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([121.185.186.233]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a7193fb998sm111990855ad.69.2026.01.19.21.42.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Jan 2026 21:42:22 -0800 (PST) From: Jeongjun Park To: syzbot+64ca69977b37604cd6d9@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [input?] KASAN: stack-out-of-bounds Read in ft260_smbus_write Date: Tue, 20 Jan 2026 14:42:18 +0900 Message-Id: <20260120054218.213265-1-aha310510@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <696eedec.a00a0220.203946.0001.GAE@google.com> References: <696eedec.a00a0220.203946.0001.GAE@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit #syz test upstream master --- drivers/hid/hid-ft260.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/hid/hid-ft260.c b/drivers/hid/hid-ft260.c index 333341e80b0e..acfd69ed71a0 100644 --- a/drivers/hid/hid-ft260.c +++ b/drivers/hid/hid-ft260.c @@ -471,7 +471,8 @@ static int ft260_smbus_write(struct ft260_device *dev, u8 addr, u8 cmd, struct ft260_i2c_write_request_report *rep = (struct ft260_i2c_write_request_report *)dev->write_buf; - if (data_len >= sizeof(rep->data)) + if (data_len >= sizeof(rep->data) || + data_len >= sizeof(data)) return -EINVAL; rep->address = addr; --