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linux-sg2042
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target: go through normal processing for all zero-length commands 

Yay, all users of transport_kmap_data_sg now check for a zero-length
request and/or a too-small parameter list length.  We can thus go through
the normal emulation path even for such commands.

This means that out-of-bounds reads and writes are now reported correctly
even if they transfer 0 blocks.  Other errors are also reported correctly.

Testcase: sg_raw /dev/sdb 28 00 80 00 00 00 00 00 00 00
    should fail with ILLEGAL REQUEST / LBA OUT OF RANGE sense
    does not fail without the patch
    (still wrong with the patch, but better: the ASC is INVALID FIELD IN CDB)

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Paolo Bonzini 2012-09-17 16:36:11 -07:00 committed by Nicholas Bellinger
parent e0de445736
commit d81cb44726
1 changed files with 0 additions and 17 deletions
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17
drivers/target/target_core_transport.c
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@ -2289,23 +2289,6 @@ int transport_generic_new_cmd(struct se_cmd *cmd)
if (ret < 0)
goto out_fail;
}
/*
* If this command doesn't have any payload and we don't have to call
* into the fabric for data transfers, go ahead and complete it right
* away.
*/
if (!cmd->data_length &&
cmd->t_task_cdb[0] != REQUEST_SENSE &&
cmd->se_dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
spin_lock_irq(&cmd->t_state_lock);
cmd->t_state = TRANSPORT_COMPLETE;
cmd->transport_state |= CMD_T_ACTIVE;
spin_unlock_irq(&cmd->t_state_lock);
INIT_WORK(&cmd->work, target_complete_ok_work);
queue_work(target_completion_wq, &cmd->work);
return 0;
}
atomic_inc(&cmd->t_fe_count);