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DivestOS/Patches/Linux_CVEs/CVE-2017-8237/ANY/0001.patch
Tad 11c7037780 Switch to new CVE patchset
2017-11-07 17:32:46 -05:00

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From 342d16ac6fb01e304ec75344c693257e00628ecf Mon Sep 17 00:00:00 2001
From: Ghanim Fodi <gfodi@codeaurora.org>
Date: Tue, 24 Jan 2017 15:42:30 +0200
Subject: msm: ipa3: Validate IPA and GSI firmwares before loading
IPA and GSI firmwares are saved on the file-system as an
ELF file. IPA driver extracts the firmwares and load
them during driver initialization.
This change adds validation steps to each firmware before
loading: load addresses, memory sizes, firmware sizes and
more...
Change-Id: I7d7f66e8e8a9ca0efae08b1e57b25ae4e44cc5bb
CRs-fixed: 1110522
Signed-off-by: Ghanim Fodi <gfodi@codeaurora.org>
---
drivers/platform/msm/gsi/gsi.c | 10 ++
drivers/platform/msm/gsi/gsi_reg.h | 4 +-
drivers/platform/msm/ipa/ipa_v3/ipa.c | 2 +-
drivers/platform/msm/ipa/ipa_v3/ipa_i.h | 2 +-
drivers/platform/msm/ipa/ipa_v3/ipa_utils.c | 187 +++++++++++++++------
drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal.c | 18 +-
drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal.h | 12 +-
drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_i.h | 6 +-
.../platform/msm/ipa/ipa_v3/ipahal/ipahal_reg.c | 6 +
.../platform/msm/ipa/ipa_v3/ipahal/ipahal_reg.h | 4 +-
include/linux/msm_gsi.h | 21 ++-
11 files changed, 215 insertions(+), 57 deletions(-)
diff --git a/drivers/platform/msm/gsi/gsi.c b/drivers/platform/msm/gsi/gsi.c
index 24fdd61..a30d806 100644
--- a/drivers/platform/msm/gsi/gsi.c
+++ b/drivers/platform/msm/gsi/gsi.c
@@ -2742,6 +2742,16 @@ int gsi_enable_fw(phys_addr_t gsi_base_addr, u32 gsi_size, enum gsi_ver ver)
}
EXPORT_SYMBOL(gsi_enable_fw);
+void gsi_get_inst_ram_offset_and_size(unsigned long *base_offset,
+ unsigned long *size)
+{
+ if (base_offset)
+ *base_offset = GSI_GSI_INST_RAM_BASE_OFFS;
+ if (size)
+ *size = GSI_GSI_INST_RAM_SIZE;
+}
+EXPORT_SYMBOL(gsi_get_inst_ram_offset_and_size);
+
static int msm_gsi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
diff --git a/drivers/platform/msm/gsi/gsi_reg.h b/drivers/platform/msm/gsi/gsi_reg.h
index fa1e848..1acaf74 100644
--- a/drivers/platform/msm/gsi/gsi_reg.h
+++ b/drivers/platform/msm/gsi/gsi_reg.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -1838,5 +1838,7 @@
#define GSI_INTER_EE_n_SRC_EV_CH_IRQ_CLR_EV_CH_BIT_MAP_BMSK 0xffffffff
#define GSI_INTER_EE_n_SRC_EV_CH_IRQ_CLR_EV_CH_BIT_MAP_SHFT 0x0
+#define GSI_GSI_INST_RAM_BASE_OFFS 0x4000
+#define GSI_GSI_INST_RAM_SIZE 0x4000
#endif /* __GSI_REG_H__ */
diff --git a/drivers/platform/msm/ipa/ipa_v3/ipa.c b/drivers/platform/msm/ipa/ipa_v3/ipa.c
index aa83cbd..82887d05 100644
--- a/drivers/platform/msm/ipa/ipa_v3/ipa.c
