linux-kernel - RE: [PATCH] scsi: bfa: bfa_fcs_lport.c: Fix for possible null pointer dereference

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Date:	Wed, 21 May 2014 06:28:31 +0000
From:	Anil Gurumurthy <Anil.Gurumurthy@...gic.com>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	"Sudarsana Kalluru" <Sudarsana.Kalluru@...gic.com>
CC:	"James E.J. Bottomley" <JBottomley@...allels.com>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] scsi: bfa: bfa_fcs_lport.c:  Fix for possible null
 pointer dereference

Thanks for the patch.
Acked-by: Anil Gurumurthy <anil.gurumurthy@...gic.com>

-----Original Message-----
From: Rickard Strandqvist [mailto:rickard_strandqvist@...ctrumdigital.se]
Sent: 18 May 2014 21:36
To: Anil Gurumurthy; Sudarsana Kalluru
Cc: Rickard Strandqvist; James E.J. Bottomley; linux-scsi; linux-kernel
Subject: [PATCH] scsi: bfa: bfa_fcs_lport.c: Fix for possible null pointer dereference

There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 drivers/scsi/bfa/bfa_fcs_lport.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/bfa/bfa_fcs_lport.c b/drivers/scsi/bfa/bfa_fcs_lport.c
index ff75ef8..542d5c6 100644
--- a/drivers/scsi/bfa/bfa_fcs_lport.c
+++ b/drivers/scsi/bfa/bfa_fcs_lport.c
@@ -5826,12 +5826,13 @@ bfa_fcs_lport_get_rport_max_speed(bfa_fcs_lport_t *port)
        bfa_port_speed_t max_speed = 0;
        struct bfa_port_attr_s port_attr;
        bfa_port_speed_t port_speed, rport_speed;
-       bfa_boolean_t trl_enabled = bfa_fcport_is_ratelim(port->fcs->bfa);
+       bfa_boolean_t trl_enabled;


        if (port == NULL)
                return 0;

+       trl_enabled = bfa_fcport_is_ratelim(port->fcs->bfa);
        fcs = port->fcs;

        /* Get Physical port's current speed */
--
1.7.10.4


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