From: Hillf Danton <hdanton@sina.com>
To: syzbot <syzbot+5cd373521edd68bebcb3@syzkaller.appspotmail.com>
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [kernel?] UBSAN: shift-out-of-bounds in pcl726_attach
Date: Sat, 5 Jul 2025 20:47:11 +0800 [thread overview]
Message-ID: <20250705124712.2637-1-hdanton@sina.com> (raw)
In-Reply-To: <68690648.a00a0220.c7b3.0037.GAE@google.com>
> Date: Sat, 05 Jul 2025 04:02:32 -0700
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: c435a4f487e8 Merge tag 'riscv-for-linus-6.16-rc5' of git:/..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=14ea4f70580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=5ba6cef8f153bfeb
> dashboard link: https://syzkaller.appspot.com/bug?extid=5cd373521edd68bebcb3
> compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1116c582580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12ea4f70580000
#syz test
--- x/drivers/comedi/drivers/pcl726.c
+++ y/drivers/comedi/drivers/pcl726.c
@@ -316,6 +316,8 @@ static int pcl726_attach(struct comedi_d
int ret;
int i;
+ if (it->options[1] < 0 || it->options[1] > 31)
+ return -EINVAL;
ret = comedi_request_region(dev, it->options[0], board->io_len);
if (ret)
return ret;
--
next prev parent reply other threads:[~2025-07-05 12:47 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-05 11:02 syzbot
2025-07-05 12:47 ` Hillf Danton [this message]
2025-07-05 13:06 ` syzbot
2025-07-06 1:51 ` Edward Adam Davis
2025-07-06 2:10 ` syzbot
2025-07-06 2:10 ` [PATCH] commdi: pcl726: Prevent invalid irq number Edward Adam Davis
2025-07-07 9:47 ` Ian Abbott
2025-07-07 10:01 ` Ian Abbott
2025-07-07 11:43 ` [PATCH V2] " Edward Adam Davis
2025-07-07 12:23 ` Ian Abbott
2025-07-07 12:39 ` [PATCH V3] comedi: " Edward Adam Davis
2025-07-24 11:07 ` [PATCH V3 REPOST] " Ian Abbott
2025-07-24 11:11 ` Ian Abbott
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