[PATCH stalld 51/52] stalld: fix error return in queue_track_get_cpu

queue_track_get_cpu() returns 1 when the buffer is too small to hold
a stalld_cpu_data structure. Because callers treat any positive return
as a successful read, the parsing stage proceeds on a buffer that was
never filled, reading uninitialized memory. Return 0 instead so the
caller recognizes the failure and retries with the enlarged buffer on
the next monitoring cycle.

Signed-off-by: Wander Lairson Costa <[email protected]>
---
 src/queue_track.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/queue_track.c b/src/queue_track.c
index 2c1a11b..a1a127a 100644
--- a/src/queue_track.c
+++ b/src/queue_track.c
@@ -137,7 +137,7 @@ static int queue_track_get_cpu(char *buffer, int size, int cpu)
 		config_buffer_size = sizeof(struct stalld_cpu_data);
 		log_msg("queue_track is larger than the buffer, increasing the buffer to %zu\n",
 			config_buffer_size);
-		return 1;
+		return 0;
 	}
 
 	retval = get_cpu_data((struct stalld_cpu_data *) buffer, cpu);
-- 
2.54.0