From: Ben Hutchings <ben@decadent.org.uk>
Date: Mon, 7 Sep 2020 01:51:53 +0000 (+0100)
Subject: Export symbols needed by Android drivers
X-Git-Tag: archive/raspbian/5.10.84-1+rpi1^2~77
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=7a7bd88f1b7276ee9f147e62da2271e2465ad303;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 9d02352fa18..add386da324 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -780,6 +780,7 @@ 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 e465903abed..6a3e9290c09 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1127,6 +1127,7 @@ 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 0a5f9fad45e..430ac59cd0d 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5043,6 +5043,7 @@ 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/task_work.c b/kernel/task_work.c
index 8d6e1217c45..7cf8f9a6b64 100644
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
@@ -68,6 +68,7 @@ int task_work_add(struct task_struct *task, struct callback_head *work,
 
 	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 4fe24cd865a..143bc50d349 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1554,6 +1554,7 @@ 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 ae8adca3b56..45bc9dcba83 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4283,6 +4283,7 @@ 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/security/security.c b/security/security.c
index a864ff824dd..5ae0ca978fe 100644
--- a/security/security.c
+++ b/security/security.c
@@ -727,24 +727,28 @@ int security_binder_set_context_mgr(const struct cred *mgr)
 {
 	return call_int_hook(binder_set_context_mgr, 0, mgr);
 }
+EXPORT_SYMBOL_GPL(security_binder_set_context_mgr);
 
 int security_binder_transaction(const struct cred *from,
 				const struct cred *to)
 {
 	return call_int_hook(binder_transaction, 0, from, to);
 }
+EXPORT_SYMBOL_GPL(security_binder_transaction);
 
 int security_binder_transfer_binder(const struct cred *from,
 				    const struct cred *to)
 {
 	return call_int_hook(binder_transfer_binder, 0, from, to);
 }
+EXPORT_SYMBOL_GPL(security_binder_transfer_binder);
 
 int security_binder_transfer_file(const struct cred *from,
 				  const struct cred *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)
 {