Current code does not consider 'page_off' in data digest
calculation, to fix this add a local variable 'first_sg' and
set first_sg.offset to sg->offset + page_off.
Fixes: e48354ce078c ("iscsi-target: Add iSCSI fabric support for target v4.1")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Varun Prakash <varun@xxxxxxxxxxx>
---
drivers/target/iscsi/iscsi_target.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index c968961..2ec778e 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -1389,14 +1389,27 @@ static u32 iscsit_do_crypto_hash_sg(
sg = cmd->first_data_sg;
page_off = cmd->first_data_sg_off;
+ if (data_length && page_off) {
+ struct scatterlist first_sg;
+ u32 len = min_t(u32, data_length, sg->length - page_off);
+
+ sg_init_table(&first_sg, 1);
+ sg_set_page(&first_sg, sg_page(sg), len, sg->offset + page_off);
+
+ ahash_request_set_crypt(hash, &first_sg, NULL, len);
+ crypto_ahash_update(hash);
+
+ data_length -= len;
+ sg = sg_next(sg);
+ }
+
while (data_length) {
- u32 cur_len = min_t(u32, data_length, (sg->length - page_off));
+ u32 cur_len = min_t(u32, data_length, sg->length);
ahash_request_set_crypt(hash, sg, NULL, cur_len);
crypto_ahash_update(hash);
data_length -= cur_len;
- page_off = 0;
/* iscsit_map_iovec has already checked for invalid sg pointers */
sg = sg_next(sg);
}
--
2.0.2
