The patch titled
Subject: mm/mmap: fix __vma_adjust() memory leak
has been added to the -mm tree. Its filename is
mm-start-tracking-vmas-with-maple-tree-fix.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-start-tracking-vmas-with-maple-tree-fix.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-start-tracking-vmas-with-maple-tree-fix.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
Subject: mm/mmap: fix __vma_adjust() memory leak
When shifting the arg pages, the maple state may be left with allocated
memory. Free the memory by calling mas_destroy() unconditionally at the
end of the function.
Link: https://lkml.kernel.org/r/20220427224134.yurrplclbhmnrloj@revolver
Fixes: bd6a1fd58daf (mm: start tracking VMAs with maple tree)
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Reported-by: Qian Cai <quic_qiancai@xxxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 1 +
1 file changed, 1 insertion(+)
--- a/mm/mmap.c~mm-start-tracking-vmas-with-maple-tree-fix
+++ a/mm/mmap.c
@@ -864,6 +864,7 @@ int __vma_adjust(struct vm_area_struct *
MA_STATE(mas, &mm->mm_mt, 0, 0);
struct vm_area_struct *exporter = NULL, *importer = NULL;
+ mas_destroy(&mas);
validate_mm(mm);
validate_mm_mt(mm);
_
Patches currently in -mm which might be from Liam.Howlett@xxxxxxxxxx are
mm-start-tracking-vmas-with-maple-tree-fix.patch
