diff options
| author | Kees Cook <keescook@chromium.org> | 2022-02-07 22:12:31 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-02-11 16:42:22 -0500 |
| commit | 03e4383c7ce36ac400489c8fe84724470a8251e9 (patch) | |
| tree | caaa77b8488172fa88bbd630a4e6d755ffa8d65c /drivers/scsi/ibmvscsi_tgt | |
| parent | 49b729f58e7a98a006a8a0c1dcca8a1a4f58d2a8 (diff) | |
| download | lwn-03e4383c7ce36ac400489c8fe84724470a8251e9.tar.gz lwn-03e4383c7ce36ac400489c8fe84724470a8251e9.zip | |
scsi: ibmvscsis: Silence -Warray-bounds warning
Instead of doing a cast to storage that is too small, add a union for the
high 64 bits. Silences the warnings under -Warray-bounds:
drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c: In function 'ibmvscsis_send_messages':
drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c:1934:44: error: array subscript 'struct viosrp_crq[0]' is partly outside array bounds of 'u64[1]' {aka 'long long unsigned int[1]'} [-Werror=array-bounds]
1934 | crq->valid = VALID_CMD_RESP_EL;
| ^~
drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c:1875:13: note: while referencing 'msg_hi'
1875 | u64 msg_hi = 0;
| ^~~~~~
There is no change to the resulting binary instructions.
Link: https://lore.kernel.org/lkml/20220125142430.75c3160e@canb.auug.org.au
Link: https://lore.kernel.org/r/20220208061231.3429486-1-keescook@chromium.org
Cc: Michael Cyr <mikecyr@linux.ibm.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Tyrel Datwyler <tyreld@linux.ibm.com>
Cc: linux-scsi@vger.kernel.org
Cc: target-devel@vger.kernel.org
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/ibmvscsi_tgt')
| -rw-r--r-- | drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c index 61f06f6885a5..80238e6a3c98 100644 --- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c +++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c @@ -1872,11 +1872,8 @@ static void srp_snd_msg_failed(struct scsi_info *vscsi, long rc) */ static void ibmvscsis_send_messages(struct scsi_info *vscsi) { - u64 msg_hi = 0; - /* note do not attempt to access the IU_data_ptr with this pointer - * it is not valid - */ - struct viosrp_crq *crq = (struct viosrp_crq *)&msg_hi; + struct viosrp_crq empty_crq = { }; + struct viosrp_crq *crq = &empty_crq; struct ibmvscsis_cmd *cmd, *nxt; long rc = ADAPT_SUCCESS; bool retry = false; @@ -1940,7 +1937,7 @@ static void ibmvscsis_send_messages(struct scsi_info *vscsi) crq->IU_length = cpu_to_be16(cmd->rsp.len); rc = h_send_crq(vscsi->dma_dev->unit_address, - be64_to_cpu(msg_hi), + be64_to_cpu(crq->high), be64_to_cpu(cmd->rsp.tag)); dev_dbg(&vscsi->dev, "send_messages: cmd %p, tag 0x%llx, rc %ld\n", |