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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen staging] xen/misc: CFI hardening
commit 66342fb5de2ffa7f26d5cabb4f7524bdb72be8b7
Author: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Oct 29 14:02:13 2021 +0100
Commit: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed Feb 23 15:33:43 2022 +0000
xen/misc: CFI hardening
Control Flow Integrity schemes use toolchain and optionally hardware support
to help protect against call/jump/return oriented programming attacks.
Use cf_check to annotate function pointer targets for the toolchain.
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
xen/arch/x86/mm.c | 6 ++++--
xen/arch/x86/setup.c | 4 ++--
xen/common/coverage/gcov.c | 8 ++++----
xen/common/coverage/llvm.c | 7 ++++---
xen/common/domain.c | 2 +-
xen/common/gdbstub.c | 5 ++---
xen/common/livepatch.c | 7 +++----
xen/common/memory.c | 4 ++--
xen/common/page_alloc.c | 2 +-
xen/common/radix-tree.c | 4 ++--
xen/common/rangeset.c | 2 +-
xen/common/spinlock.c | 6 +++---
xen/common/vm_event.c | 6 +++---
xen/common/xmalloc_tlsf.c | 4 ++--
xen/drivers/passthrough/amd/iommu_init.c | 2 +-
xen/include/xen/domain.h | 2 +-
16 files changed, 36 insertions(+), 35 deletions(-)
diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index a1b8737096..0665095d23 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -835,7 +835,8 @@ struct mmio_emul_range_ctxt {
unsigned long mfn;
};
-static int print_mmio_emul_range(unsigned long s, unsigned long e, void *arg)
+static int cf_check print_mmio_emul_range(
+ unsigned long s, unsigned long e, void *arg)
{
const struct mmio_emul_range_ctxt *ctxt = arg;
@@ -4606,7 +4607,8 @@ static int _handle_iomem_range(unsigned long s, unsigned
long e,
return 0;
}
-static int handle_iomem_range(unsigned long s, unsigned long e, void *p)
+static int cf_check handle_iomem_range(
+ unsigned long s, unsigned long e, void *p)
{
int err = 0;
diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c
index 3a4ec1fcfd..a9a371336b 100644
--- a/xen/arch/x86/setup.c
+++ b/xen/arch/x86/setup.c
@@ -2021,8 +2021,8 @@ int __hwdom_init xen_in_range(unsigned long mfn)
return 0;
}
-static int __hwdom_init io_bitmap_cb(unsigned long s, unsigned long e,
- void *ctx)
+static int __hwdom_init cf_check io_bitmap_cb(
+ unsigned long s, unsigned long e, void *ctx)
{
struct domain *d = ctx;
unsigned int i;
diff --git a/xen/common/coverage/gcov.c b/xen/common/coverage/gcov.c
index 3cc98728bf..327bf8d646 100644
--- a/xen/common/coverage/gcov.c
+++ b/xen/common/coverage/gcov.c
@@ -120,7 +120,7 @@ static int gcov_info_dump_payload(const struct gcov_info
*info,
}
-static uint32_t gcov_get_size(void)
+static uint32_t cf_check gcov_get_size(void)
{
uint32_t total_size = sizeof(uint32_t); /* Magic number XCOV */
struct gcov_info *info = NULL;
@@ -140,7 +140,7 @@ static uint32_t gcov_get_size(void)
return total_size;
}
-static void gcov_reset_all_counters(void)
+static void cf_check gcov_reset_all_counters(void)
{
struct gcov_info *info = NULL;
@@ -172,8 +172,8 @@ static int gcov_dump_one_record(const struct gcov_info
*info,
return gcov_info_dump_payload(info, buffer, off);
}
-static int gcov_dump_all(XEN_GUEST_HANDLE_PARAM(char) buffer,
- uint32_t *buffer_size)
+static int cf_check gcov_dump_all(
+ XEN_GUEST_HANDLE_PARAM(char) buffer, uint32_t *buffer_size)
{
uint32_t off;
uint32_t magic = XEN_GCOV_FORMAT_MAGIC;
diff --git a/xen/common/coverage/llvm.c b/xen/common/coverage/llvm.c
index 766c07fd5d..50d7a3c5d3 100644
--- a/xen/common/coverage/llvm.c
+++ b/xen/common/coverage/llvm.c
@@ -94,18 +94,19 @@ extern uint64_t __stop___llvm_prf_cnts[];
#define START_COUNTERS ((void *)__start___llvm_prf_cnts)
#define END_COUNTERS ((void *)__stop___llvm_prf_cnts)
-static void reset_counters(void)
+static void cf_check reset_counters(void)
{
memset(START_COUNTERS, 0, END_COUNTERS - START_COUNTERS);
}
-static uint32_t get_size(void)
+static uint32_t cf_check get_size(void)
{
return ROUNDUP(sizeof(struct llvm_profile_header) + END_DATA - START_DATA +
