From: Ben Hutchings <ben@decadent.org.uk>
Date: Tue, 26 Jun 2018 15:59:01 +0000 (+0100)
Subject: Export symbols needed by Android drivers
X-Git-Tag: archive/raspbian/5.7.6-1+rpi1^2^2~96
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=7fb04cdbaae1bb5383ec50502a32bd64e329278e;p=linux.git

Export symbols needed by Android drivers

Bug-Debian: https://bugs.debian.org/901492

We want to enable use of the Android ashmem and binder drivers to
support Anbox, but they should not be built-in as that would waste
resources and increase security attack surface on systems that don't
need them.

Export the currently un-exported symbols they depend on.


Gbp-Pq: Topic debian
Gbp-Pq: Name export-symbols-needed-by-android-drivers.patch
---

diff --git a/fs/file.c b/fs/file.c
index c8a4e4c86e5..c2c2030975e 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -409,6 +409,7 @@ struct files_struct *get_files_struct(struct task_struct *task)
 
 	return files;
 }
+EXPORT_SYMBOL_GPL(get_files_struct);
 
 void put_files_struct(struct files_struct *files)
 {
@@ -421,6 +422,7 @@ void put_files_struct(struct files_struct *files)
 		kmem_cache_free(files_cachep, files);
 	}
 }
+EXPORT_SYMBOL_GPL(put_files_struct);
 
 void reset_files_struct(struct files_struct *files)
 {
@@ -534,6 +536,7 @@ out:
 	spin_unlock(&files->file_lock);
 	return error;
 }
+EXPORT_SYMBOL_GPL(__alloc_fd);
 
 static int alloc_fd(unsigned start, unsigned flags)
 {
@@ -612,6 +615,7 @@ void __fd_install(struct files_struct *files, unsigned int fd,
 	rcu_assign_pointer(fdt->fd[fd], file);
 	rcu_read_unlock_sched();
 }
+EXPORT_SYMBOL_GPL(__fd_install);
 
 void fd_install(unsigned int fd, struct file *file)
 {
@@ -676,6 +680,7 @@ out_unlock:
 	*res = NULL;
 	return -ENOENT;
 }
+EXPORT_SYMBOL(__close_fd_get_file);
 
 void do_close_on_exec(struct files_struct *files)
 {
diff --git a/kernel/fork.c b/kernel/fork.c
index c9ba2b7bfef..c700518c0d6 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1120,6 +1120,7 @@ void mmput_async(struct mm_struct *mm)
 		schedule_work(&mm->async_put_work);
 	}
 }
+EXPORT_SYMBOL_GPL(mmput_async);
 #endif
 
 /**
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 3dd67569730..d56ae0f089f 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4561,6 +4561,7 @@ int can_nice(const struct task_struct *p, const int nice)
 	return (nice_rlim <= task_rlimit(p, RLIMIT_NICE) ||
 		capable(CAP_SYS_NICE));
 }
+EXPORT_SYMBOL_GPL(can_nice);
 
 #ifdef __ARCH_WANT_SYS_NICE
 
diff --git a/kernel/signal.c b/kernel/signal.c
index 9abf962bbde..a393e8bb963 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1396,6 +1396,7 @@ struct sighand_struct *__lock_task_sighand(struct task_struct *tsk,
 
 	return sighand;
 }
+EXPORT_SYMBOL_GPL(__lock_task_sighand);
 
 /*
  * send signal info to all the members of a group
diff --git a/kernel/task_work.c b/kernel/task_work.c
index 0fef395662a..9233b200c09 100644
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
@@ -40,6 +40,7 @@ task_work_add(struct task_struct *task, struct callback_head *work, bool notify)
 		set_notify_resume(task);
 	return 0;
 }
+EXPORT_SYMBOL(task_work_add);
 
 /**
  * task_work_cancel - cancel a pending work added by task_work_add()
diff --git a/mm/memory.c b/mm/memory.c
index e8bfdf0d9d1..c271499b7dc 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1358,6 +1358,7 @@ void zap_page_range(struct vm_area_struct *vma, unsigned long start,
 	mmu_notifier_invalidate_range_end(&range);
 	tlb_finish_mmu(&tlb, start, range.end);
 }
+EXPORT_SYMBOL_GPL(zap_page_range);
 
 /**
  * zap_page_range_single - remove user pages in a given range
diff --git a/mm/shmem.c b/mm/shmem.c
index 153d889e32d..25ceb80b40c 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4193,6 +4193,7 @@ int shmem_zero_setup(struct vm_area_struct *vma)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(shmem_zero_setup);
 
 /**
  * shmem_read_mapping_page_gfp - read into page cache, using specified page allocation flags.
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index cf39e15242c..7970d06c220 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2011,6 +2011,7 @@ int map_kernel_range_noflush(unsigned long addr, unsigned long size,
 {
 	return vmap_page_range_noflush(addr, addr + size, prot, pages);
 }
+EXPORT_SYMBOL_GPL(map_kernel_range_noflush);
 
 /**
  * unmap_kernel_range_noflush - unmap kernel VM area
@@ -2161,6 +2162,7 @@ struct vm_struct *get_vm_area(unsigned long size, unsigned long flags)
 				  NUMA_NO_NODE, GFP_KERNEL,
 				  __builtin_return_address(0));
 }
+EXPORT_SYMBOL_GPL(get_vm_area);
 
 struct vm_struct *get_vm_area_caller(unsigned long size, unsigned long flags,
 				const void *caller)
diff --git a/security/security.c b/security/security.c
index 565bc9b6727..3e781624386 100644
--- a/security/security.c
+++ b/security/security.c
@@ -706,24 +706,28 @@ int security_binder_set_context_mgr(struct task_struct *mgr)
 {
 	return call_int_hook(binder_set_context_mgr, 0, mgr);
 }
+EXPORT_SYMBOL_GPL(security_binder_set_context_mgr);
 
 int security_binder_transaction(struct task_struct *from,
 				struct task_struct *to)
 {
 	return call_int_hook(binder_transaction, 0, from, to);
 }
+EXPORT_SYMBOL_GPL(security_binder_transaction);
 
 int security_binder_transfer_binder(struct task_struct *from,
 				    struct task_struct *to)
 {
 	return call_int_hook(binder_transfer_binder, 0, from, to);
 }
+EXPORT_SYMBOL_GPL(security_binder_transfer_binder);
 
 int security_binder_transfer_file(struct task_struct *from,
 				  struct task_struct *to, struct file *file)
 {
 	return call_int_hook(binder_transfer_file, 0, from, to, file);
 }
+EXPORT_SYMBOL_GPL(security_binder_transfer_file);
 
 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
 {