+++ b/drivers/platform/msm/ipa/ipa_v3/ipa.c
@@ -4187,7 +4187,7 @@ static int ipa3_trigger_fw_loading_mdms(void)
IPADBG("FWs are available for loading\n");
- result = ipa3_load_fws(fw);
+ result = ipa3_load_fws(fw, ipa3_res.transport_mem_base);
if (result) {
IPAERR("IPA FWs loading has failed\n");
release_firmware(fw);
diff --git a/drivers/platform/msm/ipa/ipa_v3/ipa_i.h b/drivers/platform/msm/ipa/ipa_v3/ipa_i.h
index 3f19c21..fa6dd64 100644
--- a/drivers/platform/msm/ipa/ipa_v3/ipa_i.h
+++ b/drivers/platform/msm/ipa/ipa_v3/ipa_i.h
@@ -2015,7 +2015,7 @@ int ipa3_uc_panic_notifier(struct notifier_block *this,
unsigned long event, void *ptr);
void ipa3_inc_acquire_wakelock(void);
void ipa3_dec_release_wakelock(void);
-int ipa3_load_fws(const struct firmware *firmware);
+int ipa3_load_fws(const struct firmware *firmware, phys_addr_t gsi_mem_base);
int ipa3_register_ipa_ready_cb(void (*ipa_ready_cb)(void *), void *user_data);
const char *ipa_hw_error_str(enum ipa3_hw_errors err_type);
int ipa_gsi_ch20_wa(void);
diff --git a/drivers/platform/msm/ipa/ipa_v3/ipa_utils.c b/drivers/platform/msm/ipa/ipa_v3/ipa_utils.c
index 7b7ae75..ba255a2 100644
--- a/drivers/platform/msm/ipa/ipa_v3/ipa_utils.c
+++ b/drivers/platform/msm/ipa/ipa_v3/ipa_utils.c
@@ -6107,75 +6107,164 @@ int ipa3_generate_eq_from_hw_rule(
return 0;
}
+static int ipa3_load_single_fw(const struct firmware *firmware,
+ const struct elf32_phdr *phdr)
+{
+ uint32_t *fw_mem_base;
+ int index;
+ const uint32_t *elf_data_ptr;
+
+ if (phdr->p_offset > firmware->size) {
+ IPAERR("Invalid ELF: offset=%u is beyond elf_size=%zu\n",
+ phdr->p_offset, firmware->size);
+ return -EINVAL;
+ }
+ if ((firmware->size - phdr->p_offset) < phdr->p_filesz) {
+ IPAERR("Invalid ELF: offset=%u filesz=%u elf_size=%zu\n",
+ phdr->p_offset, phdr->p_filesz, firmware->size);
+ return -EINVAL;
+ }
+
+ if (phdr->p_memsz % sizeof(uint32_t)) {
+ IPAERR("FW mem size %u doesn't align to 32bit\n",
+ phdr->p_memsz);
+ return -EFAULT;
+ }
+
+ if (phdr->p_filesz > phdr->p_memsz) {
+ IPAERR("FW image too big src_size=%u dst_size=%u\n",
+ phdr->p_filesz, phdr->p_memsz);
+ return -EFAULT;
+ }
+
+ fw_mem_base = ioremap(phdr->p_vaddr, phdr->p_memsz);
+ if (!fw_mem_base) {
+ IPAERR("Failed to map 0x%x for the size of %u\n",
+ phdr->p_vaddr, phdr->p_memsz);
+ return -ENOMEM;
+ }
+
+ /* Set the entire region to 0s */
+ memset(fw_mem_base, 0, phdr->p_memsz);
+
+ elf_data_ptr = (uint32_t *)(firmware->data + phdr->p_offset);
+
+ /* Write the FW */
+ for (index = 0; index < phdr->p_filesz/sizeof(uint32_t); index++) {
+ writel_relaxed(*elf_data_ptr, &fw_mem_base[index]);
+ elf_data_ptr++;
+ }
+
+ iounmap(fw_mem_base);
+
+ return 0;
+}
+
/**
* ipa3_load_fws() - Load the IPAv3 FWs into IPA&GSI SRAM.
*
* @firmware: Structure which contains the FW data from the user space.
