c7 ("mm: start tracking VMAs with maple tree")
Signed-off-by: Anthony Yznaga <anthony.yznaga@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Anthony Yznaga 2023-08-29 17:43:24 -07:00 • committed by Andrew Morton
parent 954652b9f3
commit dd34d9fe3b
1 changed files with 2 additions and 1 deletions
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3
mm/mmap.c
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@ -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;
}