linux-kernel - Re: [syzbot] INFO: rcu detected stall in syscall_exit_to_user

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Date: Fri,  8 Mar 2024 18:33:36 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+a68ef3b1f46bc3aced5c@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] INFO: rcu detected stall in syscall_exit_to_user_mode (2)

On Sun, 25 Dec 2022 17:42:37 -0800
> syzbot has found a reproducer for the following issue on:
> 
> HEAD commit:    72a85e2b0a1e Merge tag 'spi-fix-v6.2-rc1' of git://git.ker..
> git tree:       upstream
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12569d7f880000

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

--- x/drivers/media/rc/imon.c
+++ y/drivers/media/rc/imon.c
@@ -1758,6 +1758,7 @@ static void usb_rx_callback_intf0(struct
 
 	switch (urb->status) {
 	case -ENOENT:		/* usbcore unlink successful! */
+	case -EPROTO:
 		return;
 
 	case -ESHUTDOWN:	/* transport endpoint was shut down */
--