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 97d212a9b814454b83091e9a1dc40b76fe908b38..fab4b4f73d5bf65365604761201caacfc54ca054 100644 (file)
--- a/fs/file.c
+++ b/fs/file.c
@@ -804,6 +804,7 @@ 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 10885c649ca42c9488bb97f90bb74458f1ca19c9..0fb1d884af77d70223c34163cf92ee1d4b3ffd90 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1153,6 +1153,7 @@ 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 0d12ec7be3017a5414259336001aa7dcf849960f..57046ac84be25e57d57b6b1a9f801f50bbd229fb 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6935,6 +6935,7 @@ 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 eca38107b32f162adad278aee6e522bdfe04c026..2e645b076916c08275b4653269beba732d14a774 100644 (file)
--- a/kernel/sched/wait.c
+++ b/kernel/sched/wait.c
@@ -244,6 +244,7 @@ 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 1698fbe6f0e134ac2a2ab3e9357b44af99c71f83..2a1644189182f978c74845c82d574389cc588118 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 c52be6d6b6055f0b99cf2c4cc8ca18bc7521110e..43012ba7ede7278665054937461abe017b20a420 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1655,6 +1655,7 @@ 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 b5860f4a2738ee3861e30bd4e506578a0f9218ba..c1f352f4717d7fb000d1c7fd21694eba1f246796 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4162,6 +4162,7 @@ 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 67264cb08fb31f17fd65bb1da6fde7f4145fe018..3df62aa37ac09c3b845180440fffe115de874d5a 100644 (file)
--- a/security/security.c
+++ b/security/security.c
@@ -751,24 +751,28 @@ 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)
 {