kernel_optimize_test/tools/lib/api/fs
Andrey Zhizhikin 6794200fa3 tools lib api fs: Fix gcc9 stringop-truncation compilation error
GCC9 introduced string hardening mechanisms, which exhibits the error
during fs api compilation:

error: '__builtin_strncpy' specified bound 4096 equals destination size
[-Werror=stringop-truncation]

This comes when the length of copy passed to strncpy is is equal to
destination size, which could potentially lead to buffer overflow.

There is a need to mitigate this potential issue by limiting the size of
destination by 1 and explicitly terminate the destination with NULL.

Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Cc: bpf@vger.kernel.org
Cc: netdev@vger.kernel.org
Link: http://lore.kernel.org/lkml/20191211080109.18765-1-andrey.zhizhikin@leica-geosystems.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2020-01-06 11:46:09 -03:00
..
Build tools lib api fs: Remove debugfs, tracefs and findfs objects 2015-09-14 12:50:15 -03:00
fs.c tools lib api fs: Fix gcc9 stringop-truncation compilation error 2020-01-06 11:46:09 -03:00
fs.h tools lib api fs: Add sysfs__read_xll function 2018-02-16 10:09:23 -03:00
tracing_path.c perf tools: Fix tracing_path_mount proper path 2018-10-16 12:27:46 -03:00
tracing_path.h tools lib api fs tracing_path: Make tracing_events_path private 2018-05-17 14:51:23 -03:00