lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <tencent_9DB87AFA6C9C2D756D849410E9FEEC26CF0A@qq.com>
Date: Wed, 31 Jan 2024 19:53:52 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+2373f6be3e6de4f92562@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [block?] [trace?] INFO: task hung in blk_trace_remove (2)

please test task hung in blk_trace_remove

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

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index d5d94510afd3..4543be718362 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -313,6 +313,7 @@ static void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes,
 
 static void blk_trace_free(struct request_queue *q, struct blk_trace *bt)
 {
+	mutex_unlock(&q->debugfs_mutex);
 	relay_close(bt->rchan);
 
 	/*
@@ -325,6 +326,7 @@ static void blk_trace_free(struct request_queue *q, struct blk_trace *bt)
 	} else {
 		debugfs_remove(bt->dir);
 	}
+	mutex_lock(&q->debugfs_mutex);
 	free_percpu(bt->sequence);
 	free_percpu(bt->msg_data);
 	kfree(bt);
-- 
2.43.0


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