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Compilation issue - ‘__builtin_strncpy’ output may be truncated #233

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marpioch opened this issue Oct 7, 2021 · 0 comments

marpioch commented Oct 7, 2021

BUG REPORT:

Compilation issue:

How to reproduce it (as minimally and precisely as possible):
Issue make command

Anything else we need to know?:
Output:

In function ‘strncpy’,
    inlined from ‘pxd_fastpath_update’ at /root/workspace/px-fuse/pxd.c:1962:3:
./include/linux/string.h:245:9: error: ‘__builtin_strncpy’ output may be truncated copying 127 bytes from a string of length 255 [-Werror=stringop-truncation]
  245 |  return __builtin_strncpy(p, q, size);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

Environment:
gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0

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