'cnt' can exceed the size of the risc_ram[] array. Prevent that Coverity
complains by rewriting an address calculation expression. This patch fixes
the following Coverity complaint:
CID 337803 (#1 of 1): Out-of-bounds read (OVERRUN)
109. overrun-local: Overrunning array of 122880 bytes at byte offset 122880
by dereferencing pointer &fw->risc_ram[cnt].
Reviewed-by: Daniel Wagner <dwagner@xxxxxxx>
Cc: Nilesh Javali <njavali@xxxxxxxxxxx>
Cc: Quinn Tran <qutran@xxxxxxxxxxx>
Cc: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Cc: Martin Wilck <mwilck@xxxxxxxx>
Cc: Roman Bolshakov <r.bolshakov@xxxxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
---
drivers/scsi/qla2xxx/qla_dbg.c | 2 +-
drivers/scsi/qla2xxx/qla_dbg.h | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c
index 19005710f7f6..41493bd53fc0 100644
--- a/drivers/scsi/qla2xxx/qla_dbg.c
+++ b/drivers/scsi/qla2xxx/qla_dbg.c
@@ -1063,7 +1063,7 @@ qla2100_fw_dump(scsi_qla_host_t *vha)
}
if (rval == QLA_SUCCESS)
- qla2xxx_copy_queues(ha, &fw->risc_ram[cnt]);
+ qla2xxx_copy_queues(ha, &fw->queue_dump[0]);
qla2xxx_dump_post_process(base_vha, rval);
}
diff --git a/drivers/scsi/qla2xxx/qla_dbg.h b/drivers/scsi/qla2xxx/qla_dbg.h
index 54ed020e6f75..91eb6901815c 100644
--- a/drivers/scsi/qla2xxx/qla_dbg.h
+++ b/drivers/scsi/qla2xxx/qla_dbg.h
@@ -53,6 +53,7 @@ struct qla2100_fw_dump {
__be16 fpm_b0_reg[64];
__be16 fpm_b1_reg[64];
__be16 risc_ram[0xf000];
+ u8 queue_dump[];
};
struct qla24xx_fw_dump {
