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From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
To: syzbot <syzbot+d7521c1e3841ed075a42@syzkaller.appspotmail.com>,
	syzkaller-bugs@googlegroups.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: [syzbot] [virtualization?] KMSAN: uninit-value in virtqueue_add (4)
Date: Sat, 24 Feb 2024 23:03:12 +0900	[thread overview]
Message-ID: <c72f390a-47a1-4a2d-b789-223fbb5a3add@I-love.SAKURA.ne.jp> (raw)
In-Reply-To: <e34d2e40-de98-4736-bae9-7271fe9cf242@I-love.SAKURA.ne.jp>

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git v6.7

diff --git a/arch/x86/include/asm/page_64.h b/arch/x86/include/asm/page_64.h
index cc6b8e087192..f13bba3a9dab 100644
--- a/arch/x86/include/asm/page_64.h
+++ b/arch/x86/include/asm/page_64.h
@@ -58,7 +58,16 @@ static inline void clear_page(void *page)
 			   : "cc", "memory", "rax", "rcx");
 }
 
+#ifdef CONFIG_KMSAN
+/* Use of non-instrumented assembly version confuses KMSAN. */
+void *memcpy(void *to, const void *from, __kernel_size_t len);
+static inline void copy_page(void *to, void *from)
+{
+	memcpy(to, from, PAGE_SIZE);
+}
+#else
 void copy_page(void *to, void *from);
+#endif
 
 #ifdef CONFIG_X86_5LEVEL
 /*
-- 
2.34.1


  parent reply	other threads:[~2024-02-24 14:03 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-01-01 13:38 [syzbot] [virtualization?] KMSAN: uninit-value in virtqueue_add (4) syzbot
2024-01-02  7:38 ` Tetsuo Handa
2024-01-03  9:59   ` Tetsuo Handa
2024-02-21 11:04   ` Tetsuo Handa
2024-01-02  7:38 ` [syzbot] " syzbot
2024-01-02 13:03 ` Michael S. Tsirkin
2024-01-04 20:45   ` Stefan Hajnoczi
2024-01-24 10:47     ` Alexander Potapenko
2024-01-24 21:25       ` Stefan Hajnoczi
2024-01-26  0:43 ` Edward Adam Davis
2024-01-26  1:26   ` [syzbot] [mm] " syzbot
2024-01-26  1:35 ` [syzbot] [virtualization?] " Edward Adam Davis
2024-01-26  1:43   ` [syzbot] [mm] " syzbot
2024-01-26 10:19   ` [syzbot] [virtualization?] " Alexander Potapenko
2024-01-26  6:57 ` Edward Adam Davis
2024-01-26  7:34   ` [syzbot] [mm] " syzbot
2024-02-24  5:53 ` [syzbot] [virtualization?] " Tetsuo Handa
2024-02-24  6:22   ` [syzbot] [mm] " syzbot
2024-02-24 10:47   ` [syzbot] [virtualization?] " Tetsuo Handa
2024-02-24 11:19     ` [syzbot] [mm] " syzbot
2024-02-24 14:03     ` Tetsuo Handa [this message]
2024-02-24 14:24       ` syzbot
2024-02-25  0:01       ` [syzbot] [virtualization?] " Tetsuo Handa
2024-02-25  0:21         ` [syzbot] [mm] " syzbot
2024-02-25  0:27 ` [syzbot] [virtualization?] " Edward Adam Davis
2024-02-25  0:52   ` [syzbot] [mm] " syzbot
2024-02-25  1:50 ` [syzbot] Re: [syzbot] [virtualization?] " syzbot
2024-02-25  2:42 ` syzbot
2024-02-25  3:59 ` syzbot
2024-03-06 13:14 ` syzbot
2024-03-26 10:35 ` Tetsuo Handa

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