Patch "target: Fix VERIFY_16 handling in sbc_parse_cdb" has been added to the 4.10-stable tree

This is a note to let you know that I've just added the patch titled

target: Fix VERIFY_16 handling in sbc_parse_cdb

to the 4.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
target-fix-verify_16-handling-in-sbc_parse_cdb.patch
and it can be found in the queue-4.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Max Lohrmann <[email protected]>
Date: Tue, 7 Mar 2017 22:09:56 -0800
Subject: target: Fix VERIFY_16 handling in sbc_parse_cdb

From: Max Lohrmann <[email protected]>

commit 13603685c1f12c67a7a2427f00b63f39a2b6f7c9 upstream.

As reported by Max, the Windows 2008 R2 chkdsk utility expects VERIFY_16 to be supported, and does not handle the returned CHECK_CONDITION properly, resulting in an infinite loop.

The kernel will log huge amounts of this error:

kernel: TARGET_CORE[iSCSI]: Unsupported SCSI Opcode 0x8f, sending CHECK_CONDITION.

---
 drivers/target/target_core_sbc.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

@@ -1105,9 +1105,15 @@ sbc_parse_cdb(struct se_cmd *cmd, struct
 			return ret;
 		break;
 	case VERIFY:
+	case VERIFY_16:
 		size = 0;
-		sectors = transport_get_sectors_10(cdb);
-		cmd->t_task_lba = transport_lba_32(cdb);
+		if (cdb[0] == VERIFY) {
+			sectors = transport_get_sectors_10(cdb);
+			cmd->t_task_lba = transport_lba_32(cdb);
+		} else {
+			sectors = transport_get_sectors_16(cdb);
+			cmd->t_task_lba = transport_lba_64(cdb);
+		}
 		cmd->execute_cmd = sbc_emulate_noop;
 		goto check_lba;
 	case REZERO_UNIT:

Patches currently in stable-queue which might be from [email protected] are

queue-4.10/target-fix-verify_16-handling-in-sbc_parse_cdb.patch