linux-kernel - [PATCH 1/2] kmsan: add missing _

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Date: Thu, 27 Jun 2024 16:57:46 +0200
From: Ilya Leoshkevich <iii@...ux.ibm.com>
To: Alexander Potapenko <glider@...gle.com>, Marco Elver <elver@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc: kasan-dev@...glegroups.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Ilya Leoshkevich <iii@...ux.ibm.com>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH 1/2] kmsan: add missing __user tags

sparse complains that __user pointers are being passed to functions
that expect non-__user ones.  In all cases, these functions are in fact
working with user pointers, only the tag is missing. Add it.

Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202406272033.KejtfLkw-lkp@intel.com/
Signed-off-by: Ilya Leoshkevich <iii@...ux.ibm.com>
---
 mm/kmsan/core.c   | 4 ++--
 mm/kmsan/kmsan.h  | 6 +++---
 mm/kmsan/report.c | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/mm/kmsan/core.c b/mm/kmsan/core.c
index 81b22220711a..a495debf1436 100644
--- a/mm/kmsan/core.c
+++ b/mm/kmsan/core.c
@@ -249,8 +249,8 @@ struct page *kmsan_vmalloc_to_page_or_null(void *vaddr)
 		return NULL;
 }
 
-void kmsan_internal_check_memory(void *addr, size_t size, const void *user_addr,
-				 int reason)
+void kmsan_internal_check_memory(void *addr, size_t size,
+				 const void __user *user_addr, int reason)
 {
 	depot_stack_handle_t cur_origin = 0, new_origin = 0;
 	unsigned long addr64 = (unsigned long)addr;
diff --git a/mm/kmsan/kmsan.h b/mm/kmsan/kmsan.h
index 91a360a31e85..29555a8bc315 100644
--- a/mm/kmsan/kmsan.h
+++ b/mm/kmsan/kmsan.h
@@ -73,7 +73,7 @@ void kmsan_print_origin(depot_stack_handle_t origin);
  * @off_last corresponding to different @origin values.
  */
 void kmsan_report(depot_stack_handle_t origin, void *address, int size,
-		  int off_first, int off_last, const void *user_addr,
+		  int off_first, int off_last, const void __user *user_addr,
 		  enum kmsan_bug_reason reason);
 
 DECLARE_PER_CPU(struct kmsan_ctx, kmsan_percpu_ctx);
@@ -163,8 +163,8 @@ depot_stack_handle_t kmsan_internal_chain_origin(depot_stack_handle_t id);
 void kmsan_internal_task_create(struct task_struct *task);
 
 bool kmsan_metadata_is_contiguous(void *addr, size_t size);
-void kmsan_internal_check_memory(void *addr, size_t size, const void *user_addr,
-				 int reason);
+void kmsan_internal_check_memory(void *addr, size_t size,
+				 const void __user *user_addr, int reason);
 
 struct page *kmsan_vmalloc_to_page_or_null(void *vaddr);
 void kmsan_setup_meta(struct page *page, struct page *shadow,
diff --git a/mm/kmsan/report.c b/mm/kmsan/report.c
index 92e73ec61435..94a3303fb65e 100644
--- a/mm/kmsan/report.c
+++ b/mm/kmsan/report.c
@@ -148,7 +148,7 @@ void kmsan_print_origin(depot_stack_handle_t origin)
 }
 
 void kmsan_report(depot_stack_handle_t origin, void *address, int size,
-		  int off_first, int off_last, const void *user_addr,
+		  int off_first, int off_last, const void __user *user_addr,
 		  enum kmsan_bug_reason reason)
 {
 	unsigned long stack_entries[KMSAN_STACK_DEPTH];
-- 
2.45.2