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mm/mmap.c: fix missing call to vm_unacct_memory in mmap_region
[ Upstream commit7f82f92231
] Since the beginning, charged is set to 0 to avoid calling vm_unacct_memory twice because vm_unacct_memory will be called by above unmap_region. But since commit4f74d2c8e8
("vm: remove 'nr_accounted' calculations from the unmap_vmas() interfaces"), unmap_region doesn't call vm_unacct_memory anymore. So charged shouldn't be set to 0 now otherwise the calling to paired vm_unacct_memory will be missed and leads to imbalanced account. Link: https://lkml.kernel.org/r/20220618082027.43391-1-linmiaohe@huawei.com Fixes:4f74d2c8e8
("vm: remove 'nr_accounted' calculations from the unmap_vmas() interfaces") Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -1878,7 +1878,6 @@ unmap_and_free_vma:
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/* Undo any partial mapping done by a device driver. */
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unmap_region(mm, vma, prev, vma->vm_start, vma->vm_end);
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charged = 0;
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if (vm_flags & VM_SHARED)
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mapping_unmap_writable(file->f_mapping);
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free_vma:
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