Export symbols needed by Android drivers

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 780d29e588470097afd6249186e838aab3f5d74b..82dcfd3cf3dc39003391649f2ce268b623a638d3 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)
 {
@@ -607,6 +610,7 @@ 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)
 {

diff --git a/kernel/fork.c b/kernel/fork.c
index 64ef113e387ed047ad242980bb881147009ba38d..1fdb37897ea5c641e99408a7579b07cf5d9876ec 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1039,6 +1039,7 @@ 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 d7f409866cdf5dde28128b56fccf21f8f2773c77..96ded01da383bcd0f07c2bb2ab580714c2035fad 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3932,6 +3932,7 @@ 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 9102d60fc5c62d04cd80ab0e7e363ee5d472a4f8..8365b1f3c5ec580b89991cdd653eb5bc74c96acb 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1353,6 +1353,7 @@ 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/mm/memory.c b/mm/memory.c
index 5b3f71bcd1aef6c89c6fa025c50c698c1aebf01a..9b9e1c55593426901f9749249edeb32f9b6958e0 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1611,6 +1611,7 @@ void zap_page_range(struct vm_area_struct *vma, unsigned long start,
        mmu_notifier_invalidate_range_end(mm, start, end);
        tlb_finish_mmu(&tlb, start, 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 3c8742655756c15ef8c54112c7213cfd315391f2..bef7be4afba8cfe75a6e5ef81b560753fa65a001 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4039,6 +4039,7 @@ 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 a46ec261a44e8531088e16877c323342886e00f0..81f3e9062d29f92c1cb1ab9462a7e1e21a1d20fe 100644 (file)
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1299,6 +1299,7 @@ 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
@@ -1439,6 +1440,7 @@ 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 5ce2448f3a45415be399f6537a2d3ceb85e269f3..b49b5312f76c7e82b51f90c282dc33a67e4f0e13 100644 (file)
--- a/security/security.c
+++ b/security/security.c
@@ -236,24 +236,28 @@ 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)
 {