diff mbox series

[v3,12/16] CIFS: Pass page offset for calculating signature

Message ID 20180908021348.19956-13-longli@linuxonhyperv.com (mailing list archive)
State New, archived
Headers show
Series CIFS: add support for direct I/O | expand

Commit Message

Long Li Sept. 8, 2018, 2:13 a.m. UTC 
From: Long Li <longli@microsoft.com>

When calculating signature for the packet, it needs to read into the
correct page offset for the data.

Signed-off-by: Long Li <longli@microsoft.com>
---
 fs/cifs/cifsencrypt.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index a6ef088..e88303c 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -68,11 +68,12 @@  int __cifs_calc_signature(struct smb_rqst *rqst,
 
 	/* now hash over the rq_pages array */
 	for (i = 0; i < rqst->rq_npages; i++) {
-		void *kaddr = kmap(rqst->rq_pages[i]);
-		size_t len = rqst->rq_pagesz;
+		void *kaddr;
+		unsigned int len, offset;
 
-		if (i == rqst->rq_npages - 1)
-			len = rqst->rq_tailsz;
+		rqst_page_get_length(rqst, i, &len, &offset);
+
+		kaddr = (char *) kmap(rqst->rq_pages[i]) + offset;
 
 		crypto_shash_update(shash, kaddr, len);