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 3b683b9101d841b65f568e946915acc565e8b90a..3518e86cd4ef188b8c157107129be2c4290f5260 100644 (file)
--- a/fs/file.c
+++ b/fs/file.c
@@ -818,6 +818,7 @@ struct file *file_close_fd(unsigned int fd)
 
        return file;
 }
+EXPORT_SYMBOL_GPL(file_close_fd);
 
 void do_close_on_exec(struct files_struct *files)
 {

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index d3aef6283931e00839a72301e1a9723b1469956a..5726ad8bf746b5fc07880be0c3c8d4d78573901e 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7318,6 +7318,7 @@ static bool is_nice_reduction(const struct task_struct *p, const int nice)
 
        return (nice_rlim <= task_rlimit(p, RLIMIT_NICE));
 }
+EXPORT_SYMBOL_GPL(can_nice);
 
 /*
  * can_nice - check if a task can reduce its nice value

diff --git a/kernel/sched/wait.c b/kernel/sched/wait.c
index 51e38f5f47018c953e31c834dc6385c182359359..8b3547706b00a8e07363253f61f6d08e83ff966e 100644 (file)
--- a/kernel/sched/wait.c
+++ b/kernel/sched/wait.c
@@ -212,6 +212,7 @@ 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 95a7e1b7f1dab2d3e5eef4b16e2cefe7f25f2f22..972c3280337e8f80be6acae4651b49469d9d4694 100644 (file)
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
@@ -73,6 +73,7 @@ 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 296e4f05e877819c90ed4c6af9090696c91ba1f3..4322bcd27c34a18242aa0ad8c834921e9c49286e 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1795,6 +1795,7 @@ void zap_page_range_single(struct vm_area_struct *vma, unsigned long address,
        tlb_finish_mmu(&tlb);
        hugetlb_zap_end(vma, details);
 }
+EXPORT_SYMBOL_GPL(zap_page_range_single);
 
 /**
  * zap_vma_ptes - remove ptes mapping the vma

diff --git a/mm/shmem.c b/mm/shmem.c
index 935f3647bb3a1078adf47dd2a320f22265e7eaff..6b3e43d1a3272dffa378bd79d984b6b9fa524436 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4879,6 +4879,7 @@ int shmem_zero_setup(struct vm_area_struct *vma)
 
        return 0;
 }
+EXPORT_SYMBOL_GPL(shmem_zero_setup);
 
 /**
  * shmem_read_folio_gfp - read into page cache, using specified page allocation flags.

diff --git a/security/security.c b/security/security.c
index a344b8fa5530d5ac87b3e5821f5a6844b8a7d351..1f604024f29fd74787af8a618e50b01da684da82 100644 (file)
--- a/security/security.c
+++ b/security/security.c
@@ -890,6 +890,7 @@ 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);
 
 /**
  * security_binder_transaction() - Check if a binder transaction is allowed
@@ -905,6 +906,7 @@ int security_binder_transaction(const struct cred *from,
 {
        return call_int_hook(binder_transaction, 0, from, to);
 }
+EXPORT_SYMBOL_GPL(security_binder_transaction);
 
 /**
  * security_binder_transfer_binder() - Check if a binder transfer is allowed
@@ -920,6 +922,7 @@ int security_binder_transfer_binder(const struct cred *from,
 {
        return call_int_hook(binder_transfer_binder, 0, from, to);
 }
+EXPORT_SYMBOL_GPL(security_binder_transfer_binder);
 
 /**
  * security_binder_transfer_file() - Check if a binder file xfer is allowed
@@ -936,6 +939,7 @@ int security_binder_transfer_file(const struct cred *from,
 {
        return call_int_hook(binder_transfer_file, 0, from, to, file);
 }
+EXPORT_SYMBOL_GPL(security_binder_transfer_file);
 
 /**
  * security_ptrace_access_check() - Check if tracing is allowed