From: Edward Adam Davis <eadavis@qq.com>
To: syzbot+ab57f676a518849a8d57@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [nilfs?] general protection fault in __d_unalias
Date: Tue, 4 Feb 2025 08:10:08 +0800 [thread overview]
Message-ID: <tencent_38DDE8DD931974CFDA0DABA5B08DF9927907@qq.com> (raw)
In-Reply-To: <67a1111a.050a0220.d7c5a.00a4.GAE@google.com>
#syz test
diff --git a/fs/dcache.c b/fs/dcache.c
index 9cc0d47da321..96b21a47312e 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2966,11 +2966,11 @@ static int __d_unalias(struct dentry *dentry, struct dentry *alias)
goto out_err;
m2 = &alias->d_parent->d_inode->i_rwsem;
out_unalias:
- if (alias->d_op->d_unalias_trylock &&
+ if (alias->d_op && alias->d_op->d_unalias_trylock &&
!alias->d_op->d_unalias_trylock(alias))
goto out_err;
__d_move(alias, dentry, false);
- if (alias->d_op->d_unalias_unlock)
+ if (alias->d_op && alias->d_op->d_unalias_unlock)
alias->d_op->d_unalias_unlock(alias);
ret = 0;
out_err:
next prev parent reply other threads:[~2025-02-04 0:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-03 18:55 syzbot
2025-02-04 0:10 ` Edward Adam Davis [this message]
2025-02-04 1:14 ` syzbot
2025-02-04 2:20 ` Ryusuke Konishi
2025-02-03 19:48 [syzbot] [udf?] general protection fault in d_splice_alias syzbot
2025-02-04 0:10 ` [syzbot] [nilfs?] general protection fault in __d_unalias Edward Adam Davis
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