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 975b1227a2f6d993c4477cc1843bdbe06d07d00d..fffdf020f0bae8b3ee29dcd69c147db4326b6017 100644 (file)
--- a/fs/file.c
+++ b/fs/file.c
@@ -789,6 +789,7 @@ int close_fd_get_file(unsigned int fd, struct file **res)
 
        return ret;
 }
+EXPORT_SYMBOL(close_fd_get_file);
 
 void do_close_on_exec(struct files_struct *files)
 {

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 7cf45d506688cbd43bbad84f12e0a5a090054a91..9a33ac69104ccead6ff5ed92a6f82e1d5c4c3232 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5048,6 +5048,7 @@ 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 a55642aa3f68b98940140fca6610cbd6694bd754..0674c60a77d8840aa48f178b43a3f78436195df1 100644 (file)
--- a/kernel/sched/wait.c
+++ b/kernel/sched/wait.c
@@ -229,6 +229,7 @@ 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 6138e13dce3d6c6bc8674b9b5ee1052ffc0c8b57..238bde6b2b16cb43fa7260bc967dd34a6e40d470 100644 (file)
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
@@ -57,6 +57,7 @@ int task_work_add(struct task_struct *task, struct callback_head *work,
 
        return 0;
 }
+EXPORT_SYMBOL(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 29cce8aadb6185d80ea9cfb7c64df0718c1fa621..9ddfa9f38fe7c668fec091a76a4e4ad94aa6ca6c 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1578,6 +1578,7 @@ 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 6666114ed53bbe48bdea843f6f3ac6fb7f3e58f1..c9556bf6b1f466b19038ca764b4bca5baa0084b8 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4305,6 +4305,7 @@ 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 f836f292ea16c3eef14771be0c23cf0393bbbd43..8677f67f40df85b889bff2c08e937b711988effc 100644 (file)
--- a/security/security.c
+++ b/security/security.c
@@ -729,24 +729,28 @@ 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)
 {