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authorLong Li <longli@microsoft.com>2018-05-30 22:48:03 +0300
committerSteve French <stfrench@microsoft.com>2018-06-06 01:44:30 +0300
commit4c0d2a5a64332c324d731963861d4a8bb71b7697 (patch)
tree38b062d0beb92905e744b970c25cedb27b4cb5ba /fs/cifs/cifsencrypt.c
parent7cf20bce77581bb72af72835e73c9a47d4346b70 (diff)
downloadlinux-4c0d2a5a64332c324d731963861d4a8bb71b7697.tar.xz
CIFS: Pass page offset for calculating signature
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> Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/cifsencrypt.c')
-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);