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-rw-r--r--fs/cifs/cifsencrypt.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index d3e14d1fc0b5..937251cc61c0 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -66,11 +66,12 @@ 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);