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ovl: port ovl_fsync() to cred guard 

Use the scoped ovl cred guard.

Link: https://patch.msgid.link/20251117-work-ovl-cred-guard-v4-9-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 10:33:40 +01:00
parent 1fc4bc77c7
commit 07a891c346
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GPG Key ID: 91C61BC06578DCA2
1 changed files with 2 additions and 6 deletions
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8
fs/overlayfs/file.c
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@ -444,7 +444,6 @@ static int ovl_fsync(struct file *file, loff_t start, loff_t end, int datasync)
enum ovl_path_type type; enum ovl_path_type type;
struct path upperpath; struct path upperpath;
struct file *upperfile; struct file *upperfile;
const struct cred *old_cred;
int ret; int ret;
ret = ovl_sync_status(OVL_FS(file_inode(file)->i_sb)); ret = ovl_sync_status(OVL_FS(file_inode(file)->i_sb));
@ -461,11 +460,8 @@ static int ovl_fsync(struct file *file, loff_t start, loff_t end, int datasync)
if (IS_ERR(upperfile)) if (IS_ERR(upperfile))
return PTR_ERR(upperfile); return PTR_ERR(upperfile);
old_cred = ovl_override_creds(file_inode(file)->i_sb); with_ovl_creds(file_inode(file)->i_sb)
ret = vfs_fsync_range(upperfile, start, end, datasync); return vfs_fsync_range(upperfile, start, end, datasync);
ovl_revert_creds(old_cred);
return ret;
} }
static int ovl_mmap(struct file *file, struct vm_area_struct *vma) static int ovl_mmap(struct file *file, struct vm_area_struct *vma)