From: Vincent Fu <vincent.fu@wdc.com>
Date: Tue, 19 Feb 2019 21:44:08 +0000 (-0500)
Subject: options: catch division by zero in setting CPU affinity
X-Git-Tag: fio-3.14~38
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=3a294b8704a4125f12e3c3dec36667e68d821be0

options: catch division by zero in setting CPU affinity

Catch a division by zero and abort with a helpful message instead of a
signal 8 floating point error.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/options.c b/options.c
index 6d832354..95086074 100644
--- a/options.c
+++ b/options.c
@@ -493,6 +493,9 @@ int fio_cpus_split(os_cpu_mask_t *mask, unsigned int cpu_index)
 	const long max_cpu = cpus_online();
 
 	cpus_in_mask = fio_cpu_count(mask);
+	if (!cpus_in_mask)
+		return 0;
+
 	cpu_index = cpu_index % cpus_in_mask;
 
 	index = 0;