From: Hillf Danton <hdanton@sina.com>
To: syzbot <syzbot+c1751b6739d83d70bb75@syzkaller.appspotmail.com>
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [ntfs3?] possible deadlock in ntfs_file_mmap
Date: Sun, 28 Jul 2024 06:40:40 +0800 [thread overview]
Message-ID: <20240727224040.2248-1-hdanton@sina.com> (raw)
In-Reply-To: <00000000000038f243061e3ad3fe@google.com>
On Sat, 27 Jul 2024 06:44:20 -0700
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: 2f8c4f506285 Merge tag 'auxdisplay-for-v6.11-tag1' of git:..
> git tree: upstream
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12e875a1980000
#syz test upstream 2f8c4f506285
--- x/fs/ntfs3/file.c
+++ y/fs/ntfs3/file.c
@@ -365,7 +365,10 @@ static int ntfs_file_mmap(struct file *f
}
if (ni->i_valid < to) {
- inode_lock(inode);
+ if (!inode_trylock(inode)) {
+ err = -EDEADLK;
+ goto out;
+ }
err = ntfs_extend_initialized_size(file, ni,
ni->i_valid, to);
inode_unlock(inode);
--
next prev parent reply other threads:[~2024-07-27 22:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-15 7:17 [syzbot] [ntfs3?] possible deadlock in ntfs_file_mmap syzbot
2024-07-27 13:44 ` syzbot
2024-07-27 22:40 ` Hillf Danton [this message]
2024-07-27 23:03 ` syzbot
2024-07-27 21:30 ` syzbot
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