The patch titled
Subject: mmap: fix copy_vma() failure path
has been added to the -mm mm-unstable branch. Its filename is
mmap-fix-copy_vma-failure-path.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mmap-fix-copy_vma-failure-path.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Liam Howlett <liam.howlett@xxxxxxxxxx>
Subject: mmap: fix copy_vma() failure path
Date: Tue, 11 Oct 2022 20:36:51 +0000
The anon vma was not unlinked and the file was not closed in the failure
path when the machine runs out of memory during the maple tree
modification. This caused a memory leak of the anon vma chain and vma
since neither would be freed.
Link: https://lkml.kernel.org/r/20221011203621.1446507-1-Liam.Howlett@xxxxxxxxxx
Fixes: 524e00b36e8c (mm: remove rb tree.)
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Reported-by: Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/mm/mmap.c~mmap-fix-copy_vma-failure-path
+++ a/mm/mmap.c
@@ -3240,6 +3240,11 @@ struct vm_area_struct *copy_vma(struct v
out_vma_link:
if (new_vma->vm_ops && new_vma->vm_ops->close)
new_vma->vm_ops->close(new_vma);
+
+ if (new_vma->vm_file)
+ fput(new_vma->vm_file);
+
+ unlink_anon_vmas(new_vma);
out_free_mempol:
mpol_put(vma_policy(new_vma));
out_free_vma:
_
Patches currently in -mm which might be from liam.howlett@xxxxxxxxxx are
mmap-fix-copy_vma-failure-path.patch