+ * @gsi_mem_base: GSI base address
*
* Return value: 0 on success, negative otherwise
*
*/
-int ipa3_load_fws(const struct firmware *firmware)
+int ipa3_load_fws(const struct firmware *firmware, phys_addr_t gsi_mem_base)
{
const struct elf32_hdr *ehdr;
const struct elf32_phdr *phdr;
- const uint8_t *elf_phdr_ptr;
- uint32_t *elf_data_ptr;
- int phdr_idx, index;
- uint32_t *fw_mem_base;
-
- ehdr = (struct elf32_hdr *) firmware->data;
-
- elf_phdr_ptr = firmware->data + sizeof(*ehdr);
+ unsigned long gsi_iram_ofst;
+ unsigned long gsi_iram_size;
+ phys_addr_t ipa_reg_mem_base;
+ u32 ipa_reg_ofst;
+ int rc;
+
+ if (!gsi_mem_base) {
+ IPAERR("Invalid GSI base address\n");
+ return -EINVAL;
+ }
- for (phdr_idx = 0; phdr_idx < ehdr->e_phnum; phdr_idx++) {
- /*
- * The ELF program header will contain the starting
- * address to which the firmware needs to copied.
- */
- phdr = (struct elf32_phdr *)elf_phdr_ptr;
+ ipa_assert_on(!firmware);
+ /* One program header per FW image: GSI, DPS and HPS */
+ if (firmware->size < (sizeof(*ehdr) + 3 * sizeof(*phdr))) {
+ IPAERR("Missing ELF and Program headers firmware size=%zu\n",
+ firmware->size);
+ return -EINVAL;
+ }
- /*
- * p_vaddr will contain the starting address to which the
- * FW needs to be loaded.
- * p_memsz will contain the size of the IRAM.
- * p_filesz will contain the size of the FW image.
- */
- fw_mem_base = ioremap(phdr->p_vaddr, phdr->p_memsz);
- if (!fw_mem_base) {
- IPAERR("Failed to map 0x%x for the size of %u\n",
- phdr->p_vaddr, phdr->p_memsz);
- return -ENOMEM;
- }
+ ehdr = (struct elf32_hdr *) firmware->data;
+ ipa_assert_on(!ehdr);
+ if (ehdr->e_phnum != 3) {
+ IPAERR("Unexpected number of ELF program headers\n");
+ return -EINVAL;
+ }
+ phdr = (struct elf32_phdr *)(firmware->data + sizeof(*ehdr));
- /* Set the entire region to 0s */
- memset(fw_mem_base, 0, phdr->p_memsz);
+ /*
+ * Each ELF program header represents a FW image and contains:
+ * p_vaddr : The starting address to which the FW needs to loaded.
+ * p_memsz : The size of the IRAM (where the image loaded)
+ * p_filesz: The size of the FW image embedded inside the ELF
+ * p_offset: Absolute offset to the image from the head of the ELF
+ */
- /*
- * p_offset will contain and absolute offset from the beginning
- * of the ELF file.
