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From: Edward Adam Davis <eadavis@qq.com>
To: syzbot+fe42a669c87e4a980051@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [ext4?] WARNING in ext4_xattr_inode_lookup_create
Date: Wed, 29 May 2024 08:14:09 +0800	[thread overview]
Message-ID: <tencent_A00DB025D08D8E12005DA45DED1965CF9C07@qq.com> (raw)
In-Reply-To: <0000000000002b03350619853096@google.com>

please test wr in ext4_xattr_inode_lookup_create

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 8f6a15f095a6

diff --git a/fs/dcache.c b/fs/dcache.c
index 407095188f83..e2f1a3f92ce9 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1551,8 +1551,8 @@ void shrink_dcache_for_umount(struct super_block *sb)
 	WARN(down_read_trylock(&sb->s_umount), "s_umount should've been locked");
 
 	dentry = sb->s_root;
-	sb->s_root = NULL;
 	do_one_tree(dentry);
+	sb->s_root = NULL;
 
 	while (!hlist_bl_empty(&sb->s_roots)) {
 		dentry = dget(hlist_bl_entry(hlist_bl_first(&sb->s_roots), struct dentry, d_hash));


  reply	other threads:[~2024-05-29  0:19 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-05-28 15:21 syzbot
2024-05-29  0:14 ` Edward Adam Davis [this message]
2024-05-29  0:53   ` syzbot
2024-05-29  1:15 ` [PATCH] fs/dcache: fix warning " Edward Adam Davis
2024-05-29  1:56   ` Al Viro
2024-05-29  2:01     ` Al Viro

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