[LU-12999] gcc8 compile warning on string overflow in name_create_mdt

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0, Lustre 2.12.7
• Severity: 3
• Assignee: Shaun Tancheff
• Reporter: Shaun Tancheff

Description

 

/home/shaun/lustre-wc-rel/lustre/mgs/mgs_llog.c:1539:2: note: ‘sprintf’ output between 9 and 10 bytes into a destination of size 9
 sprintf(mdt_index, "-MDT%04x", i);
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/shaun/lustre-wc-rel/lustre/mgs/mgs_llog.c:1539:30: error: ‘sprintf’ may write a terminating nul past the end of the destination [-Werror=format-overflow=]
 sprintf(mdt_index, "-MDT%04x", i);