END_COUNTERS - START_COUNTERS + END_NAMES - START_NAMES, 8);
}
-static int dump(XEN_GUEST_HANDLE_PARAM(char) buffer, uint32_t *buf_size)
+static int cf_check dump(
+ XEN_GUEST_HANDLE_PARAM(char) buffer, uint32_t *buf_size)
{
struct llvm_profile_header header = {
.magic = LLVM_PROFILE_MAGIC,
diff --git a/xen/common/domain.c b/xen/common/domain.c
index f3d06df76c..351029f8b2 100644
--- a/xen/common/domain.c
+++ b/xen/common/domain.c
@@ -1803,7 +1803,7 @@ static void cf_check _free_pirq_struct(struct rcu_head
*head)
xfree(container_of(head, struct pirq, rcu_head));
}
-void free_pirq_struct(void *ptr)
+void cf_check free_pirq_struct(void *ptr)
{
struct pirq *pirq = ptr;
diff --git a/xen/common/gdbstub.c b/xen/common/gdbstub.c
index 079c3ca961..d6872721dc 100644
--- a/xen/common/gdbstub.c
+++ b/xen/common/gdbstub.c
@@ -69,7 +69,7 @@ static void gdb_smp_resume(void);
static char __initdata opt_gdb[30];
string_param("gdb", opt_gdb);
-static void gdbstub_console_puts(const char *str, size_t nr);
+static void cf_check gdbstub_console_puts(const char *str, size_t nr);
/* value <-> char (de)serialzers */
static char
@@ -546,8 +546,7 @@ __gdb_ctx = {
};
static struct gdb_context *gdb_ctx = &__gdb_ctx;
-static void
-gdbstub_console_puts(const char *str, size_t nr)
+static void cf_check gdbstub_console_puts(const char *str, size_t nr)
{
const char *p;
diff --git a/xen/common/livepatch.c b/xen/common/livepatch.c
index e8714920dc..ec301a9f12 100644
--- a/xen/common/livepatch.c
+++ b/xen/common/livepatch.c
@@ -157,10 +157,9 @@ unsigned long livepatch_symbols_lookup_by_name(const char
*symname)
return 0;
}
-static const char *livepatch_symbols_lookup(unsigned long addr,
- unsigned long *symbolsize,
- unsigned long *offset,
- char *namebuf)
+static const char *cf_check livepatch_symbols_lookup(
+ unsigned long addr, unsigned long *symbolsize, unsigned long *offset,
+ char *namebuf)
{
const struct payload *data;
unsigned int i, best;
diff --git a/xen/common/memory.c b/xen/common/memory.c
index ede45c4af9..69b0cd1e50 100644
--- a/xen/common/memory.c
+++ b/xen/common/memory.c
@@ -1051,8 +1051,8 @@ struct get_reserved_device_memory {
unsigned int used_entries;
};
-static int get_reserved_device_memory(xen_pfn_t start, xen_ulong_t nr,
- u32 id, void *ctxt)
+static int cf_check get_reserved_device_memory(
+ xen_pfn_t start, xen_ulong_t nr, u32 id, void *ctxt)
{
struct get_reserved_device_memory *grdm = ctxt;
uint32_t sbdf = PCI_SBDF3(grdm->map.dev.pci.seg, grdm->map.dev.pci.bus,
diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c
index 3caf5c954b..4635718237 100644
--- a/xen/common/page_alloc.c
+++ b/xen/common/page_alloc.c
@@ -1238,7 +1238,7 @@ struct scrub_wait_state {
bool drop;
};
-static void scrub_continue(void *data)
+static void cf_check scrub_continue(void *data)
{
struct scrub_wait_state *st = data;
diff --git a/xen/common/radix-tree.c b/xen/common/radix-tree.c
index 33b47748ae..adc3034222 100644
--- a/xen/common/radix-tree.c
+++ b/xen/common/radix-tree.c
@@ -52,7 +52,7 @@ struct rcu_node {
struct rcu_head rcu_head;
};
-static struct radix_tree_node *rcu_node_alloc(void *arg)
+static struct radix_tree_node *cf_check rcu_node_alloc(void *arg)
{
struct rcu_node *rcu_node = xmalloc(struct rcu_node);
return rcu_node ? &rcu_node->node : NULL;
@@ -65,7 +65,7 @@ static void cf_check _rcu_node_free(struct rcu_head *head)
xfree(rcu_node);
}
-static void rcu_node_free(struct radix_tree_node *node, void *arg)
+static void cf_check rcu_node_free(struct radix_tree_node *node, void *arg)
{
struct rcu_node *rcu_node = container_of(node, struct rcu_node, node);
call_rcu(&rcu_node->rcu_head, _rcu_node_free);
diff --git a/xen/common/rangeset.c b/xen/common/rangeset.c
index 885b6b15c2..a6ef264046 100644
--- a/xen/common/rangeset.c
+++ b/xen/common/rangeset.c
@@ -384,7 +384,7 @@ int rangeset_consume_ranges(struct rangeset *r,
return rc;
}
-static int merge(unsigned long s, unsigned long e, void *data)
+static int cf_check merge(unsigned long s, unsigned long e, void *data)
{
struct rangeset *r = data;
