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scsi: fcoe: clear FC_RP_STARTED flags when receiving a LOGO

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When receiving a LOGO request we forget to clear the FC_RP_STARTED flag
before starting the rport delete routine.

As the started flag was not cleared, we're not deleting the rport but
waiting for a restart and thus are keeping the reference count of the rdata
object at 1.

This leads to the following kmemleak report:
unreferenced object 0xffff88006542aa00 (size 512):
  comm "kworker/0:2", pid 24, jiffies 4294899222 (age 226.880s)
  hex dump (first 32 bytes):
    68 96 fe 65 00 88 ff ff 00 00 00 00 00 00 00 00  h..e............
    01 00 00 00 08 00 00 00 02 c5 45 24 ac b8 00 10  ..........E$....
  backtrace:
    [<(____ptrval____)>] fcoe_ctlr_vn_add.isra.5+0x7f/0x770 [libfcoe]
    [<(____ptrval____)>] fcoe_ctlr_vn_recv+0x12af/0x27f0 [libfcoe]
    [<(____ptrval____)>] fcoe_ctlr_recv_work+0xd01/0x32f0 [libfcoe]
    [<(____ptrval____)>] process_one_work+0x7ff/0x1420
    [<(____ptrval____)>] worker_thread+0x87/0xef0
    [<(____ptrval____)>] kthread+0x2db/0x390
    [<(____ptrval____)>] ret_from_fork+0x35/0x40
    [<(____ptrval____)>] 0xffffffffffffffff

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reported-by: ard <ard@kwaak.net>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Johannes Thumshirn 2018-07-31 15:46:03 +02:00 committed by Martin K. Petersen
parent 63d0e3dffd
commit 1550ec458e
1 changed files with 1 additions and 0 deletions
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1
drivers/scsi/libfc/fc_rport.c
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@ -2164,6 +2164,7 @@ static void fc_rport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n",
fc_rport_state(rdata));
rdata->flags &= ~FC_RP_STARTED;
fc_rport_enter_delete(rdata, RPORT_EV_STOP);
mutex_unlock(&rdata->rp_mutex);
kref_put(&rdata->kref, fc_rport_destroy);