From: Ankit Kumar <ankit.kumar@samsung.com>
Date: Fri, 21 Oct 2022 06:49:00 +0000 (+0530)
Subject: stat: fix segfault with fio option --bandwidth-log
X-Git-Tag: fio-3.33~11
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=d72244761b2230fbb2d6eaec59cdedd3ea651d4f;p=fio.git

stat: fix segfault with fio option --bandwidth-log

The log_params for aggregate read, write and trim only specify
log type. As a result the io_log doesn't have the relevant
thread_data structure. With fio option --bandwidth-log this results
in segmentation fault.
Add a check and use DEF_LOG_ENTRIES for such case.

Fixes: 0a852a50 ("fio: Introduce the log_entries option")
Signed-off-by: Ankit Kumar <ankit.kumar@samsung.com>
[vkf: added Fixes tag, lightly edited commit message]
Signed-off-by: Vincent Fu <vincent.fu@samsung.com>
---

diff --git a/stat.c b/stat.c
index 949af5ed..b963973a 100644
--- a/stat.c
+++ b/stat.c
@@ -2870,7 +2870,10 @@ static struct io_logs *get_new_log(struct io_log *iolog)
 	 * forever
 	 */
 	if (!iolog->cur_log_max) {
-		new_samples = iolog->td->o.log_entries;
+		if (iolog->td)
+			new_samples = iolog->td->o.log_entries;
+		else
+			new_samples = DEF_LOG_ENTRIES;
 	} else {
 		new_samples = iolog->cur_log_max * 2;
 		if (new_samples > MAX_LOG_ENTRIES)