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SubjectRe: [PATCH] scsi: libfc: fix null pointer dereference on a null lport
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On 7/2/19 11:18 AM, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> Currently if lport is null then the null lport pointer is dereference
> when printing out debug via the FC_LPORT_DB macro. Fix this by using
> the more generic FC_LIBFC_DBG debug macro instead that does not use
> lport.
>
> Addresses-Coverity: ("Dereference after null check")
> Fixes: 7414705ea4ae ("libfc: Add runtime debugging with debug_logging module parameter")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/scsi/libfc/fc_exch.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
> index 025cd2ff9f65..c477fadbf504 100644
> --- a/drivers/scsi/libfc/fc_exch.c
> +++ b/drivers/scsi/libfc/fc_exch.c
> @@ -2591,8 +2591,8 @@ void fc_exch_recv(struct fc_lport *lport, struct fc_frame *fp)
>
> /* lport lock ? */
> if (!lport || lport->state == LPORT_ST_DISABLED) {
> - FC_LPORT_DBG(lport, "Receiving frames for an lport that "
> - "has not been initialized correctly\n");
> + FC_LIBFC_DBG("Receiving frames for an lport that "
> + "has not been initialized correctly\n");
> fc_frame_free(fp);
> return;
> }
>
Reviewed-by: Hannes Reinecke <hare@suse.com>

Cheers,

Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare@suse.de +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG Nürnberg)

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