From: Oliver Neukum <oneukum@suse.com>
To: syzbot <syzbot+fd9d03311cdce9a9ec36@syzkaller.appspotmail.com>,
andreyknvl@google.com, linux-usb@vger.kernel.org,
syzkaller-bugs@googlegroups.com, thomas@winischhofer.net
Subject: Re: [syzbot] INFO: task hung in sisusb_open
Date: Wed, 27 Oct 2021 11:52:30 +0200 [thread overview]
Message-ID: <bf8eefe4-7fe1-002f-8258-10a3e825856a@suse.com> (raw)
In-Reply-To: <000000000000c87fc005cef26865@google.com>
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On 22.10.21 17:10, syzbot wrote:
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: 2f111a6fd5b5 Merge tag 'ceph-for-5.15-rc7' of git://github..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=15a3aaf0b00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=61f4d9af07d3bbdf
> dashboard link: https://syzkaller.appspot.com/bug?extid=fd9d03311cdce9a9ec36
> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13d4e9fcb00000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1444ada4b00000
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git 2f111a6fd5b5
[-- Attachment #2: sisusb_debug.patch --]
[-- Type: text/x-patch, Size: 510 bytes --]
diff --git a/drivers/usb/misc/sisusbvga/sisusb.c b/drivers/usb/misc/sisusbvga/sisusb.c
index f08de33d9ff3..de30fb85ceda 100644
--- a/drivers/usb/misc/sisusbvga/sisusb.c
+++ b/drivers/usb/misc/sisusbvga/sisusb.c
@@ -251,7 +251,8 @@ static int sisusb_bulkout_msg(struct sisusb_usb_data *sisusb, int index,
retval = urb->status;
byteswritten = urb->actual_length;
}
- }
+ } else if (timeout == 0)
+ printk(KERN_ERR"Message without timeout\n");
if (actual_length)
*actual_length = byteswritten;
next prev parent reply other threads:[~2021-10-27 9:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-06 15:22 INFO: task hung in sisusb_open syzbot
2021-10-22 15:10 ` [syzbot] " syzbot
2021-10-25 14:40 ` Oliver Neukum
2021-10-27 6:27 ` Dmitry Vyukov
2021-10-27 9:52 ` Oliver Neukum [this message]
2021-10-27 12:28 ` syzbot
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