Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH 4/5] scsi: mpi3mr: Avoid possible run-time warning with long manufacturer strings | Date | Tue, 9 Apr 2024 19:31:53 -0700 |
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The prior use of strscpy() here expected the manufacture_reply strings to be NUL-terminated, but it is possible they are not, as the code pattern here shows, e.g., edev->vendor_id being exactly 1 character larger than manufacture_reply->vendor_id, and the strscpy() was copying only up to the size of the source character array. Replace this with memtostr(), which is the unambiguous way to convert a maybe not-NUL-terminated character array into a NUL-terminated string.
Fixes: 2bd37e284914 ("scsi: mpi3mr: Add framework to issue MPT transport cmds") Signed-off-by: Kees Cook <keescook@chromium.org> --- Cc: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Cc: Sathya Prakash Veerichetty <sathya.prakash@broadcom.com> Cc: Kashyap Desai <kashyap.desai@broadcom.com> Cc: Sumit Saxena <sumit.saxena@broadcom.com> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: mpi3mr-linuxdrv.pdl@broadcom.com Cc: linux-scsi@vger.kernel.org --- drivers/scsi/mpi3mr/mpi3mr_transport.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/scsi/mpi3mr/mpi3mr_transport.c b/drivers/scsi/mpi3mr/mpi3mr_transport.c index dabb91f0f75d..3caceddb864a 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_transport.c +++ b/drivers/scsi/mpi3mr/mpi3mr_transport.c @@ -211,17 +211,13 @@ static int mpi3mr_report_manufacture(struct mpi3mr_ioc *mrioc, goto out; } - strscpy(edev->vendor_id, manufacture_reply->vendor_id, - SAS_EXPANDER_VENDOR_ID_LEN); - strscpy(edev->product_id, manufacture_reply->product_id, - SAS_EXPANDER_PRODUCT_ID_LEN); - strscpy(edev->product_rev, manufacture_reply->product_rev, - SAS_EXPANDER_PRODUCT_REV_LEN); + memtostr(edev->vendor_id, manufacture_reply->vendor_id); + memtostr(edev->product_id, manufacture_reply->product_id); + memtostr(edev->product_rev, manufacture_reply->product_rev); edev->level = manufacture_reply->sas_format & 1; if (edev->level) { - strscpy(edev->component_vendor_id, - manufacture_reply->component_vendor_id, - SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN); + memtostr(edev->component_vendor_id, + manufacture_reply->component_vendor_id); tmp = (u8 *)&manufacture_reply->component_id; edev->component_id = tmp[0] << 8 | tmp[1]; edev->component_revision_id = -- 2.34.1
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