Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Fixes: 8ed5eec9d6c4 ("ovl: encode pure upper file handles")
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
---
Miklos,
Another fix on top on overlayfs-next, for an issue reported by 0-day robot.
If you are going to squash this one and the other regression fix to
overlayfs-next, just keep in mind that overlayfs-next has already been
merged with Al's for-next branch on linux-next tree to resolve a conflict.
Thanks,
Amir.
fs/overlayfs/export.c | 3 +++
1 file changed, 3 insertions(+)
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)
--
2.7.4
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