- */
- elf_data_ptr = (uint32_t *)
- ((uint8_t *)firmware->data + phdr->p_offset);
+ /* Load GSI FW image */
+ gsi_get_inst_ram_offset_and_size(&gsi_iram_ofst, &gsi_iram_size);
+ if (phdr->p_vaddr != (gsi_mem_base + gsi_iram_ofst)) {
+ IPAERR(
+ "Invalid GSI FW img load addr vaddr=0x%x gsi_mem_base=%pa gsi_iram_ofst=0x%lx\n"
+ , phdr->p_vaddr, &gsi_mem_base, gsi_iram_ofst);
+ return -EINVAL;
+ }
+ if (phdr->p_memsz > gsi_iram_size) {
+ IPAERR("Invalid GSI FW img size memsz=%d gsi_iram_size=%lu\n",
+ phdr->p_memsz, gsi_iram_size);
+ return -EINVAL;
+ }
+ rc = ipa3_load_single_fw(firmware, phdr);
+ if (rc)
+ return rc;
- if (phdr->p_memsz % sizeof(uint32_t)) {
- IPAERR("FW size %u doesn't align to 32bit\n",
- phdr->p_memsz);
- return -EFAULT;
- }
+ phdr++;
+ ipa_reg_mem_base = ipa3_ctx->ipa_wrapper_base + ipahal_get_reg_base();
- /* Write the FW */
- for (index = 0; index < phdr->p_filesz/sizeof(uint32_t);
- index++) {
- writel_relaxed(*elf_data_ptr, &fw_mem_base[index]);
- elf_data_ptr++;
- }
+ /* Load IPA DPS FW image */
+ ipa_reg_ofst = ipahal_get_reg_ofst(IPA_DPS_SEQUENCER_FIRST);
+ if (phdr->p_vaddr != (ipa_reg_mem_base + ipa_reg_ofst)) {
+ IPAERR(
+ "Invalid IPA DPS img load addr vaddr=0x%x ipa_reg_mem_base=%pa ipa_reg_ofst=%u\n"
+ , phdr->p_vaddr, &ipa_reg_mem_base, ipa_reg_ofst);
+ return -EINVAL;
+ }
+ if (phdr->p_memsz > ipahal_get_dps_img_mem_size()) {
+ IPAERR("Invalid IPA DPS img size memsz=%d dps_mem_size=%u\n",
+ phdr->p_memsz, ipahal_get_dps_img_mem_size());
+ return -EINVAL;
+ }
+ rc = ipa3_load_single_fw(firmware, phdr);
+ if (rc)
+ return rc;
- iounmap(fw_mem_base);
+ phdr++;
- elf_phdr_ptr = elf_phdr_ptr + sizeof(*phdr);
+ /* Load IPA HPS FW image */
+ ipa_reg_ofst = ipahal_get_reg_ofst(IPA_HPS_SEQUENCER_FIRST);
+ if (phdr->p_vaddr != (ipa_reg_mem_base + ipa_reg_ofst)) {
+ IPAERR(
+ "Invalid IPA HPS img load addr vaddr=0x%x ipa_reg_mem_base=%pa ipa_reg_ofst=%u\n"
+ , phdr->p_vaddr, &ipa_reg_mem_base, ipa_reg_ofst);
+ return -EINVAL;
+ }
+ if (phdr->p_memsz > ipahal_get_hps_img_mem_size()) {
+ IPAERR("Invalid IPA HPS img size memsz=%d dps_mem_size=%u\n",
+ phdr->p_memsz, ipahal_get_hps_img_mem_size());
+ return -EINVAL;
}
- IPADBG("IPA FWs (GSI FW, HPS and DPS) were loaded\n");
+ rc = ipa3_load_single_fw(firmware, phdr);
+ if (rc)
+ return rc;
+
+ IPADBG("IPA FWs (GSI FW, DPS and HPS) loaded successfully\n");
return 0;
}
diff --git a/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal.c b/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal.c
index d023522..95a97ed 100644
--- a/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal.c
+++ b/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2016, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -1253,6 +1253,22 @@ int ipahal_get_proc_ctx_needed_len(enum ipa_hdr_proc_type type)
return res;
}
+/*
+ * Get IPA Data Processing Star image memory size at IPA SRAM
+ */
+u32 ipahal_get_dps_img_mem_size(void)
+{
+ return IPA_HW_DPS_IMG_MEM_SIZE_V3_0;
+}
+
+/*
+ * Get IPA Header Processing Star image memory size at IPA SRAM
+ */
+u32 ipahal_get_hps_img_mem_size(void)
+{
+ return IPA_HW_HPS_IMG_MEM_SIZE_V3_0;
+}
+
int ipahal_init(enum ipa_hw_type ipa_hw_type, void __iomem *base)
{
int result;
diff --git a/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal.h b/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal.h
index 00b2058..746bc30 100644
--- a/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal.h
+++ b/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2016, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -634,6 +634,16 @@ void ipahal_cp_proc_ctx_to_hw_buff(enum ipa_hdr_proc_type type,
