From: Pavel Skripkin <paskripkin@gmail.com>
To: syzbot <syzbot+e417648b303855b91d8a@syzkaller.appspotmail.com>,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com, wsa@kernel.org
Subject: Re: [syzbot] WARNING in __i2c_transfer (2)
Date: Sat, 25 Dec 2021 15:39:27 +0300 [thread overview]
Message-ID: <0c5a424c-4089-9623-9276-9e9473191deb@gmail.com> (raw)
In-Reply-To: <000000000000b5e7f105d0d2d165@google.com>
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On 11/15/21 15:19, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: c8c109546a19 Merge tag 'zstd-for-linus-v5.16' of git://git..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=10a5bb32b00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=a262045c4c15a9e0
> dashboard link: https://syzkaller.appspot.com/bug?extid=e417648b303855b91d8a
> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> userspace arch: i386
>
> Unfortunately, I don't have any reproducer for this issue yet.
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+e417648b303855b91d8a@syzkaller.appspotmail.com
>
#syz test
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
With regards,
Pavel Skripkin
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diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index bce0e8bb7852..3b54efa4b1ec 100644
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -535,7 +535,7 @@ static long compat_i2cdev_ioctl(struct file *file, unsigned int cmd, unsigned lo
sizeof(rdwr_arg)))
return -EFAULT;
- if (rdwr_arg.nmsgs > I2C_RDWR_IOCTL_MAX_MSGS)
+ if (!rdwr_arg.nmsgs || rdwr_arg.nmsgs > I2C_RDWR_IOCTL_MAX_MSGS)
return -EINVAL;
rdwr_pa = kmalloc_array(rdwr_arg.nmsgs, sizeof(struct i2c_msg),
next prev parent reply other threads:[~2021-12-25 12:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-15 12:19 [syzbot] WARNING in __i2c_transfer (2) syzbot
2021-12-07 22:06 ` syzbot
2021-12-08 16:50 ` syzbot
2021-12-25 12:39 ` Pavel Skripkin [this message]
2021-12-25 12:50 ` syzbot
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