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

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Message-ID: <tencent_14375A4BEC7483764966023C0136D4968209@qq.com>
Date: Thu, 20 Feb 2025 07:13:11 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+df6cdcb35904203d2b6d@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [jfs?] KMSAN: uninit-value in diFree

#syz test

diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index a360b24ed320..0cedaccb7218 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -134,6 +134,10 @@ int diMount(struct inode *ipimap)
 		imap->im_agctl[index].numfree =
 		    le32_to_cpu(dinom_le->in_agctl[index].numfree);
 	}
+	imap->im_diskblock = 0;
+	imap->im_maxag = 0;
+	imap->im_enuminos = 0;
+	imap->im_enumfree = 0;
 
 	/* release the buffer. */
 	release_metapage(mp);
diff --git a/fs/jfs/jfs_imap.h b/fs/jfs/jfs_imap.h
index dd7409febe28..9af1da2e4591 100644
--- a/fs/jfs/jfs_imap.h
+++ b/fs/jfs/jfs_imap.h
@@ -144,6 +144,8 @@ struct inomap {
  */
 #define	im_diskblock	im_imap.in_diskblock
 #define	im_maxag	im_imap.in_maxag
+#define	im_enuminos	im_imap.in_numinos
+#define	im_enumfree	im_imap.in_numfree
 
 extern int diFree(struct inode *);
 extern int diAlloc(struct inode *, bool, struct inode *);
-- 
2.43.0