linux-kernel - Re: [syzbot] [bluetooth?] BUG: sleeping function called from invalid context in hci_le_create_big_complete

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Date: Sun,  7 Apr 2024 20:16:09 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+2fb0835e0c9cefc34614@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bluetooth?] BUG: sleeping function called from invalid context in hci_le_create_big_complete_evt

On Sun, 07 Apr 2024 04:33:29 -0700
> syzbot found the following issue on:
> 
> HEAD commit:    480e035fc4c7 Merge tag 'drm-next-2024-03-13' of https://gi..
> git tree:       upstream
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11ee2e75180000

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git  480e035fc4c7

--- x/net/bluetooth/hci_event.c
+++ y/net/bluetooth/hci_event.c
@@ -6936,8 +6936,8 @@ static void hci_le_create_big_complete_e
 			continue;
 		}
 
-		hci_connect_cfm(conn, ev->status);
 		rcu_read_unlock();
+		hci_connect_cfm(conn, ev->status);
 		hci_conn_del(conn);
 		rcu_read_lock();
 	}
--