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ovl: port ovl_setattr() to cred guard

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Use the scoped ovl cred guard.

Link: https://patch.msgid.link/20251117-work-ovl-cred-guard-v4-13-b31603935724@kernel.org
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2025-11-17 10:33:44 +01:00
parent 9763970984
commit 7aedfa5a52
1 changed files with 2 additions and 4 deletions
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6
fs/overlayfs/inode.c
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@@ -25,7 +25,6 @@ int ovl_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
bool full_copy_up = false;
struct dentry *upperdentry;
const struct cred *old_cred;
err = setattr_prepare(&nop_mnt_idmap, dentry, attr);
if (err)
@@ -78,9 +77,8 @@ int ovl_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
goto out_put_write;
inode_lock(upperdentry->d_inode);
old_cred = ovl_override_creds(dentry->d_sb);
err = ovl_do_notify_change(ofs, upperdentry, attr);
ovl_revert_creds(old_cred);
with_ovl_creds(dentry->d_sb)
err = ovl_do_notify_change(ofs, upperdentry, attr);
if (!err)
ovl_copyattr(dentry->d_inode);
inode_unlock(upperdentry->d_inode);