strncpy() is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string
interfaces.
Based on the deliberate `sizeof(dest) ... - 1` pattern we can see that
both dump_info->dev_human_readable and dump_info->bus_human_readable are
intended to be NUL-terminated.
Neither of these symbols seem to be actually used after being assigned.
Which means our replacement doesn't really matter. At any rate, it would
seem NUL-padding is not required so let's use `strscpy` [2] due to the
fact that it guarantees NUL-termination on the destination buffer
without unnecessarily NUL-padding. (but maybe these should be
used or removed).
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: [email protected]
Signed-off-by: Justin Stitt <[email protected]>
---
Note: build-tested only.
Found with: $ rg "strncpy\("
---
drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
index 3ab6a68f1e9f..5455f8d1aab0 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -880,10 +880,10 @@ iwl_fw_error_dump_file(struct iwl_fw_runtime *fwrt,
cpu_to_le32(fwrt->trans->hw_rev_step);
memcpy(dump_info->fw_human_readable, fwrt->fw->human_readable,
sizeof(dump_info->fw_human_readable));
- strncpy(dump_info->dev_human_readable, fwrt->trans->name,
- sizeof(dump_info->dev_human_readable) - 1);
- strncpy(dump_info->bus_human_readable, fwrt->dev->bus->name,
- sizeof(dump_info->bus_human_readable) - 1);
+ strscpy(dump_info->dev_human_readable, fwrt->trans->name,
+ sizeof(dump_info->dev_human_readable));
+ strscpy(dump_info->bus_human_readable, fwrt->dev->bus->name,
+ sizeof(dump_info->bus_human_readable));
dump_info->num_of_lmacs = fwrt->smem_cfg.num_lmacs;
dump_info->lmac_err_id[0] =
cpu_to_le32(fwrt->dump.lmac_err_id[0]);
---
base-commit: 58720809f52779dc0f08e53e54b014209d13eebb
change-id: 20231017-strncpy-drivers-net-wireless-intel-iwlwifi-fw-dbg-c-1f49f00b8a2e
Best regards,
--
Justin Stitt <[email protected]>