From: Alexei Potashnik <alexei@xxxxxxxxxxxxxxx>
Current implementation assumes that all the buffers of an IO are linked
with a single SG list. Which makes it fail if SG chaining is used.
Signed-off-by: Alexei Potashnik <alexei@xxxxxxxxxxxxxxx>
---
drivers/target/iscsi/iscsi_target.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 4e68b62..a4cf58c 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -1209,7 +1209,6 @@ static u32 iscsit_do_crypto_hash_sg(
u8 *pad_bytes)
{
u32 data_crc;
- u32 i;
struct scatterlist *sg;
unsigned int page_off;
@@ -1218,15 +1217,15 @@ static u32 iscsit_do_crypto_hash_sg(
sg = cmd->first_data_sg;
page_off = cmd->first_data_sg_off;
- i = 0;
while (data_length) {
- u32 cur_len = min_t(u32, data_length, (sg[i].length - page_off));
+ u32 cur_len = min_t(u32, data_length, (sg->length - page_off));
- crypto_hash_update(hash, &sg[i], cur_len);
+ crypto_hash_update(hash, sg, cur_len);
data_length -= cur_len;
page_off = 0;
- i++;
+ /* iscsit_map_iovec has already checked for invalid sg pointers */
+ sg = sg_next(sg);
}
if (padding) {
--
2.4.3
--
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