diff options
| author | Justin Stitt <justinstitt@google.com> | 2023-09-27 05:10:54 +0000 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2023-11-01 10:02:14 +0000 |
| commit | 6bce629689f094bb7729ac77567a76763912b392 (patch) | |
| tree | 162de532f6bcd0cfcf37e2eae82e192e247d4502 /drivers/mfd | |
| parent | 61fdd1f1d2c183ec256527d16d75e75c3582af82 (diff) | |
| download | linux-6bce629689f094bb7729ac77567a76763912b392.tar.gz | |
mfd: db8500-prcmu: Replace deprecated strncpy with strscpy
`strncpy` is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string
interfaces.
We expect project_name to be NUL-terminated based on its use with
pr_info:
| pr_info("PRCMU firmware: %s(%d), version %d.%d.%d\n",
| fw_info.version.project_name,
| fw_info.version.project,
| fw_info.version.api_version,
| fw_info.version.func_version,
| fw_info.version.errata);
Moreover, NUL-padding does not seem to be needed.
Considering the above, a suitable replacement is `strscpy` [2] due to
the fact that it guarantees NUL-termination on the destination buffer
without unnecessarily NUL-padding.
Let's also change `PRCMU_FW_PROJECT_NAME_LEN` to just
sizeof(fw_info.version.project_name) as this is more idiomatic strscpy
usage.
Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2]
Link: https://github.com/KSPP/linux/issues/90
Cc: linux-hardening@vger.kernel.org
Signed-off-by: Justin Stitt <justinstitt@google.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230927-strncpy-drivers-mfd-db8500-prcmu-c-v1-1-db9693f92a68@google.com
Signed-off-by: Lee Jones <lee@kernel.org>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/db8500-prcmu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c index 27a881da4d6e6..5b3e355e78f6b 100644 --- a/drivers/mfd/db8500-prcmu.c +++ b/drivers/mfd/db8500-prcmu.c @@ -2639,9 +2639,9 @@ static void dbx500_fw_version_init(struct device_node *np) fw_info.version.api_version = (version >> 8) & 0xFF; fw_info.version.func_version = (version >> 16) & 0xFF; fw_info.version.errata = (version >> 24) & 0xFF; - strncpy(fw_info.version.project_name, + strscpy(fw_info.version.project_name, fw_project_name(fw_info.version.project), - PRCMU_FW_PROJECT_NAME_LEN); + sizeof(fw_info.version.project_name)); fw_info.valid = true; pr_info("PRCMU firmware: %s(%d), version %d.%d.%d\n", fw_info.version.project_name, |