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| author | Amir Goldstein <amir73il@gmail.com> | 2018-01-30 14:54:45 +0300 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2018-02-05 11:50:29 +0300 |
| commit | 9b6faee074702bbbc207e7027b9416c2d8fea9fe (patch) | |
| tree | c9a15042ac2e9e6ca796c66c4005d6befffe2ef0 | |
| parent | 2aed489d163a6559e07dbc238882c9970ae0f65b (diff) | |
| download | linux-9b6faee074702bbbc207e7027b9416c2d8fea9fe.tar.xz | |
ovl: check ERR_PTR() return value from ovl_encode_fh()
Another fix for an issue reported by 0-day robot.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 8ed5eec9d6c4 ("ovl: encode pure upper file handles")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
| -rw-r--r-- | fs/overlayfs/export.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/overlayfs/export.c b/fs/overlayfs/export.c index b65ea49de457..bb94ce9da5c8 100644 --- a/fs/overlayfs/export.c +++ b/fs/overlayfs/export.c @@ -108,6 +108,9 @@ static int ovl_d_to_fh(struct dentry *dentry, char *buf, int buflen) /* Encode an upper or origin file handle */ fh = ovl_encode_fh(origin ?: ovl_dentry_upper(dentry), !origin); + err = PTR_ERR(fh); + if (IS_ERR(fh)) + goto fail; err = -EOVERFLOW; if (fh->len > buflen) |