3.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Roland Dreier <rol...@purestorage.com>
commit 7409a6657aebf8be74c21d0eded80709b27275cb upstream.
Fail UNMAP commands that have more than our reported limit on unmap
descriptors.
Signed-off-by: Roland Dreier <rol...@purestorage.com>
Signed-off-by: Nicholas Bellinger <n...@linux-iscsi.org>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
drivers/target/target_core_cdb.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/target/target_core_cdb.c
+++ b/drivers/target/target_core_cdb.c
@@ -1133,6 +1133,11 @@ int target_emulate_unmap(struct se_task
bd_dl = get_unaligned_be16(&buf[2]);
size = min(size - 8, bd_dl);
+ if (size / 16 >
dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ ret = -EINVAL;
+ goto err;
+ }
/* First UNMAP block descriptor starts at 8 byte offset */
ptr = &buf[8];
--
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