From: Arnaldo Carvalho de Melo acme@redhat.com
stable inclusion from linux-4.19.198 commit e3bed778ac53a494415eb98263b969b941aacb96
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[ Upstream commit c435c166dcf526ac827bc964d82cc0d5e7a1fd0b ]
Zhihao sent a patch but it made llvm__compile_bpf() return what asprintf() returns on error, which is just -1, but since this function returns -errno, fix it by returning -ENOMEM for this case instead.
Fixes: cb76371441d098 ("perf llvm: Allow passing options to llc ...") Fixes: 5eab5a7ee032ac ("perf llvm: Display eBPF compiling command ...") Reported-by: Hulk Robot hulkci@huawei.com Reported-by: Zhihao Cheng chengzhihao1@huawei.com Cc: Alexei Starovoitov ast@kernel.org Cc: Andrii Nakryiko andrii@kernel.org Cc: Daniel Borkmann daniel@iogearbox.net Cc: Ingo Molnar mingo@redhat.com Cc: Jiri Olsa jolsa@redhat.com Cc: Nathan Chancellor nathan@kernel.org Cc: Nick Desaulniers ndesaulniers@google.com Cc: Peter Zijlstra peterz@infradead.org Cc: Yu Kuai yukuai3@huawei.com Cc: clang-built-linux@googlegroups.com Link: http://lore.kernel.org/lkml/20210609115945.2193194-1-chengzhihao1@huawei.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- tools/perf/util/llvm-utils.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c index 2344d86cd7786..46ec9a1bb94cc 100644 --- a/tools/perf/util/llvm-utils.c +++ b/tools/perf/util/llvm-utils.c @@ -500,6 +500,7 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf, goto errout; }
+ err = -ENOMEM; if (asprintf(&pipe_template, "%s -emit-llvm | %s -march=bpf %s -filetype=obj -o -", template, llc_path, opts) < 0) { pr_err("ERROR:\tnot enough memory to setup command line\n"); @@ -520,6 +521,7 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf,
pr_debug("llvm compiling command template: %s\n", template);
+ err = -ENOMEM; if (asprintf(&command_echo, "echo -n "%s"", template) < 0) goto errout;