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 3244cc56b697d7e3a5b3a87d1ed580fb64db1954..eaaa75d95c87dea0c48a869139834ec3c3a0b334 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1151,6 +1151,7 @@ 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 77563109c0ea0111d9783a246585fd4d2b5e2531..95487b8e0279babe12ef275c3c158b74ed9cfdaf 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6912,6 +6912,7 @@ 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 8f1de811a1dcb52e7120169afdff5f5a6e275668..024d6dbd6f7491a0af4f4eb2f4e053e26c512316 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1641,6 +1641,7 @@ 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 f6b0f53f8a3202c6b65fafd381066bafb38753e9..94c77bf2140ee529b6df1344f5cd944ea9290721 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4146,6 +4146,7 @@ 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 64abdfb20bc2cb2513abd03896fd183b952d11fe..d3d2b842f311dea9326191831ef8c394e63a04bb 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)
 {