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| author | Christian Brauner <brauner@kernel.org> | 2025-11-17 12:33:32 +0300 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-11-19 23:58:19 +0300 |
| commit | 6f5c84162a30514a795eab3495a12c19306d6f6c (patch) | |
| tree | f836613fa05b59a8504815137af58a532814f189 | |
| parent | 658d1322fad946bdfe670f51cf3f279258048c8d (diff) | |
| download | linux-6f5c84162a30514a795eab3495a12c19306d6f6c.tar.xz | |
ovl: add override_creds cleanup guard extension for overlayfs
Overlayfs plucks the relevant creds from the superblock. Extend the
override_creds cleanup class I added to override_creds_ovl which uses
the ovl_override_creds() function as initialization helper. Add
with_ovl_creds() based on this new class.
Link: https://patch.msgid.link/20251117-work-ovl-cred-guard-v4-1-b31603935724@kernel.org
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
| -rw-r--r-- | fs/overlayfs/overlayfs.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 746bc4ad7b37..362a3485dc53 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -457,6 +457,11 @@ struct dentry *ovl_workdir(struct dentry *dentry); const struct cred *ovl_override_creds(struct super_block *sb); void ovl_revert_creds(const struct cred *old_cred); +EXTEND_CLASS(override_creds, _ovl, ovl_override_creds(sb), struct super_block *sb) + +#define with_ovl_creds(sb) \ + scoped_class(override_creds_ovl, __UNIQUE_ID(label), sb) + static inline const struct cred *ovl_creds(struct super_block *sb) { return OVL_FS(sb)->creator_cred; |