perf traceevent: Ensure read cmdlines are null terminated.
stable inclusion from stable-5.10.24 commit 57a798e4a197a3d6f559b38397168988e952828d bugzilla: 51348 -------------------------------- commit 137a5258 upstream. Issue detected by address sanitizer. Fixes: cd4ceb63 ("perf util: Save pid-cmdline mapping into tracing header") Signed-off-by: NIan Rogers <irogers@google.com> Acked-by: NNamhyung Kim <namhyung@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20210226221431.1985458-1-irogers@google.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NChen Jun <chenjun102@huawei.com> Acked-by: N Weilong Chen <chenweilong@huawei.com> Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
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