From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1A91842DFEC; Tue, 21 Jul 2026 21:55:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784670937; cv=none; b=glHWGQfYPUtkxbSLrDtJS9vNDLFMW+FIbWsas8/Qt9pf1zgY6n1MIhzGt5o6nJfLqMgtJmpIOXOvqXXafBSVjhsYnoZI6uwnOFBDKcq2cjmSvOjXnMgiq38qFVOLDUYxUcim7wbFr56jWHqIMZDih0UGm6MM69sA59d61WwmbhY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784670937; c=relaxed/simple; bh=5zqurc/KrVySG5rthhjpjsTMt0bVxf5fUiz/j6sW9t8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ATdMJFyd3/HJ6LAb3888oBN4GTwMyV7VQXQUqPGT4raf2SS8wYFK2kGzub8HtUOtPSj4XZe/hPP2K+pkCVz4JuIM5zj+h87rOy6+d4yI6v839vDjELf5iC3zuZJvgjOWe3TrgIozxqUoD3DmSMOsR47TtD6DTbeDP1QQJoDWTac= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=mYN5y0UT; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="mYN5y0UT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 813411F000E9; Tue, 21 Jul 2026 21:55:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784670932; bh=zkdBqdFK+g1EaTG50Ty1lJt1QS3f2DK0eUgK7XbGusM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=mYN5y0UTZkhnqxC3z1FH2uUOmt5EWl++Emb3QBfzzqS3cfR1k5poWmzg2PZmL9O6a nTlgy3n8/ta+fNp6HdXwIfQcwbYTH7S+ODiH89X+MianlvbK1QX1MeBnWUvTbIJ60y KZ65vgtzJqKCvngyMBW0RAP4eEI+yhv+eT/H8jz4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stepan Ionichev , Andy Shevchenko , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 5.15 055/843] iio: gyro: bmg160: bail out when bandwidth/filter is not in table Date: Tue, 21 Jul 2026 17:14:50 +0200 Message-ID: <20260721152407.223414218@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152405.946368001@linuxfoundation.org> References: <20260721152405.946368001@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Stepan Ionichev commit 8320c77e67382d5d55d77043a5f60a867d408a2b upstream. 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. The set_filter() path is reachable from userspace via the sysfs in_anglvel_filter_low_pass_3db_frequency interface, so userspace can trivially trigger the out-of-bounds read with a value that is not in bmg160_samp_freq_table[].filter. Fixes: 22b46c45fb9b ("iio:gyro:bmg160 Gyro Sensor driver") Signed-off-by: Stepan Ionichev Reviewed-by: Andy Shevchenko Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/gyro/bmg160_core.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/iio/gyro/bmg160_core.c +++ b/drivers/iio/gyro/bmg160_core.c @@ -205,6 +205,9 @@ static int bmg160_get_filter(struct bmg1 break; } + if (i == ARRAY_SIZE(bmg160_samp_freq_table)) + return -EINVAL; + *val = bmg160_samp_freq_table[i].filter; return ret ? ret : IIO_VAL_INT; @@ -222,6 +225,9 @@ static int bmg160_set_filter(struct bmg1 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) {