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scsi: libfc: fix null pointer dereference on a null lport 

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: 7414705ea4 ("libfc: Add runtime debugging with debug_logging module parameter")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Colin Ian King 2019-07-02 10:18:35 +01:00 committed by Martin K. Petersen
parent 4846470888
commit 41a6bf6529
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/libfc/fc_exch.c
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@ -2591,7 +2591,7 @@ 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 "
FC_LIBFC_DBG("Receiving frames for an lport that "
"has not been initialized correctly\n");
fc_frame_free(fp);
return;