mirrors
/
deepin-kernel
mirror of https://github.com/deepin-community/kernel.git
8
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
deepin-kernel/mm/kasan
History
Yeoreum Yun 03844d95c0 kasan: remove kasan_find_vm_area() to prevent possible deadlock 
commit 6ee9b3d84775944fb8c8a447961cd01274ac671c upstream.

find_vm_area() couldn't be called in atomic_context.  If find_vm_area() is
called to reports vm area information, kasan can trigger deadlock like:

CPU0                                CPU1
vmalloc();
 alloc_vmap_area();
  spin_lock(&vn->busy.lock)
                                    spin_lock_bh(&some_lock);
   <interrupt occurs>
   <in softirq>
   spin_lock(&some_lock);
                                    <access invalid address>
                                    kasan_report();
                                     print_report();
                                      print_address_description();
                                       kasan_find_vm_area();
                                        find_vm_area();
                                         spin_lock(&vn->busy.lock) // deadlock!

To prevent possible deadlock while kasan reports, remove kasan_find_vm_area().

Link: https://lkml.kernel.org/r/20250703181018.580833-1-yeoreum.yun@arm.com
Fixes: c056a364e9 ("kasan: print virtual mapping info in reports")
Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
Reported-by: Yunseong Kim <ysk@kzalloc.com>
Reviewed-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 8377d7744bdce5c4b3f1b58924eebd3fdc078dfc)
 		2025-07-22 16:16:48 +08:00
..
Makefile kasan: test: fix test for new meminstrinsic instrumentation 2023-03-02 21:54:22 -08:00
common.c kasan: use internal prototypes matching gcc-13 builtins 2023-06-09 16:25:19 -07:00
generic.c kasan: fix type cast in memory_is_poisoned_n 2023-07-08 09:29:32 -07:00
hw_tags.c kasan: hw_tags: avoid invalid virt_to_page() 2023-05-02 17:23:27 -07:00
init.c LoongArch: Set initial pte entry with PAGE_GLOBAL for kernel space 2025-02-18 12:00:10 +08:00
kasan.h kasan: Cleanup the __HAVE_ARCH_SHADOW_MAP usage 2023-09-20 14:26:29 +08:00
kasan_test.c kasan: remove vmalloc_percpu test 2024-12-10 20:43:36 +08:00
kasan_test_module.c kasan: migrate workqueue_uaf test to kunit 2022-11-08 17:37:14 -08:00
quarantine.c kasan: fix lockdep report invalid wait context 2023-04-21 14:51:59 -07:00
report.c kasan: remove kasan_find_vm_area() to prevent possible deadlock 2025-07-22 16:16:48 +08:00
report_generic.c kasan: use internal prototypes matching gcc-13 builtins 2023-06-09 16:25:19 -07:00
report_hw_tags.c kasan: use internal prototypes matching gcc-13 builtins 2023-06-09 16:25:19 -07:00
report_sw_tags.c kasan: use internal prototypes matching gcc-13 builtins 2023-06-09 16:25:19 -07:00
report_tags.c kasan: infer allocation size by scanning metadata 2023-02-09 16:51:40 -08:00
shadow.c kasan: use unchecked __memset internally 2025-06-20 14:40:21 +08:00
sw_tags.c kasan: use internal prototypes matching gcc-13 builtins 2023-06-09 16:25:19 -07:00
tags.c kasan,kmsan: remove __GFP_KSWAPD_RECLAIM usage from kasan/kmsan 2023-06-23 16:59:26 -07:00