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 ee931734670257393aa9ee1383596e233c69d05b..9885f25f5340c40deae7de142e2b984e6b1b2047 100644 (file)
--- a/fs/file.c
+++ b/fs/file.c
@@ -833,6 +833,7 @@ int close_fd_get_file(unsigned int fd, struct file **res)
 
        return ret;
 }
+EXPORT_SYMBOL_GPL(close_fd_get_file);
 
 void do_close_on_exec(struct files_struct *files)
 {

diff --git a/kernel/fork.c b/kernel/fork.c
index 35a3beff140b6dccb6b4f1e7971df9eb6aa85bf7..1e9ecaa4f5ac5f6c73ed3cf0ea029288eb0ab639 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1222,6 +1222,7 @@ 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 d58c0389eb23c9fb8f87afc73b2bc7c5a0cd4439..b4ca294b5100025e9c01f12ea55825d6b050cf88 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6940,6 +6940,7 @@ 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/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 c59e1a49bc406c7a2cb0e05a36053dd3ad13a9ba..d92b8726b1d4882794ab2cfd32c46af9a5c41403 100644 (file)
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
@@ -60,6 +60,7 @@ 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 76e3af9639d93fa34993693725aac4350febf07d..90a8d87308767604af65bc4a3ef7deeb24b5eaaa 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1671,6 +1671,7 @@ 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 4b2fea33158e8a33a87354ccefc574ef74c1e793..0fcd0cfea35df3fb6743894167db121dc03ff1c2 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4153,6 +4153,7 @@ 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 aaf6566deb9f0e8153ab777c56b790e561d7806a..f32e312ef6fcb00ddd0910a03ce0c8e7ecb673b0 100644 (file)
--- a/security/security.c
+++ b/security/security.c
@@ -753,24 +753,28 @@ 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)
 {