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 3bcc1ecc314a78e90daedecf6a7ec575c642504a..6ff78a4c27a914253df67b0c3bf1ac7df6b87f0c 100644 (file)
--- a/fs/file.c
+++ b/fs/file.c
@@ -813,6 +813,7 @@ struct file *close_fd_get_file(unsigned int fd)
 
        return file;
 }
+EXPORT_SYMBOL_GPL(close_fd_get_file);
 
 void do_close_on_exec(struct files_struct *files)
 {

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index ee28253c9ac0c2ed4e602a9584b5e1a77c4f2825..37667d4aaac74f254c1f22b25048e01224d4a302 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7052,6 +7052,7 @@ static bool is_nice_reduction(const struct task_struct *p, const int nice)
 
        return (nice_rlim <= task_rlimit(p, RLIMIT_NICE));
 }
+EXPORT_SYMBOL_GPL(can_nice);
 
 /*
  * can_nice - check if a task can reduce its nice value

diff --git a/kernel/sched/wait.c b/kernel/sched/wait.c
index 9860bb9a847cf0572138cce9974545b004785558..ad76d49bf4e17fa3b43fe7a1f551de39d788045c 100644 (file)
--- a/kernel/sched/wait.c
+++ b/kernel/sched/wait.c
@@ -243,6 +243,7 @@ void __wake_up_pollfree(struct wait_queue_head *wq_head)
        /* POLLFREE must have cleared the queue. */
        WARN_ON_ONCE(waitqueue_active(wq_head));
 }
+EXPORT_SYMBOL_GPL(__wake_up_pollfree);
 
 /*
  * Note: we use "set_current_state()" _after_ the wait-queue add,

diff --git a/kernel/task_work.c b/kernel/task_work.c
index dff75bcde1514c82fc6580bcf407cd2ff7ae03cb..5f9a42a388f13756738d971fe714e41d457f27b4 100644 (file)
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
@@ -73,6 +73,7 @@ int task_work_add(struct task_struct *task, struct callback_head *work,
 
        return 0;
 }
+EXPORT_SYMBOL_GPL(task_work_add);
 
 /**
  * task_work_cancel_match - cancel a pending work added by task_work_add()

diff --git a/mm/memory.c b/mm/memory.c
index de0dbe09b013f6939129f493b4a609f8f056186b..564059e8ff1e87f2b7d8a6318c6e74d9c33a3244 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1759,6 +1759,7 @@ void zap_page_range(struct vm_area_struct *vma, unsigned long start,
        mmu_notifier_invalidate_range_end(&range);
        tlb_finish_mmu(&tlb);
 }
+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 42e5888bf84d8638dc19ce15ef0e81ed8291a910..afa1c0999644c0954da1b7e9a23a9ccef8e6ca67 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4245,6 +4245,7 @@ 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 4b95de24bc8dc2e15f315295b883d8a290fcd6fb..515d9509c001edd12557c17da8a3c422c1c1daf9 100644 (file)
--- a/security/security.c
+++ b/security/security.c
@@ -752,24 +752,28 @@ 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)
 {