linux-kernel - Re: [syzbot] Re: [syzbot] [kernel?] KMSAN: uninit-value in profile

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Date: Fri, 29 Dec 2023 21:38:14 -0800
From: syzbot <syzbot+b1a83ab2a9eb9321fbdd@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org
Subject: Re: [syzbot] Re: [syzbot] [kernel?] KMSAN: uninit-value in
 profile_hits (3)

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Subject: Re: [syzbot] [kernel?] KMSAN: uninit-value in profile_hits (3)
Author: eadavis@...com

please test uninit-value in profile_hits

#syz test https://github.com/google/kmsan.git master

diff --git a/kernel/profile.c b/kernel/profile.c
index 8a77769bc4b4..37f30292b626 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -114,7 +114,7 @@ int __ref profile_init(void)
 
 	buffer_bytes = prof_len*sizeof(atomic_t);
 
-	if (!alloc_cpumask_var(&prof_cpu_mask, GFP_KERNEL))
+	if (!zalloc_cpumask_var(&prof_cpu_mask, GFP_KERNEL))
 		return -ENOMEM;
 
 	cpumask_copy(prof_cpu_mask, cpu_possible_mask);