*/
int ipahal_get_proc_ctx_needed_len(enum ipa_hdr_proc_type type);
+/*
+ * Get IPA Data Processing Star image memory size at IPA SRAM
+ */
+u32 ipahal_get_dps_img_mem_size(void);
+
+/*
+ * Get IPA Header Processing Star image memory size at IPA SRAM
+ */
+u32 ipahal_get_hps_img_mem_size(void);
+
int ipahal_init(enum ipa_hw_type ipa_hw_type, void __iomem *base);
void ipahal_destroy(void);
diff --git a/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_i.h b/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_i.h
index 6a22240..5f02b4df 100644
--- a/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_i.h
+++ b/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_i.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2016, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -542,4 +542,8 @@ struct ipa_hw_hdr_proc_ctx_add_hdr_cmd_seq {
struct ipa_hw_hdr_proc_ctx_tlv end;
};
+/* IPA HW DPS/HPS image memory sizes */
+#define IPA_HW_DPS_IMG_MEM_SIZE_V3_0 128
+#define IPA_HW_HPS_IMG_MEM_SIZE_V3_0 320
+
#endif /* _IPAHAL_I_H_ */
diff --git a/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_reg.c b/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_reg.c
index 6b606ab..6a70fc0 100644
--- a/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_reg.c
+++ b/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_reg.c
@@ -1157,6 +1157,12 @@ static struct ipahal_reg_obj ipahal_reg_objs[IPA_HW_MAX][IPA_REG_MAX] = {
[IPA_HW_v3_0][IPA_QSB_MAX_READS] = {
ipareg_construct_qsb_max_reads, ipareg_parse_dummy,
0x00000078, 0},
+ [IPA_HW_v3_0][IPA_DPS_SEQUENCER_FIRST] = {
+ ipareg_construct_dummy, ipareg_parse_dummy,
+ 0x0001e000, 0},
+ [IPA_HW_v3_0][IPA_HPS_SEQUENCER_FIRST] = {
+ ipareg_construct_dummy, ipareg_parse_dummy,
+ 0x0001e080, 0},
/* IPAv3.1 */
diff --git a/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_reg.h b/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_reg.h
index 98894c3..6ca16bf 100644
--- a/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_reg.h
+++ b/drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_reg.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2012-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -84,6 +84,8 @@ enum ipahal_reg_name {
IPA_QSB_MAX_READS,
IPA_TX_CFG,
IPA_IDLE_INDICATION_CFG,
+ IPA_DPS_SEQUENCER_FIRST,
+ IPA_HPS_SEQUENCER_FIRST,
IPA_REG_MAX,
};
diff --git a/include/linux/msm_gsi.h b/include/linux/msm_gsi.h
index 4825fc7..18d4e72 100644
--- a/include/linux/msm_gsi.h
+++ b/include/linux/msm_gsi.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -1041,6 +1041,19 @@ int gsi_configure_regs(phys_addr_t gsi_base_addr, u32 gsi_size,
*/
int gsi_enable_fw(phys_addr_t gsi_base_addr, u32 gsi_size, enum gsi_ver ver);
+/**
+ * gsi_get_inst_ram_offset_and_size - Peripheral should call this function
+ * to get instruction RAM base address offset and size. Peripheral typically
+ * uses this info to load GSI FW into the IRAM.
+ *
+ * @base_offset:[OUT] - IRAM base offset address
+ * @size: [OUT] - IRAM size
+
+ * @Return none
+ */
+void gsi_get_inst_ram_offset_and_size(unsigned long *base_offset,
+ unsigned long *size);
+
/*
* Here is a typical sequence of calls
*
@@ -1228,9 +1241,15 @@ static inline int gsi_configure_regs(phys_addr_t gsi_base_addr, u32 gsi_size,
{
return -GSI_STATUS_UNSUPPORTED_OP;
}
+
static inline int gsi_enable_fw(phys_addr_t gsi_base_addr, u32 gsi_size)
{
return -GSI_STATUS_UNSUPPORTED_OP;
}
+
+static inline void gsi_get_inst_ram_offset_and_size(unsigned long *base_offset,
+ unsigned long *size)
+{
+}
#endif
#endif
--
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