diff mbox series

[6/6] scsi: message: fusion: struct _CONFIG_PAGE_IOC_4: Replace 1-element array with flexible array

Message ID 20240711172821.123936-6-kees@kernel.org (mailing list archive)
State Accepted
Headers show
Series scsi: message: fusion: Replace 1-element arrays with flexible arrays | expand

Commit Message

Kees Cook July 11, 2024, 5:28 p.m. UTC
Replace the deprecated[1] use of a 1-element array in
struct _CONFIG_PAGE_IOC_4 with a modern flexible array.

Additionally add __counted_by annotation since SEP is only ever accessed
after updating ACtiveSEP:

lsi/mpi_cnfg.h:    IOC_4_SEP                   SEP[] __counted_by(ActiveSEP);  /* 08h */
mptsas.c:        ii = IOCPage4Ptr->ActiveSEP++;
mptsas.c:        IOCPage4Ptr->SEP[ii].SEPTargetID = id;
mptsas.c:        IOCPage4Ptr->SEP[ii].SEPBus = channel;

No binary differences are present after this conversion.

Link: https://github.com/KSPP/linux/issues/79 [1]
Signed-off-by: Kees Cook <kees@kernel.org>
---
Cc: Sathya Prakash <sathya.prakash@broadcom.com>
Cc: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: MPT-FusionLinux.pdl@broadcom.com
Cc: linux-scsi@vger.kernel.org
Cc: linux-hardening@vger.kernel.org
---
 drivers/message/fusion/lsi/mpi_cnfg.h | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

Comments

Gustavo A. R. Silva July 11, 2024, 6:19 p.m. UTC | #1
On 11/07/24 11:28, Kees Cook wrote:
> Replace the deprecated[1] use of a 1-element array in
> struct _CONFIG_PAGE_IOC_4 with a modern flexible array.
> 
> Additionally add __counted_by annotation since SEP is only ever accessed
> after updating ACtiveSEP:
> 
> lsi/mpi_cnfg.h:    IOC_4_SEP                   SEP[] __counted_by(ActiveSEP);  /* 08h */
> mptsas.c:        ii = IOCPage4Ptr->ActiveSEP++;
> mptsas.c:        IOCPage4Ptr->SEP[ii].SEPTargetID = id;
> mptsas.c:        IOCPage4Ptr->SEP[ii].SEPBus = channel;
> 
> No binary differences are present after this conversion.
> 
> Link: https://github.com/KSPP/linux/issues/79 [1]
> Signed-off-by: Kees Cook <kees@kernel.org>

Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>

Thanks!
diff mbox series

Patch

diff --git a/drivers/message/fusion/lsi/mpi_cnfg.h b/drivers/message/fusion/lsi/mpi_cnfg.h
index bac49c162165..1167a16d8fb4 100644
--- a/drivers/message/fusion/lsi/mpi_cnfg.h
+++ b/drivers/message/fusion/lsi/mpi_cnfg.h
@@ -1077,21 +1077,13 @@  typedef struct _IOC_4_SEP
 } IOC_4_SEP, MPI_POINTER PTR_IOC_4_SEP,
   Ioc4Sep_t, MPI_POINTER pIoc4Sep_t;
 
-/*
- * Host code (drivers, BIOS, utilities, etc.) should leave this define set to
- * one and check Header.PageLength at runtime.
- */
-#ifndef MPI_IOC_PAGE_4_SEP_MAX
-#define MPI_IOC_PAGE_4_SEP_MAX              (1)
-#endif
-
 typedef struct _CONFIG_PAGE_IOC_4
 {
     CONFIG_PAGE_HEADER          Header;                         /* 00h */
     U8                          ActiveSEP;                      /* 04h */
     U8                          MaxSEP;                         /* 05h */
     U16                         Reserved1;                      /* 06h */
-    IOC_4_SEP                   SEP[MPI_IOC_PAGE_4_SEP_MAX];    /* 08h */
+    IOC_4_SEP                   SEP[] __counted_by(ActiveSEP);  /* 08h */
 } CONFIG_PAGE_IOC_4, MPI_POINTER PTR_CONFIG_PAGE_IOC_4,
   IOCPage4_t, MPI_POINTER pIOCPage4_t;