releases/4.14.44/scsi-qla2xxx-fix-memory-corruption-during-hba-reset-test.patch

   1 From foo@baz Thu May 24 11:09:34 CEST 2018
   2 From: Quinn Tran <quinn.tran@cavium.com>
   3 Date: Tue, 23 Jan 2018 11:05:21 -0800
   4 Subject: scsi: qla2xxx: Fix memory corruption during hba reset test
   5
   6 From: Quinn Tran <quinn.tran@cavium.com>
   7
   8 [ Upstream commit 2ce87cc5b269510de9ca1185ca8a6e10ec78c069 ]
   9
  10 This patch fixes memory corrpution while performing HBA Reset test.
  11
  12 Following stack trace is seen:
  13
  14 [  466.397219] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
  15 [  466.433669] IP: [<ffffffffc06f5dd0>] qlt_free_session_done+0x260/0x5f0 [qla2xxx]
  16 [  466.467731] PGD 0
  17 [  466.476718] Oops: 0000 [#1] SMP
  18
  19 Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
  20 Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
  21 Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
  22 Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
  23 Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
  24 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  25 ---
  26  drivers/scsi/qla2xxx/qla_os.c |    2 ++
  27  1 file changed, 2 insertions(+)
  28
  29 --- a/drivers/scsi/qla2xxx/qla_os.c
  30 +++ b/drivers/scsi/qla2xxx/qla_os.c
  31 @@ -3581,6 +3581,8 @@ qla2x00_remove_one(struct pci_dev *pdev)
  32         }
  33         qla2x00_wait_for_hba_ready(base_vha);
  34
  35 +       qla2x00_wait_for_sess_deletion(base_vha);
  36 +
  37         /*
  38          * if UNLOAD flag is already set, then continue unload,
  39          * where it was set first.