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https://github.com/Divested-Mobile/DivestOS-Build.git
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107 lines
3.6 KiB
Diff
107 lines
3.6 KiB
Diff
From 35346beb2d8882115f698ab22a96803552b5c57e Mon Sep 17 00:00:00 2001
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From: Siena Richard <sienar@codeaurora.org>
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Date: Tue, 4 Oct 2016 12:24:28 -0700
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Subject: drivers: soc: add size checks and update log messages
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Add size checks to validate minimum size is met. Update log messages
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to include only relevant information to ensure logs are accurate and
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useful.
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Change-Id: Idf76a7d964ec6989a0474d49895e54103f17938b
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CRs-fixed: 1073129
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Signed-off-by: Siena Richard <sienar@codeaurora.org>
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---
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drivers/soc/qcom/qdsp6v2/voice_svc.c | 41 ++++++++++++++++++++++++++----------
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1 file changed, 30 insertions(+), 11 deletions(-)
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diff --git a/drivers/soc/qcom/qdsp6v2/voice_svc.c b/drivers/soc/qcom/qdsp6v2/voice_svc.c
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index 67c58d1..50dd925 100644
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--- a/drivers/soc/qcom/qdsp6v2/voice_svc.c
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+++ b/drivers/soc/qcom/qdsp6v2/voice_svc.c
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@@ -223,8 +223,8 @@ static int voice_svc_send_req(struct voice_svc_cmd_request *apr_request,
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} else if (!strcmp(apr_request->svc_name, VOICE_SVC_MVM_STR)) {
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apr_handle = prtd->apr_q6_mvm;
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} else {
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- pr_err("%s: Invalid service %s\n", __func__,
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- apr_request->svc_name);
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+ pr_err("%s: Invalid service %.*s\n", __func__,
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+ MAX_APR_SERVICE_NAME_LEN, apr_request->svc_name);
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ret = -EINVAL;
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goto done;
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@@ -338,8 +338,8 @@ static int process_reg_cmd(struct voice_svc_register *apr_reg_svc,
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svc = VOICE_SVC_CVS_STR;
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handle = &prtd->apr_q6_cvs;
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} else {
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- pr_err("%s: Invalid Service: %s\n", __func__,
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- apr_reg_svc->svc_name);
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+ pr_err("%s: Invalid Service: %.*s\n", __func__,
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+ MAX_APR_SERVICE_NAME_LEN, apr_reg_svc->svc_name);
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ret = -EINVAL;
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goto done;
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}
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@@ -365,7 +365,17 @@ static ssize_t voice_svc_write(struct file *file, const char __user *buf,
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pr_debug("%s\n", __func__);
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- data = kmalloc(count, GFP_KERNEL);
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+ /*
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+ * Check if enough memory is allocated to parse the message type.
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+ * Will check there is enough to hold the payload later.
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+ */
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+ if (count >= sizeof(struct voice_svc_write_msg)) {
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+ data = kmalloc(count, GFP_KERNEL);
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+ } else {
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+ pr_debug("%s: invalid data size\n", __func__);
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+ ret = -EINVAL;
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+ goto done;
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+ }
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if (data == NULL) {
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pr_err("%s: data kmalloc failed.\n", __func__);
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@@ -383,7 +393,7 @@ static ssize_t voice_svc_write(struct file *file, const char __user *buf,
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}
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cmd = data->msg_type;
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- prtd = (struct voice_svc_prvt *)file->private_data;
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+ prtd = (struct voice_svc_prvt *) file->private_data;
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if (prtd == NULL) {
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pr_err("%s: prtd is NULL\n", __func__);
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@@ -393,9 +403,13 @@ static ssize_t voice_svc_write(struct file *file, const char __user *buf,
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switch (cmd) {
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case MSG_REGISTER:
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- if (count >=
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- (sizeof(struct voice_svc_register) +
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- sizeof(*data))) {
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+ /*
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+ * Check that count reflects the expected size to ensure
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+ * sufficient memory was allocated. Since voice_svc_register
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+ * has a static size, this should be exact.
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+ */
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+ if (count == (sizeof(struct voice_svc_write_msg) +
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+ sizeof(struct voice_svc_register))) {
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ret = process_reg_cmd(
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(struct voice_svc_register *)data->payload, prtd);
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if (!ret)
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@@ -407,8 +421,13 @@ static ssize_t voice_svc_write(struct file *file, const char __user *buf,
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}
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break;
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case MSG_REQUEST:
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- if (count >= (sizeof(struct voice_svc_cmd_request) +
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- sizeof(*data))) {
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+ /*
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+ * Check that count reflects the expected size to ensure
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+ * sufficient memory was allocated. Since voice_svc_cmd_request
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+ * has a variable size, check the minimum value count must be.
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+ */
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+ if (count >= (sizeof(struct voice_svc_write_msg) +
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+ sizeof(struct voice_svc_cmd_request))) {
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ret = voice_svc_send_req(
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(struct voice_svc_cmd_request *)data->payload, prtd);
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if (!ret)
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--
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cgit v1.1
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