linux-kernel - Re: [syzbot] [exfat?] KMSAN: kernel-infoleak in pipe

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Message-Id: <20241031124205.10372-1-aha310510@gmail.com>
Date: Thu, 31 Oct 2024 21:42:05 +0900
From: Jeongjun Park <aha310510@...il.com>
To: syzbot+41ebd857f013384237a9@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org
Subject: Re: [syzbot] [exfat?] KMSAN: kernel-infoleak in pipe_read

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

---
 fs/pipe.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/pipe.c b/fs/pipe.c
index 12b22c2723b7..596780490a32 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -324,6 +324,7 @@ pipe_read(struct kiocb *iocb, struct iov_iter *to)
 				break;
 			}
 
+			printk(KERN_INFO "%p %u %lu", &buf->page, buf->offset, chars);
 			written = copy_page_to_iter(buf->page, buf->offset, chars, to);
 			if (unlikely(written < chars)) {
 				if (!ret)
--