• Nicholas Bellinger's avatar
    iscsi-target: Fix reject release handling in iscsit_free_cmd() · c1ce4bd5
    Nicholas Bellinger authored
    This patch addresses a bug where iscsit_free_cmd() was incorrectly calling
    iscsit_release_cmd() for ISCSI_OP_REJECT because iscsi_add_reject*() will
    overwrite the original iscsi_cmd->iscsi_opcode assignment.  This bug was
    introduced with the following commit:
    
    commit 0be67f2ed8f577d2c72d917928394c5885fa9134
    Author: Nicholas Bellinger <nab@linux-iscsi.org>
    Date:   Sun Oct 9 01:48:14 2011 -0700
    
        iscsi-target: Remove SCF_SE_LUN_CMD flag abuses
    
    and was manifesting itself as list corruption with the following:
    
    [  131.191092] ------------[ cut here ]------------
    [  131.191092] WARNING: at lib/list_debug.c:53 __list_del_entry+0x8d/0x98()
    [  131.191092] Hardware name: VMware Virtual Platform
    [  131.191092] list_del corruption. prev->next should be ffff880022d3c100, but was 6b6b6b6b6b6b6b6b
    [  131.191092] Modules linked in: tcm_vhost ib_srpt ib_cm ib_sa ib_mad ib_core tcm_qla2xxx qla2xxx tcm_loop tcm_fc libfc scsi_transport_fc crc32c iscsi_target_mod target_core_stgt scsi_tgt target_core_pscsi target_core_file target_core_iblock target_core_mod configfs ipv6 iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi sr_mod cdrom sd_mod e1000 ata_piix libata mptspi mptscsih mptbase [last unloaded: scsi_wait_scan]
    [  131.191092] Pid: 2250, comm: iscsi_ttx Tainted: G        W    3.2.0-rc4+ #42
    [  131.191092] Call Trace:
    [  131.191092]  [<ffffffff8103b553>] warn_slowpath_common+0x80/0x98
    [  131.191092]  [<ffffffff8103b5ff>] warn_slowpath_fmt+0x41/0x43
    [  131.191092]  [<ffffffff811d0279>] __list_del_entry+0x8d/0x98
    [  131.191092]  [<ffffffffa01395c9>] transport_lun_remove_cmd+0x9b/0xb7 [target_core_mod]
    [  131.191092]  [<ffffffffa013a55c>] transport_generic_free_cmd+0x5d/0x71 [target_core_mod]
    [  131.191092]  [<ffffffffa01a012b>] iscsit_free_cmd+0x1e/0x27 [iscsi_target_mod]
    [  131.191092]  [<ffffffffa01a13be>] iscsit_close_connection+0x14d/0x5b2 [iscsi_target_mod]
    [  131.191092]  [<ffffffffa0196a0c>] iscsit_take_action_for_connection_exit+0xdb/0xe0 [iscsi_target_mod]
    [  131.191092]  [<ffffffffa01a55d4>] iscsi_target_tx_thread+0x15cb/0x1608 [iscsi_target_mod]
    [  131.191092]  [<ffffffff8103609a>] ? check_preempt_wakeup+0x121/0x185
    [  131.191092]  [<ffffffff81030801>] ? __dequeue_entity+0x2e/0x33
    [  131.191092]  [<ffffffffa01a4009>] ? iscsit_send_text_rsp+0x25f/0x25f [iscsi_target_mod]
    [  131.191092]  [<ffffffffa01a4009>] ? iscsit_send_text_rsp+0x25f/0x25f [iscsi_target_mod]
    [  131.191092]  [<ffffffff8138f706>] ? schedule+0x55/0x57
    [  131.191092]  [<ffffffff81056c7d>] kthread+0x7d/0x85
    [  131.191092]  [<ffffffff81399534>] kernel_thread_helper+0x4/0x10
    [  131.191092]  [<ffffffff81056c00>] ? kthread_worker_fn+0x16d/0x16d
    [  131.191092]  [<ffffffff81399530>] ? gs_change+0x13/0x13
    
    Reported-by: <jrepac@yahoo.com>
    Cc: <stable@vger.kernel.org>
    Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
    c1ce4bd5
iscsi_target_util.c 40.4 KB