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Subject[Patch v3 12/16] CIFS: Pass page offset for calculating signature
Date
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 --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);

--
2.7.4
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