diff options
| author | Kees Cook <keescook@chromium.org> | 2024-04-10 05:31:51 +0300 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2024-04-25 20:41:19 +0300 |
| commit | 5bb288c4abc2e67d4ea94ba6bc80bb0ab18b123e (patch) | |
| tree | 7a9b13fccdcb3968cda1505a8d25d0207412249d | |
| parent | f700b71927017ca5697e8a24fd2ad5d3e06489d6 (diff) | |
| download | linux-5bb288c4abc2e67d4ea94ba6bc80bb0ab18b123e.tar.xz | |
scsi: mptfusion: Avoid possible run-time warning with long manufacturer strings
The prior strscpy() replacement of strncpy() 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 replaced strncpy() 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.
Reported-by: Charles Bertsch <cbertsch@cox.net>
Closes: https://lore.kernel.org/all/5445ba0f-3e27-4d43-a9ba-0cc22ada2fce@cox.net/
Fixes: 45e833f0e5bb ("scsi: message: fusion: Replace deprecated strncpy() with strscpy()")
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240410023155.2100422-2-keescook@chromium.org
Signed-off-by: Kees Cook <keescook@chromium.org>
| -rw-r--r-- | drivers/message/fusion/mptsas.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c index 300f8e955a53..0f80c840afc3 100644 --- a/drivers/message/fusion/mptsas.c +++ b/drivers/message/fusion/mptsas.c @@ -2964,17 +2964,13 @@ mptsas_exp_repmanufacture_info(MPT_ADAPTER *ioc, goto out_free; manufacture_reply = data_out + sizeof(struct rep_manu_request); - strscpy(edev->vendor_id, manufacture_reply->vendor_id, - sizeof(edev->vendor_id)); - strscpy(edev->product_id, manufacture_reply->product_id, - sizeof(edev->product_id)); - strscpy(edev->product_rev, manufacture_reply->product_rev, - sizeof(edev->product_rev)); + 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; if (manufacture_reply->sas_format) { - strscpy(edev->component_vendor_id, - manufacture_reply->component_vendor_id, - sizeof(edev->component_vendor_id)); + 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 = |