lkml.org 
[lkml]   [2020]   [Oct]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [PATCH] perf: increase size of buf in perf_evsel__hists_browse()
Date
From: Song Liu
> Sent: 30 October 2020 23:55
>
> Making perf with gcc-9.1.1 generates the following warning:
>
> CC ui/browsers/hists.o
> ui/browsers/hists.c: In function 'perf_evsel__hists_browse':
> ui/browsers/hists.c:3078:61: error: '%d' directive output may be \
> truncated writing between 1 and 11 bytes into a region of size \
> between 2 and 12 [-Werror=format-truncation=]
>
> 3078 | "Max event group index to sort is %d (index from 0 to %d)",
> | ^~
> ui/browsers/hists.c:3078:7: note: directive argument in the range [-2147483648, 8]
> 3078 | "Max event group index to sort is %d (index from 0 to %d)",
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In file included from /usr/include/stdio.h:937,
> from ui/browsers/hists.c:5:
>
> IOW, the string in line 3078 might be too long for buf[] of 64 bytes.
>
> Fix this by increasing the size of buf[] to 128.

ISTM that something should be unsigned so that the bound check
that puts an upper bound of 8 implies a lower bound.

David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)

\
 
 \ /
  Last update: 2020-10-31 12:28    [W:0.641 / U:0.428 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site