diff options
| author | Christian König <[email protected]> | 2021-04-23 14:28:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2021-04-23 14:42:39 -0700 |
| commit | 2896900e22f8212606a1837d89a6bbce314ceeda (patch) | |
| tree | b2b302014289f70ac9410ce5ff8f9800ec2d239b | |
| parent | 9da29c7f77cd04e5c9150e30f047521b6f20a918 (diff) | |
ovl: fix reference counting in ovl_mmap error path
mmap_region() now calls fput() on the vma->vm_file.
Fix this by using vma_set_file() so it doesn't need to be handled
manually here any more.
Link: https://lkml.kernel.org/r/[email protected]
Fixes: 1527f926fd04 ("mm: mmap: fix fput in error path v2")
Signed-off-by: Christian König <[email protected]>
Reviewed-by: Daniel Vetter <[email protected]>
Cc: Jan Harkes <[email protected]>
Cc: Miklos Szeredi <[email protected]>
Cc: Jason Gunthorpe <[email protected]>
Cc: <[email protected]> [5.11+]
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | fs/overlayfs/file.c | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index dbfb35fb0ff7..3847cdc069b5 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -430,20 +430,11 @@ static int ovl_mmap(struct file *file, struct vm_area_struct *vma) if (WARN_ON(file != vma->vm_file)) return -EIO; - vma->vm_file = get_file(realfile); + vma_set_file(vma, realfile); old_cred = ovl_override_creds(file_inode(file)->i_sb); ret = call_mmap(vma->vm_file, vma); revert_creds(old_cred); - - if (ret) { - /* Drop reference count from new vm_file value */ - fput(realfile); - } else { - /* Drop reference count from previous vm_file value */ - fput(file); - } - ovl_file_accessed(file); return ret; |