[PATCH 5.15 099/244] perf probe: Fix an error handling path in parse_perf_probe_command()

[Greg Kroah-Hartman]

From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>

commit 4bf6dcaa93bcd083a13c278a91418fe10e6d23a0 upstream.

If a memory allocation fail, we should branch to the error handling path
in order to free some resources allocated a few lines above.

Fixes: 15354d54698648e2 ("perf probe: Generate event name with line number")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: kernel-janitors@xxxxxxxxxxxxxxx
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/b71bcb01fa0c7b9778647235c3ab490f699ba278.1659797452.git.christophe.jaillet@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 tools/perf/util/probe-event.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -1775,8 +1775,10 @@ int parse_perf_probe_command(const char
 	if (!pev->event && pev->point.function && pev->point.line
 			&& !pev->point.lazy_line && !pev->point.offset) {
 		if (asprintf(&pev->event, "%s_L%d", pev->point.function,
-			pev->point.line) < 0)
-			return -ENOMEM;
+			pev->point.line) < 0) {
+			ret = -ENOMEM;
+			goto out;
+		}
 	}
 
 	/* Copy arguments and ensure return probe has no C argument */