From: Miklos Szeredi <miklos@szeredi.hu>
To: syzbot <syzbot+9f747458f5990eaa8d43@syzkaller.appspotmail.com>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs <syzkaller-bugs@googlegroups.com>
Subject: Re: [syzbot] possible deadlock in fuse_reverse_inval_entry
Date: Tue, 7 Sep 2021 17:24:56 +0200 [thread overview]
Message-ID: <CAJfpegvr1y9VTXb3Gm2F1Y9mZzWYAEYutV8kdhnD2Yyo8FTvcQ@mail.gmail.com> (raw)
In-Reply-To: <000000000000a4cc9405c95d0e1c@google.com>
[-- Attachment #1: Type: text/plain, Size: 83 bytes --]
#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
master
[-- Attachment #2: fuse-annotate-lock-in-inval_entry.patch --]
[-- Type: text/x-patch, Size: 610 bytes --]
From: Miklos Szeredi <mszeredi@redhat.com>
Subject: fuse: annotate lock in fuse_reverse_inval_entry()
Add missing inode lock annotatation; found by syzbot.
Reported-by: syzbot+9f747458f5990eaa8d43@syzkaller.appspotmail.com
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
fs/fuse/dir.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1071,7 +1071,7 @@ int fuse_reverse_inval_entry(struct fuse
if (!parent)
return -ENOENT;
- inode_lock(parent);
+ inode_lock_nested(parent, I_MUTEX_PARENT);
if (!S_ISDIR(parent->i_mode))
goto unlock;
next prev parent reply other threads:[~2021-09-07 15:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-12 13:53 [syzbot] possible deadlock in fuse_reverse_inval_entry syzbot
2021-09-07 15:24 ` Miklos Szeredi [this message]
2021-09-07 23:45 ` syzbot
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