target: Fix VERIFY_16 handling in sbc_parse_cdb

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.

Signed-off-by: Max Lohrmann <post@wickenrode.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 2e27b1034ede7f2aa40f47282e6c4acec363c638..90c5dffc9fa47afd1dd3e40067d46b96b516cfc3 100644 (file)
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -1096,9 +1096,15 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
                        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: