From: Paulo Alcantara <paulo@paulo.ac>
Date: Sat, 23 Jun 2018 14:52:25 -0300
Subject: [PATCH] cifs: Make sure all data pages are signed correctly
Git-commit: a12d0c590cc7ae01892f06c5ad6d19580ecdd0de
Patch-mainline: v4.18
References: bsc#1144333
Check if every data page is signed correctly in sigining helper.
Signed-off-by: Paulo Alcantara <palcantara@suse.de>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Aurelien Aptel <aaptel@suse.com>
---
fs/cifs/cifsencrypt.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index b4672eafc5bf..85b31cfa2f3c 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -83,7 +83,13 @@ int __cifs_calc_signature(struct smb_rqst *rqst,
kaddr = (char *) kmap(rqst->rq_pages[i]) + offset;
- crypto_shash_update(shash, kaddr, len);
+ rc = crypto_shash_update(shash, kaddr, len);
+ if (rc) {
+ cifs_dbg(VFS, "%s: Could not update with payload\n",
+ __func__);
+ kunmap(rqst->rq_pages[i]);
+ return rc;
+ }
kunmap(rqst->rq_pages[i]);
}
--
2.16.4