diff options
| author | Liam Howlett <liam.howlett@oracle.com> | 2022-10-11 23:36:51 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-10-13 01:56:46 +0300 |
| commit | 92b7399695a5cc961c44fc6e4624d3bc3c699ee7 (patch) | |
| tree | 451e22c02a85744496fb4f755979693f2955d89f | |
| parent | 7efc3b7261030da79001c00d92bc3392fd6c664c (diff) | |
| download | linux-92b7399695a5cc961c44fc6e4624d3bc3c699ee7.tar.xz | |
mmap: fix copy_vma() failure path
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@oracle.com
Fixes: 524e00b36e8c ("mm: remove rb tree")
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reported-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Tested-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/mmap.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 6e447544f07d..fc8581cefef7 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -3240,6 +3240,11 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, 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: |