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Commit 9b6faee0 authored by Amir Goldstein's avatar Amir Goldstein Committed by Miklos Szeredi
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ovl: check ERR_PTR() return value from ovl_encode_fh() 



Another fix for an issue reported by 0-day robot.

Reported-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Fixes: 8ed5eec9 ("ovl: encode pure upper file handles")
Signed-off-by: default avatarAmir Goldstein <amir73il@gmail.com>
Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
parent 2aed489d

fs/overlayfs/export.c

+3 −0
Original line number Diff line number Diff line
@@ -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)