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authorMiaohe Lin <linmiaohe@huawei.com>2022-06-18 16:20:27 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-08-25 11:15:18 +0200
commitf84c69bbb3ccc544f0023c4dbbdf922c09b5d80b (patch)
treec4026bed2bfdbd47e23195ecb596875d9685ea5d /mm
parentb59004aa302eaecd7f5501bd85c7821a0eff85ad (diff)
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mm/mmap.c: fix missing call to vm_unacct_memory in mmap_region
[ Upstream commit 7f82f922319ede486540e8746769865b9508d2c2 ] 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 commit 4f74d2c8e827 ("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: 4f74d2c8e827 ("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>
Diffstat (limited to 'mm')
-rw-r--r--mm/mmap.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index bb8ba3258945..590840c3a3b5 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1821,7 +1821,6 @@ unmap_and_free_vma:
/* Undo any partial mapping done by a device driver. */
unmap_region(mm, vma, prev, vma->vm_start, vma->vm_end);
- charged = 0;
if (vm_flags & VM_SHARED)
mapping_unmap_writable(file->f_mapping);
allow_write_and_free_vma: