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Subject[PATCH v2][next] scsi: fc: Replace one-element arrays with flexible-array members
Use flexible-array members in struct fc_fdmi_attr_entry and
fs_fdmi_attrs instead of one-element arrays, and refactor the
code accordingly.

Also, this helps with the ongoing efforts to globally enable
-Warray-bounds and get us closer to being able to tighten the
FORTIFY_SOURCE routines on memcpy().

https://github.com/KSPP/linux/issues/79
https://github.com/ClangBuiltLinux/linux/issues/1590
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
Changes in v2:
- Revert changes for _port_ due to protocol definition conflict.
Link: https://lore.kernel.org/lkml/22139a80-3f64-1f21-6b5c-65d250bafe09@linux.ibm.com/
- Update subject line.
- Update changelog text.

drivers/scsi/libfc/fc_encode.h | 2 +-
include/scsi/fc/fc_ms.h | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/libfc/fc_encode.h b/drivers/scsi/libfc/fc_encode.h
index 74ae7fd15d8d..7dcac3b6baa7 100644
--- a/drivers/scsi/libfc/fc_encode.h
+++ b/drivers/scsi/libfc/fc_encode.h
@@ -246,7 +246,7 @@ static inline int fc_ct_ms_fill(struct fc_lport *lport,
&entry->type);
put_unaligned_be16(len, &entry->len);
put_unaligned_be64(lport->wwnn,
- (__be64 *)&entry->value[0]);
+ (__be64 *)&entry->value);

/* Manufacturer */
entry = (struct fc_fdmi_attr_entry *)((char *)entry->value +
diff --git a/include/scsi/fc/fc_ms.h b/include/scsi/fc/fc_ms.h
index 00191695233a..56a5d2b5a624 100644
--- a/include/scsi/fc/fc_ms.h
+++ b/include/scsi/fc/fc_ms.h
@@ -158,7 +158,7 @@ struct fc_fdmi_port_name {
struct fc_fdmi_attr_entry {
__be16 type;
__be16 len;
- __u8 value[1];
+ __u8 value[];
} __attribute__((__packed__));

/*
@@ -166,7 +166,7 @@ struct fc_fdmi_attr_entry {
*/
struct fs_fdmi_attrs {
__be32 numattrs;
- struct fc_fdmi_attr_entry attr[1];
+ struct fc_fdmi_attr_entry attr[];
} __attribute__((__packed__));

/*
--
2.27.0
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