From: Edward Adam Davis <eadavis@qq.com>
To: syzbot+c041985778e4069e1ce3@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [fs?] WARNING: bad unlock balance in seq_read_iter
Date: Sat, 1 Feb 2025 13:30:01 +0800 [thread overview]
Message-ID: <tencent_C95D9CDDB01966CFA00DC1A5898D84920707@qq.com> (raw)
In-Reply-To: <679d36da.050a0220.163cdc.0010.GAE@google.com>
#syz test
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 4cb275316e51..dad032912e1e 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -1600,11 +1600,12 @@ static void *s_start(struct seq_file *m, loff_t *pos)
struct set_event_iter *iter;
loff_t l;
+ mutex_lock(&event_mutex);
+
iter = kzalloc(sizeof(*iter), GFP_KERNEL);
- if (!iter)
+ if (!iter) {
return NULL;
-
- mutex_lock(&event_mutex);
+ }
iter->type = SET_EVENT_FILE;
iter->file = list_entry(&tr->events, struct trace_event_file, list);
next prev parent reply other threads:[~2025-02-01 5:38 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-31 20:47 syzbot
2025-02-01 1:04 ` Edward Adam Davis
2025-02-01 1:24 ` syzbot
2025-02-01 2:27 ` Edward Adam Davis
2025-02-01 2:48 ` syzbot
2025-02-01 3:43 ` Edward Adam Davis
2025-02-01 4:04 ` syzbot
2025-02-01 5:30 ` Edward Adam Davis [this message]
2025-02-01 5:50 ` syzbot
2025-02-01 5:50 ` [PATCH] tracing: keep the event lock balanced Edward Adam Davis
[not found] <tencent_58E8BAED46CE2479A26D8C2E716D5895940A@qq.com>
2025-02-01 2:03 ` [syzbot] [fs?] WARNING: bad unlock balance in seq_read_iter syzbot
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