From: Ben Hutchings <ben@decadent.org.uk>
Date: Mon, 7 Sep 2020 01:51:53 +0000 (+0100)
Subject: Export symbols needed by Android drivers
X-Git-Tag: archive/raspbian/6.12.27-1+rpi1^2^2^2^2^2^2^2^2^2^2^2^2^2^2^2^2^2^2^2^2~63
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/%22/%22http:/www.example.com/cgi/%22?a=commitdiff_plain;h=37112c91eaa7475fb334710107889c060a71ebfd;p=linux.git

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 a11e59b5d60..aa75e8a5da5 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -823,6 +823,7 @@ 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 ebf21373f66..821d783e8a4 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7338,6 +7338,7 @@ 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 51e38f5f470..8b3547706b0 100644
--- 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 2134ac8057a..77587455234 100644
--- 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 755ffe082e2..b56018b25e5 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1922,6 +1922,7 @@ 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 c1befe046c7..a2e2194468b 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4942,6 +4942,7 @@ 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 8cee5b6c6e6..1ae10c4b93f 100644
--- 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, 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, 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, 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, from, to, file);
 }
+EXPORT_SYMBOL_GPL(security_binder_transfer_file);
 
 /**
  * security_ptrace_access_check() - Check if tracing is allowed