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https://github.com/Divested-Mobile/DivestOS-Build.git
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77 lines
2.6 KiB
Diff
77 lines
2.6 KiB
Diff
From f51a152ad52108457ae6b1caf7a04857f25c4bed Mon Sep 17 00:00:00 2001
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From: Skylar Chang <chiaweic@codeaurora.org>
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Date: Wed, 15 Mar 2017 21:27:35 -0700
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Subject: msm: ipa: fix security issues in ipa wan driver
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Fix the security issue in handling add mux channel event
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in ipa wan driver.
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Bug: 36490777
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Change-Id: Ic2ffeafddad4954ec3ecba0d675646d0790eede7
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Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>
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Acked-by: Shihuan Liu <shihuanl@qti.qualcomm.com>
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---
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drivers/platform/msm/ipa/rmnet_ipa.c | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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diff --git a/drivers/platform/msm/ipa/rmnet_ipa.c b/drivers/platform/msm/ipa/rmnet_ipa.c
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index a149a9e..0d6fb33 100644
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--- a/drivers/platform/msm/ipa/rmnet_ipa.c
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+++ b/drivers/platform/msm/ipa/rmnet_ipa.c
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@@ -57,6 +57,7 @@ static atomic_t is_initialized;
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static atomic_t is_ssr;
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u32 apps_to_ipa_hdl, ipa_to_apps_hdl; /* get handler from ipa */
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+static struct mutex add_mux_channel_lock;
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static int wwan_add_ul_flt_rule_to_ipa(void);
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static int wwan_del_ul_flt_rule_to_ipa(void);
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@@ -1242,9 +1243,11 @@ static int ipa_wwan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
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rmnet_mux_val.mux_id);
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return rc;
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}
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+ mutex_lock(&add_mux_channel_lock);
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if (rmnet_index >= MAX_NUM_OF_MUX_CHANNEL) {
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IPAWANERR("Exceed mux_channel limit(%d)\n",
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rmnet_index);
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+ mutex_unlock(&add_mux_channel_lock);
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return -EFAULT;
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}
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IPAWANDBG("ADD_MUX_CHANNEL(%d, name: %s)\n",
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@@ -1270,6 +1273,7 @@ static int ipa_wwan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
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IPAWANERR("device %s reg IPA failed\n",
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extend_ioctl_data.u.
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rmnet_mux_val.vchannel_name);
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+ mutex_unlock(&add_mux_channel_lock);
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return -ENODEV;
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}
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mux_channel[rmnet_index].mux_channel_set = true;
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@@ -1282,6 +1286,7 @@ static int ipa_wwan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
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mux_channel[rmnet_index].ul_flt_reg = false;
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}
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rmnet_index++;
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+ mutex_unlock(&add_mux_channel_lock);
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break;
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case RMNET_IOCTL_SET_EGRESS_DATA_FORMAT:
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IPAWANDBG("get RMNET_IOCTL_SET_EGRESS_DATA_FORMAT\n");
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@@ -2050,7 +2055,7 @@ static int __init ipa_wwan_init(void)
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atomic_set(&is_initialized, 0);
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atomic_set(&is_ssr, 0);
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-
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+ mutex_init(&add_mux_channel_lock);
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/* Register for Modem SSR */
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subsys = subsys_notif_register_notifier(SUBSYS_MODEM, &ssr_notifier);
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if (!IS_ERR(subsys))
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@@ -2061,6 +2066,7 @@ static int __init ipa_wwan_init(void)
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static void __exit ipa_wwan_cleanup(void)
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{
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+ mutex_destroy(&add_mux_channel_lock);
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platform_driver_unregister(&rmnet_ipa_driver);
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}
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--
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cgit v1.1
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