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Subject[PATCH] net: bonding: Use strscpy() instead of manually-truncated strncpy()
Date
Silence this warning by just using strscpy() directly:

drivers/net/bonding/bond_main.c:4877:3: warning: 'strncpy' specified bound 16 equals destination size [-Wstringop-truncation]
4877 | strncpy(params->primary, primary, IFNAMSIZ);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/lkml/202102150705.fdR6obB0-lkp@intel.com
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/net/bonding/bond_main.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index c5a646d06102..ecfc48f2d0d0 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -5329,10 +5329,8 @@ static int bond_check_params(struct bond_params *params)
(struct reciprocal_value) { 0 };
}

- if (primary) {
- strncpy(params->primary, primary, IFNAMSIZ);
- params->primary[IFNAMSIZ - 1] = 0;
- }
+ if (primary)
+ strscpy(params->primary, primary, sizeof(params->primary));

memcpy(params->arp_targets, arp_target, sizeof(arp_target));

--
2.25.1
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