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 abb8b7081d7a44e1f82cd1c862d25dfb63c8bb40..2f664a1753733d8ebebe352a62ec7c2294a2cc5b 100644 (file)
--- a/fs/file.c
+++ b/fs/file.c
@@ -409,6 +409,7 @@ struct files_struct *get_files_struct(struct task_struct *task)
 
        return files;
 }
+EXPORT_SYMBOL_GPL(get_files_struct);
 
 void put_files_struct(struct files_struct *files)
 {
@@ -421,6 +422,7 @@ void put_files_struct(struct files_struct *files)
                kmem_cache_free(files_cachep, files);
        }
 }
+EXPORT_SYMBOL_GPL(put_files_struct);
 
 void reset_files_struct(struct files_struct *files)
 {
@@ -534,6 +536,7 @@ out:
        spin_unlock(&files->file_lock);
        return error;
 }
+EXPORT_SYMBOL_GPL(__alloc_fd);
 
 static int alloc_fd(unsigned start, unsigned flags)
 {
@@ -612,6 +615,7 @@ void __fd_install(struct files_struct *files, unsigned int fd,
        rcu_assign_pointer(fdt->fd[fd], file);
        rcu_read_unlock_sched();
 }
+EXPORT_SYMBOL_GPL(__fd_install);
 
 void fd_install(unsigned int fd, struct file *file)
 {
@@ -676,6 +680,7 @@ 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 48ed22774efaa6c3d9bc7738d29cdb15d29ff02d..44c04b65ffdca679ee404237dc723f3afb1c1d23 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1123,6 +1123,7 @@ 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 5eccfb816d23b45f935f04b4941204ea58b8e1eb..f01c0bfaf59d6deef971c0befdc7100292e6e596 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4571,6 +4571,7 @@ 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/signal.c b/kernel/signal.c
index 284fc1600063bd082c897c125ef4cc20c0612e39..283ee461ddd15cb2036f853119f9e3249348f019 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1396,6 +1396,7 @@ struct sighand_struct *__lock_task_sighand(struct task_struct *tsk,
 
        return sighand;
 }
+EXPORT_SYMBOL_GPL(__lock_task_sighand);
 
 /*
  * send signal info to all the members of a group

diff --git a/kernel/task_work.c b/kernel/task_work.c
index 825f28259a19a285399171df9007ab01c19b42b1..165fe698e9d11a81717f7f4c4b37664d93a2bd38 100644 (file)
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
@@ -40,6 +40,7 @@ task_work_add(struct task_struct *task, struct callback_head *work, bool notify)
                set_notify_resume(task);
        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 f703fe8c83460202354ca1c8cc693eb99b682c2e..85ae7e8e2c63c45032b67d083084290859768992 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1370,6 +1370,7 @@ 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 bd8840082c941647cc77113dd8ec30d7a6beff46..49cc03e3f3429539a8e336ae6d1ca2065f280ee3 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4185,6 +4185,7 @@ 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/mm/vmalloc.c b/mm/vmalloc.c
index 9a8227afa0738ffa87d3604a28788141d1abdc9a..27d260c3b3ccbb6be958a15ed00bfed53965da12 100644 (file)
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2011,6 +2011,7 @@ int map_kernel_range_noflush(unsigned long addr, unsigned long size,
 {
        return vmap_page_range_noflush(addr, addr + size, prot, pages);
 }
+EXPORT_SYMBOL_GPL(map_kernel_range_noflush);
 
 /**
  * unmap_kernel_range_noflush - unmap kernel VM area
@@ -2161,6 +2162,7 @@ struct vm_struct *get_vm_area(unsigned long size, unsigned long flags)
                                  NUMA_NO_NODE, GFP_KERNEL,
                                  __builtin_return_address(0));
 }
+EXPORT_SYMBOL_GPL(get_vm_area);
 
 struct vm_struct *get_vm_area_caller(unsigned long size, unsigned long flags,
                                const void *caller)

diff --git a/security/security.c b/security/security.c
index 51de970fbb1edf5b7af588a13bc0f4a3932c93bf..b58c2e2bf5521f84630506eda33f40da3d0dfb1e 100644 (file)
--- a/security/security.c
+++ b/security/security.c
@@ -725,24 +725,28 @@ int security_binder_set_context_mgr(struct task_struct *mgr)
 {
        return call_int_hook(binder_set_context_mgr, 0, mgr);
 }
+EXPORT_SYMBOL_GPL(security_binder_set_context_mgr);
 
 int security_binder_transaction(struct task_struct *from,
                                struct task_struct *to)
 {
        return call_int_hook(binder_transaction, 0, from, to);
 }
+EXPORT_SYMBOL_GPL(security_binder_transaction);
 
 int security_binder_transfer_binder(struct task_struct *from,
                                    struct task_struct *to)
 {
        return call_int_hook(binder_transfer_binder, 0, from, to);
 }
+EXPORT_SYMBOL_GPL(security_binder_transfer_binder);
 
 int security_binder_transfer_file(struct task_struct *from,
                                  struct task_struct *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)
 {