linux-kernel - Re: [syzbot] Re: KMSAN: uninit-value in f2fs_new_node

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Message-ID: <674f31c3.050a0220.17bd51.0048.GAE@google.com>
Date: Tue, 03 Dec 2024 08:28:51 -0800
From: syzbot <syzbot+5141f6db57a2f7614352@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] Re: KMSAN: uninit-value in f2fs_new_node_page()

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Subject: Re: KMSAN: uninit-value in f2fs_new_node_page()
Author: dmantipov@...dex.ru

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git cdd30ebb1b9f36159d66f088b61aee264e649d7a

diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 6aea13024ac1..7371c09174cb 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -105,6 +105,7 @@ static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type)
 
 static inline void nat_reset_flag(struct nat_entry *ne)
 {
+	ne->ni.flag = 0;
 	/* these states can be set only after checkpoint was done */
 	set_nat_flag(ne, IS_CHECKPOINTED, true);
 	set_nat_flag(ne, HAS_FSYNCED_INODE, false);
@@ -117,6 +118,7 @@ static inline void node_info_from_raw_nat(struct node_info *ni,
 	ni->ino = le32_to_cpu(raw_ne->ino);
 	ni->blk_addr = le32_to_cpu(raw_ne->block_addr);
 	ni->version = raw_ne->version;
+	ni->flag = 0;
 }
 
 static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne,