From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Adaptec OEM Raid Solutions <aacraid@microsemi.com>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
linux-hardening@vger.kernel.org,
"Gustavo A. R. Silva" <gustavoars@kernel.org>
Subject: [PATCH 4/8][next] scsi: aacraid: Replace one-element array with flexible-array member in struct sgmap64
Date: Tue, 22 Feb 2022 01:30:06 -0600 [thread overview]
Message-ID: <b01c8a060d5da4a0b13fc518e7989b782d3d4a6a.1645513670.git.gustavoars@kernel.org> (raw)
In-Reply-To: <cover.1645513670.git.gustavoars@kernel.org>
Replace one-element array with flexible-array member in struct sgmap64.
Also, make use of the struct_size() helper and refactor the code
according to the flexible array transformation in struct sgmap64.
This issue was found with the help of Coccinelle and audited and fixed,
manually.
Link: https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
Link: https://github.com/KSPP/linux/issues/79
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
drivers/scsi/aacraid/aachba.c | 15 +++++----------
drivers/scsi/aacraid/aacraid.h | 2 +-
2 files changed, 6 insertions(+), 11 deletions(-)
diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
index 5014d8374916..02b75a2c3a88 100644
--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c
@@ -1281,7 +1281,7 @@ static int aac_read_raw_io(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u3
static int aac_read_block64(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u32 count)
{
- u16 fibsize;
+ size_t fibsize;
struct aac_read64 *readcmd;
long ret;
@@ -1297,9 +1297,7 @@ static int aac_read_block64(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u
ret = aac_build_sg64(cmd, &readcmd->sg);
if (ret < 0)
return ret;
- fibsize = sizeof(struct aac_read64) +
- ((le32_to_cpu(readcmd->sg.count) - 1) *
- sizeof (struct sgentry64));
+ fibsize = struct_size(readcmd, sg.sg, le32_to_cpu(readcmd->sg.count));
BUG_ON (fibsize > (fib->dev->max_fib_size -
sizeof(struct aac_fibhdr)));
/*
@@ -1413,7 +1411,7 @@ static int aac_write_raw_io(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u
static int aac_write_block64(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u32 count, int fua)
{
- u16 fibsize;
+ size_t fibsize;
struct aac_write64 *writecmd;
long ret;
@@ -1429,9 +1427,7 @@ static int aac_write_block64(struct fib * fib, struct scsi_cmnd * cmd, u64 lba,
ret = aac_build_sg64(cmd, &writecmd->sg);
if (ret < 0)
return ret;
- fibsize = sizeof(struct aac_write64) +
- ((le32_to_cpu(writecmd->sg.count) - 1) *
- sizeof (struct sgentry64));
+ fibsize = struct_size(writecmd, sg.sg, le32_to_cpu(writecmd->sg.count));
BUG_ON (fibsize > (fib->dev->max_fib_size -
sizeof(struct aac_fibhdr)));
/*
@@ -2263,8 +2259,7 @@ int aac_get_adapter_info(struct aac_dev* dev)
dev->scsi_host_ptr->sg_tablesize =
(dev->max_fib_size -
sizeof(struct aac_fibhdr) -
- sizeof(struct aac_write64) +
- sizeof(struct sgentry64)) /
+ sizeof(struct aac_write64)) /
sizeof(struct sgentry64);
} else {
dev->a_ops.adapter_read = aac_read_block;
diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h
index bcf97c1b8c0c..573cb36c2e15 100644
--- a/drivers/scsi/aacraid/aacraid.h
+++ b/drivers/scsi/aacraid/aacraid.h
@@ -516,7 +516,7 @@ struct user_sgmap {
struct sgmap64 {
__le32 count;
- struct sgentry64 sg[1];
+ struct sgentry64 sg[];
};
struct user_sgmap64 {
--
2.27.0
next prev parent reply other threads:[~2022-02-22 7:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-22 7:28 [PATCH 0/8] scsi: aacraid: Replace one-element arrays with flexible-array members Gustavo A. R. Silva
2022-02-22 7:28 ` [PATCH 1/8][next] scsi: aacraid: Replace one-element array with flexible-array member Gustavo A. R. Silva
2022-02-22 7:29 ` [PATCH 2/8][next] scsi: aacraid: Replace one-element array with flexible-array member in struct sgmap Gustavo A. R. Silva
2022-02-22 7:29 ` [PATCH 3/8][next] scsi: aacraid: Replace one-element array with flexible-array member in struct user_sgmap Gustavo A. R. Silva
2022-02-22 7:30 ` Gustavo A. R. Silva [this message]
2022-02-22 7:30 ` [PATCH 5/8][next] scsi: aacraid: Replace one-element array with flexible-array member in struct user_sgmap64 Gustavo A. R. Silva
2022-02-22 7:30 ` [PATCH 6/8][next] scsi: aacraid: Replace one-element array with flexible-array member in struct sgmapraw Gustavo A. R. Silva
2022-02-22 7:30 ` [PATCH 7/8][next] scsi: aacraid: Replace one-element array with flexible-array member in struct user_sgmapraw Gustavo A. R. Silva
2022-02-22 7:31 ` [PATCH 8/8][next] scsi: aacraid: Replace one-element array with flexible-array member in struct aac_aifcmd Gustavo A. R. Silva
2022-06-23 16:29 ` Kees Cook
2022-03-10 4:03 ` [PATCH 0/8] scsi: aacraid: Replace one-element arrays with flexible-array members Gustavo A. R. Silva
2022-03-15 4:02 ` Martin K. Petersen
2022-03-15 4:22 ` Gustavo A. R. Silva
2022-06-23 16:26 ` Kees Cook
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