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Sun, 10 May 2026 02:50:28 -0700 (PDT) Received: from localhost.localdomain ([94.158.58.43]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48e6db1413csm39247795e9.29.2026.05.10.02.50.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 10 May 2026 02:50:27 -0700 (PDT) From: Stepan Ionichev To: jic23@kernel.org Cc: dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, gregkh@linuxfoundation.org, hcazarim@yahoo.com, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, sozdayvek@gmail.com Subject: [PATCH] iio: gyro: bmg160: bail out when bandwidth/filter is not in table Date: Sun, 10 May 2026 07:35:00 +0500 Message-Id: <20260510023500.61036-1-sozdayvek@gmail.com> X-Mailer: git-send-email 2.33.0.windows.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit bmg160_get_filter() walks bmg160_samp_freq_table[] looking for the entry matching the bw_bits value read from the chip: for (i = 0; i < ARRAY_SIZE(bmg160_samp_freq_table); ++i) { if (bmg160_samp_freq_table[i].bw_bits == bw_bits) break; } *val = bmg160_samp_freq_table[i].filter; If no entry matches, i ends up equal to the array size and the next line reads one slot past the end. bmg160_set_filter() has the same shape, driven by 'val' instead of bw_bits. smatch flags both: drivers/iio/gyro/bmg160_core.c:204 bmg160_get_filter() error: buffer overflow 'bmg160_samp_freq_table' 7 <= 7 drivers/iio/gyro/bmg160_core.c:222 bmg160_set_filter() error: buffer overflow 'bmg160_samp_freq_table' 7 <= 7 Return -EINVAL when no entry matches. Signed-off-by: Stepan Ionichev --- drivers/iio/gyro/bmg160_core.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/iio/gyro/bmg160_core.c b/drivers/iio/gyro/bmg160_core.c index 38394b5f3..58963f3ea 100644 --- a/drivers/iio/gyro/bmg160_core.c +++ b/drivers/iio/gyro/bmg160_core.c @@ -201,6 +201,9 @@ static int bmg160_get_filter(struct bmg160_data *data, int *val) break; } + if (i == ARRAY_SIZE(bmg160_samp_freq_table)) + return -EINVAL; + *val = bmg160_samp_freq_table[i].filter; return ret ? ret : IIO_VAL_INT; @@ -218,6 +221,9 @@ static int bmg160_set_filter(struct bmg160_data *data, int val) break; } + if (i == ARRAY_SIZE(bmg160_samp_freq_table)) + return -EINVAL; + ret = regmap_write(data->regmap, BMG160_REG_PMU_BW, bmg160_samp_freq_table[i].bw_bits); if (ret < 0) { -- 2.43.0