From: Chaitra P B <chaitra.basappa@broadcom.com>
To: linux-scsi@vger.kernel.org, stable@vger.kernel.org
Cc: suganath-prabu.subramani@broadcom.com,
Sathya.Prakash@broadcom.com, sreekanth.reddy@broadcom.com,
Chaitra P B <chaitra.basappa@broadcom.com>
Subject: [PATCH 03/15] mpt3sas: Add sanity checks for scsi tracker before accessing it.
Date: Fri, 30 Mar 2018 15:07:12 +0530 [thread overview]
Message-ID: <1522402644-3016-4-git-send-email-chaitra.basappa@broadcom.com> (raw)
In-Reply-To: <1522402644-3016-1-git-send-email-chaitra.basappa@broadcom.com>
Check scsi tracker for NULL before accessing it.
And in some places there are possibilities for getting valid st
but still other fields are not set.
Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
---
drivers/scsi/mpt3sas/mpt3sas_ctl.c | 5 ++++-
drivers/scsi/mpt3sas/mpt3sas_scsih.c | 9 ++++++++-
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/mpt3sas/mpt3sas_ctl.c b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
index c1b17d6..2f27d5c 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_ctl.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
@@ -590,7 +590,8 @@ _ctl_set_task_mid(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command *karg,
struct scsiio_tracker *st;
scmd = mpt3sas_scsih_scsi_lookup_get(ioc, smid);
- if (!scmd)
+ if (scmd == NULL || scmd->device == NULL ||
+ scmd->device->hostdata == NULL)
continue;
if (lun != scmd->device->lun)
continue;
@@ -600,6 +601,8 @@ _ctl_set_task_mid(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command *karg,
if (priv_data->sas_target->handle != handle)
continue;
st = scsi_cmd_priv(scmd);
+ if ((!st) || (st->smid == 0))
+ continue;
tm_request->TaskMID = cpu_to_le16(st->smid);
found = 1;
}
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index c9cce65..6b1aaa0 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -1465,7 +1465,7 @@ mpt3sas_scsih_scsi_lookup_get(struct MPT3SAS_ADAPTER *ioc, u16 smid)
scmd = scsi_host_find_tag(ioc->shost, unique_tag);
if (scmd) {
st = scsi_cmd_priv(scmd);
- if (st->cb_idx == 0xFF)
+ if ((!st) || (st->cb_idx == 0xFF) || (st->smid == 0))
scmd = NULL;
}
}
@@ -4451,6 +4451,13 @@ _scsih_flush_running_cmds(struct MPT3SAS_ADAPTER *ioc)
count++;
_scsih_set_satl_pending(scmd, false);
st = scsi_cmd_priv(scmd);
+ /*
+ * It may be possible that SCSI scmd got prepared by SML
+ * but it has not issued to the driver, for these type of
+ * scmd's don't do anything"
+ */
+ if (st && st->smid == 0)
+ continue;
mpt3sas_base_clear_st(ioc, st);
scsi_dma_unmap(scmd);
if (ioc->pci_error_recovery)
--
1.8.3.1
next prev parent reply other threads:[~2018-03-30 9:39 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-30 9:37 [PATCH 00/15] mpt3sas: Enhancements and Defect fixes Chaitra P B
2018-03-30 9:37 ` [PATCH 01/15] mpt3sas: Fixed warnings Chaitra P B
2018-03-30 9:37 ` [PATCH 02/15] mpt3sas: Pre-allocate RDPQ Array at driver boot time Chaitra P B
2018-03-30 9:37 ` Chaitra P B [this message]
2018-03-30 11:59 ` [PATCH 03/15] mpt3sas: Add sanity checks for scsi tracker before accessing it Christoph Hellwig
2018-04-02 6:23 ` Sreekanth Reddy
2018-04-02 15:25 ` Bart Van Assche
2018-04-03 4:41 ` Sreekanth Reddy
2018-04-03 15:56 ` Bart Van Assche
2018-04-04 12:28 ` Sreekanth Reddy
2018-03-30 15:54 ` Bart Van Assche
2018-03-30 9:37 ` [PATCH 04/15] mpt3sas: Lockless access for chain buffers Chaitra P B
2018-03-30 9:37 ` [PATCH 05/15] mpt3sas: Optimize I/O memory consumption in driver Chaitra P B
2018-03-30 9:37 ` [PATCH 06/15] mpt3sas: Enhanced handling of Sense Buffer Chaitra P B
2018-03-30 9:37 ` [PATCH 07/15] mpt3sas: Added support for SAS Device Discovery Error Event Chaitra P B
2018-03-30 9:37 ` [PATCH 08/15] mpt3sas: Increase event log buffer to support 24 port HBA's Chaitra P B
2018-03-30 9:37 ` [PATCH 09/15] mpt3sas: Allow processing of events during driver unload Chaitra P B
2018-03-30 9:37 ` [PATCH 10/15] mpt3sas: Cache enclosure pages during enclosure add Chaitra P B
2018-03-30 9:37 ` [PATCH 11/15] mpt3sas: Report Firmware Package Version from HBA Driver Chaitra P B
2018-03-31 8:44 ` kbuild test robot
2018-03-30 9:37 ` [PATCH 12/15] mpt3sas: Update MPI Headers Chaitra P B
2018-03-30 9:37 ` [PATCH 13/15] mpt3sas: For NVME device, issue a protocol level reset instead of hot reset and use TM timeout value exposed in PCIe Device Page 2 Chaitra P B
2018-03-30 9:37 ` [PATCH 14/15] mpt3sas: fix possible memory leak Chaitra P B
2018-03-30 9:37 ` [PATCH 15/15] mpt3sas: Update driver version "25.100.00.00" Chaitra P B
2018-03-30 9:58 ` [PATCH 00/15] mpt3sas: Enhancements and Defect fixes Greg KH
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