[LU-12844] error: ‘strncpy’ specified bound depends on the length of the source argument

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.13.0, Lustre 2.12.4
• Severity: 3
• Assignee: Jian Yu
• Reporter: Jian Yu

Description

While building Lustre against kernel 4.19.67 on Debian 10, I hit the following failure:

liblnetconfig.c: In function ‘lustre_lnet_parse_nids’:
liblnetconfig.c:320:3: error: ‘strncpy’ specified bound depends on the length of the source argument [-Werror=stringop-overflow=]
   strncpy(entry, cur, len - 1);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
liblnetconfig.c:310:10: note: length computed here
    len = strlen(cur) + 1;
          ^~~~~~~~~~~
cc1: all warnings being treated as errors