From: syzbot <syzbot+7617e19c8a59edfbd879@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Forwarded: Re: [syzbot] [input?] KASAN: stack-out-of-bounds Read in cp2112_xfer
Date: Mon, 15 Sep 2025 12:14:06 -0700 [thread overview]
Message-ID: <68c8657e.050a0220.3c6139.0d1d.GAE@google.com> (raw)
In-Reply-To: <68c85874.050a0220.50883.0016.GAE@google.com>
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***
Subject: Re: [syzbot] [input?] KASAN: stack-out-of-bounds Read in cp2112_xfer
Author: deepak.takumi.120@gmail.com
#syz test
diff --git a/drivers/hid/hid-cp2112.c b/drivers/hid/hid-cp2112.c
index 482f62a78c41..8e17500256f1 100644
--- a/drivers/hid/hid-cp2112.c
+++ b/drivers/hid/hid-cp2112.c
@@ -689,7 +689,9 @@ static int cp2112_xfer(struct i2c_adapter *adap, u16 addr,
count = cp2112_write_read_req(buf, addr, read_length,
command, NULL, 0);
} else {
- count = cp2112_write_req(buf, addr, command,
+ if (data->block[0] > 32)
+ count = -EINVAL;
+ else count = cp2112_write_req(buf, addr, command,
data->block + 1,
data->block[0]);
}
@@ -700,7 +702,9 @@ static int cp2112_xfer(struct i2c_adapter *adap, u16 addr,
I2C_SMBUS_BLOCK_MAX,
command, NULL, 0);
} else {
- count = cp2112_write_req(buf, addr, command,
+ if (data->block[0] > 32)
+ count = -EINVAL;
+ else count = cp2112_write_req(buf, addr, command,
data->block,
data->block[0] + 1);
}
@@ -709,7 +713,9 @@ static int cp2112_xfer(struct i2c_adapter *adap, u16 addr,
size = I2C_SMBUS_BLOCK_DATA;
read_write = I2C_SMBUS_READ;
- count = cp2112_write_read_req(buf, addr, I2C_SMBUS_BLOCK_MAX,
+ if (data->block[0] > 32)
+ count = -EINVAL;
+ else count = cp2112_write_read_req(buf, addr,
I2C_SMBUS_BLOCK_MAX,
command, data->block,
data->block[0] + 1);
break;
next prev parent reply other threads:[~2025-09-15 19:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-15 18:18 [syzbot] [input?] KASAN: stack-out-of-bounds Read in cp2112_xfer syzbot
2025-09-15 19:14 ` syzbot [this message]
2025-09-15 19:34 ` Forwarded: " syzbot
2025-09-15 19:50 ` syzbot
2025-09-16 4:11 ` syzbot
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