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mm: fix unaccount of memory on vma_link() failure 

commit dd34d9fe3b427dea47f81443d022dbaec4339f7e
Author: Anthony Yznaga <anthony.yznaga@oracle.com>
Date:   Tue Aug 29 17:43:24 2023 -0700

    mm: fix unaccount of memory on vma_link() failure

    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: d4af56c5c7c6 ("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>

JIRA: https://issues.redhat.com/browse/RHEL-5619
Signed-off-by: Nico Pache <npache@redhat.com>
This commit is contained in:
Nico Pache 2024-04-15 19:04:20 -06:00
parent 9cea784254
commit 5f4fd578a4
1 changed files with 2 additions and 1 deletions
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3
mm/mmap.c
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@ -3236,7 +3236,8 @@ 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;
}