diff --git a/xen/common/spinlock.c b/xen/common/spinlock.c
index 25bfbf3c47..62c83aaa6a 100644
--- a/xen/common/spinlock.c
+++ b/xen/common/spinlock.c
@@ -375,7 +375,7 @@ static void spinlock_profile_iterate(lock_profile_subfunc
*sub, void *par)
spin_unlock(&lock_profile_lock);
}
-static void spinlock_profile_print_elem(struct lock_profile *data,
+static void cf_check spinlock_profile_print_elem(struct lock_profile *data,
int32_t type, int32_t idx, void *par)
{
struct spinlock *lock = data->lock;
@@ -404,7 +404,7 @@ void cf_check spinlock_profile_printall(unsigned char key)
spinlock_profile_iterate(spinlock_profile_print_elem, NULL);
}
-static void spinlock_profile_reset_elem(struct lock_profile *data,
+static void cf_check spinlock_profile_reset_elem(struct lock_profile *data,
int32_t type, int32_t idx, void *par)
{
data->lock_cnt = 0;
@@ -428,7 +428,7 @@ typedef struct {
int rc;
} spinlock_profile_ucopy_t;
-static void spinlock_profile_ucopy_elem(struct lock_profile *data,
+static void cf_check spinlock_profile_ucopy_elem(struct lock_profile *data,
int32_t type, int32_t idx, void *par)
{
spinlock_profile_ucopy_t *p = par;
diff --git a/xen/common/vm_event.c b/xen/common/vm_event.c
index 70ab3ba406..84cf52636b 100644
--- a/xen/common/vm_event.c
+++ b/xen/common/vm_event.c
@@ -523,21 +523,21 @@ int __vm_event_claim_slot(struct domain *d, struct
vm_event_domain *ved,
#ifdef CONFIG_MEM_PAGING
/* Registered with Xen-bound event channel for incoming notifications. */
-static void mem_paging_notification(struct vcpu *v, unsigned int port)
+static void cf_check mem_paging_notification(struct vcpu *v, unsigned int port)
{
vm_event_resume(v->domain, v->domain->vm_event_paging);
}
#endif
/* Registered with Xen-bound event channel for incoming notifications. */
-static void monitor_notification(struct vcpu *v, unsigned int port)
+static void cf_check monitor_notification(struct vcpu *v, unsigned int port)
{
vm_event_resume(v->domain, v->domain->vm_event_monitor);
}
#ifdef CONFIG_MEM_SHARING
/* Registered with Xen-bound event channel for incoming notifications. */
-static void mem_sharing_notification(struct vcpu *v, unsigned int port)
+static void cf_check mem_sharing_notification(struct vcpu *v, unsigned int
port)
{
vm_event_resume(v->domain, v->domain->vm_event_share);
}
diff --git a/xen/common/xmalloc_tlsf.c b/xen/common/xmalloc_tlsf.c
index e3f6886e6b..d2ad909502 100644
--- a/xen/common/xmalloc_tlsf.c
+++ b/xen/common/xmalloc_tlsf.c
@@ -512,13 +512,13 @@ int xmem_pool_maxalloc(struct xmem_pool *pool)
static struct xmem_pool *xenpool;
-static void *xmalloc_pool_get(unsigned long size)
+static void *cf_check xmalloc_pool_get(unsigned long size)
{
ASSERT(size == PAGE_SIZE);
return alloc_xenheap_page();
}
-static void xmalloc_pool_put(void *p)
+static void cf_check xmalloc_pool_put(void *p)
{
free_xenheap_page(p);
}
diff --git a/xen/drivers/passthrough/amd/iommu_init.c
b/xen/drivers/passthrough/amd/iommu_init.c
index 06b4d2b1fe..cebcd68a6c 100644
--- a/xen/drivers/passthrough/amd/iommu_init.c
+++ b/xen/drivers/passthrough/amd/iommu_init.c
@@ -1073,7 +1073,7 @@ static void * __init allocate_ppr_log(struct amd_iommu
*iommu)
#define IVRS_MAPPINGS_DEVTAB(m) (m)[ivrs_bdf_entries].intremap_table
/* Gets passed to radix_tree_destroy(), so its param needs to be void *. */
-static void __init free_ivrs_mapping_callback(void *ptr)
+static void __init cf_check free_ivrs_mapping_callback(void *ptr)
{
const struct ivrs_mappings *ivrs_mappings = ptr;
diff --git a/xen/include/xen/domain.h b/xen/include/xen/domain.h
index 24eb4cc7d3..1c3c88a14d 100644
--- a/xen/include/xen/domain.h
+++ b/xen/include/xen/domain.h
@@ -52,7 +52,7 @@ void free_vcpu_struct(struct vcpu *v);
#ifndef alloc_pirq_struct
struct pirq *alloc_pirq_struct(struct domain *);
#endif
-void free_pirq_struct(void *);
+void cf_check free_pirq_struct(void *);
/*
* Initialise/destroy arch-specific details of a VCPU.
--
generated by git-patchbot for /home/xen/git/xen.git#staging
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