linux-kernel - [PATCH] bfa: remove VLA

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Date:   Thu,  8 Mar 2018 22:38:41 +0100
From:   Stephen Kitt <steve@....org>
To:     hare@...e.com
Cc:     linux-scsi@...r.kernel.org, kernel-hardening@...ts.openwall.com,
        linux-kernel@...r.kernel.org, Stephen Kitt <steve@....org>
Subject: [PATCH] bfa: remove VLA

In preparation to enabling -Wvla, remove VLAs and replace them with
fixed-length arrays instead.

bfad_bsg.c uses a variable-length array declaration to measure the
size of a putative array; this can be replaced by the product of the
size of an element and the number of elements, avoiding the VLA
altogether.

This was prompted by https://lkml.org/lkml/2018/3/7/621

Signed-off-by: Stephen Kitt <steve@....org>
---
 drivers/scsi/bfa/bfad_bsg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/bfa/bfad_bsg.c b/drivers/scsi/bfa/bfad_bsg.c
index 3976e787ba64..7c884f881180 100644
--- a/drivers/scsi/bfa/bfad_bsg.c
+++ b/drivers/scsi/bfa/bfad_bsg.c
@@ -891,7 +891,7 @@ bfad_iocmd_fabric_get_lports(struct bfad_s *bfad, void *cmd,
 
 	if (bfad_chk_iocmd_sz(payload_len,
 		sizeof(struct bfa_bsg_fabric_get_lports_s),
-		sizeof(wwn_t[iocmd->nports])) != BFA_STATUS_OK) {
+		sizeof(wwn_t) * iocmd->nports) != BFA_STATUS_OK) {
 		iocmd->status = BFA_STATUS_VERSION_FAIL;
 		goto out;
 	}
-- 
2.11.0