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/5.9.6-1+rpi1^2^2^2~79
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=edd31924802895d7ddd09363f6c04e720b9fa71d;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 abb8b7081d7..2f664a17537 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 efc5493203a..7d5e390b4be 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1131,6 +1131,7 @@ 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 f788cd61df2..ede9475ba29 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4797,6 +4797,7 @@ 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 42b67d2cea3..842a0303aa4 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 613b2d634af..d621006f007 100644
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
@@ -58,6 +58,7 @@ task_work_add(struct task_struct *task, struct callback_head *work, int notify)
 
 	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 03c693ea59b..24ea01169ab 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1368,6 +1368,7 @@ 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 b2abca3f7f3..cc9a66808b2 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4158,6 +4158,7 @@ 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 128d20d2d6c..a3e656894d3 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1280,6 +1280,7 @@ overflow:
 	kmem_cache_free(vmap_area_cachep, va);
 	return ERR_PTR(-EBUSY);
 }
+EXPORT_SYMBOL_GPL(map_kernel_range_noflush);
 
 int register_vmap_purge_notifier(struct notifier_block *nb)
 {
@@ -2149,6 +2150,7 @@ 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 70a7ad357bc..6e2ad1fa598 100644
--- a/security/security.c
+++ b/security/security.c
@@ -725,24 +725,28 @@ 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)
 {