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| author |   Miklos Szeredi <mszeredi@redhat.com> | 2022-01-14 16:57:56 +0100 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2022-01-14 16:57:56 +0100 |
| commit | 94fd19752b28aa66c98e7991734af91dfc529f8f (patch) | |
| tree | bff531e876b3d09ae1a08ec4353c8f8e33b75bdd /fs/overlayfs | |
| parent | ovl: fix NULL pointer dereference in copy up warning (diff) | |
| download | linux-dev-94fd19752b28aa66c98e7991734af91dfc529f8f.tar.xz linux-dev-94fd19752b28aa66c98e7991734af91dfc529f8f.zip | |
ovl: don't fail copy up if no fileattr support on upper
Christoph Fritz is reporting that failure to copy up fileattr when upper
doesn't support fileattr or xattr results in a regression.
Return success in these failure cases; this reverts overlayfs to the old
behavior.
Add a pr_warn_once() in these cases to still let the user know about the
copy up failures.
Reported-by: Christoph Fritz <chf.fritz@googlemail.com>
Fixes: 72db82115d2b ("ovl: copy up sync/noatime fileattr flags")
Cc: <stable@vger.kernel.org> # v5.15
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs')
| -rw-r--r-- | fs/overlayfs/copy_up.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c index 347b06479663..e040970408d4 100644 --- a/fs/overlayfs/copy_up.c +++ b/fs/overlayfs/copy_up.c @@ -157,7 +157,9 @@ static int ovl_copy_fileattr(struct inode *inode, struct path *old, */ if (oldfa.flags & OVL_PROT_FS_FLAGS_MASK) { err = ovl_set_protattr(inode, new->dentry, &oldfa); - if (err) + if (err == -EPERM) + pr_warn_once("copying fileattr: no xattr on upper\n"); + else if (err) return err; } @@ -167,6 +169,14 @@ static int ovl_copy_fileattr(struct inode *inode, struct path *old, err = ovl_real_fileattr_get(new, &newfa); if (err) { + /* + * Returning an error if upper doesn't support fileattr will + * result in a regression, so revert to the old behavior. + */ + if (err == -ENOTTY || err == -EINVAL) { + pr_warn_once("copying fileattr: no support on upper\n"); + return 0; + } pr_warn("failed to retrieve upper fileattr (%pd2, err=%i)\n", new->dentry, err); return err; |