On Thu, 2020-07-09 at 23:34 +0800, kernel test robot wrote:
tree:
https://urldefense.com/v3/__https://github.com/hnaz/linux-mm__;!!CTRNKA9w...
master
head: 12c0de83d877ea6b9078782f10f7a4a196aa16b1
commit: 16d798d57643c9b50fe8922c8324081f3c5bec78 [145/290] rcu: kasan: record and print
call_rcu() call stack
config: s390-allyesconfig (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget
https://urldefense.com/v3/__https://raw.githubusercontent.com/intel/lkp-t...
-O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout 16d798d57643c9b50fe8922c8324081f3c5bec78
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
Note: the hnaz-linux-mm/master HEAD 12c0de83d877ea6b9078782f10f7a4a196aa16b1 builds
fine.
It only hurts bisectibility.
All error/warnings (new ones prefixed by >>):
mm/kasan/report.c: In function 'kasan_addr_to_page':
mm/kasan/report.c:130:12: warning: ordered comparison of pointer with null pointer
[-Wextra]
130 | if ((addr >= (void *)PAGE_OFFSET) &&
| ^~
mm/kasan/report.c: In function 'kasan_get_free_track':
>> mm/kasan/report.c:185:20: error: 'struct kasan_alloc_meta' has no member
named 'free_track'
185 | return &alloc_meta->free_track[i];
| ^~
>> mm/kasan/report.c:172:6: warning: variable 'i' set but not used
[-Wunused-but-set-variable]
172 | int i = 0;
| ^
>> mm/kasan/report.c:186:1: warning: control reaches end of non-void function
[-Wreturn-type]
186 | }
| ^
--
mm/kasan/common.c: In function 'kasan_set_free_info':
>> mm/kasan/common.c:316:23: error: 'struct kasan_alloc_meta' has no member
named 'free_track'
316 | set_track(&alloc_meta->free_track[idx], GFP_NOWAIT);
| ^~
Hi,
It should not be a problem, this commit("rcu: kasan: record and print
call_rcu() call stack") need to depend my another commit ("kasan: record
and print the free track"). They is the same series, please see below
information. Thanks.
The series (4):
rcu: kasan: record and print call_rcu() call stack
kasan: record and print the free track
kasan: add tests for call_rcu stack recording
kasan: update documentation for generic kasan
>> mm/kasan/common.c:306:5: warning: variable 'idx' set
but not used [-Wunused-but-set-variable]
306 | u8 idx = 0;
| ^~~
vim +185 mm/kasan/report.c
0c06f1f86c87b1 Andrey Konovalov 2017-05-03 167
ae8f06b31a83e5 Walter Wu 2019-09-23 168 static struct kasan_track
*kasan_get_free_track(struct kmem_cache *cache,
ae8f06b31a83e5 Walter Wu 2019-09-23 169 void *object, u8 tag)
ae8f06b31a83e5 Walter Wu 2019-09-23 170 {
ae8f06b31a83e5 Walter Wu 2019-09-23 171 struct kasan_alloc_meta *alloc_meta;
ae8f06b31a83e5 Walter Wu 2019-09-23 @172 int i = 0;
ae8f06b31a83e5 Walter Wu 2019-09-23 173
ae8f06b31a83e5 Walter Wu 2019-09-23 174 alloc_meta = get_alloc_info(cache,
object);
ae8f06b31a83e5 Walter Wu 2019-09-23 175
ae8f06b31a83e5 Walter Wu 2019-09-23 176 #ifdef CONFIG_KASAN_SW_TAGS_IDENTIFY
ae8f06b31a83e5 Walter Wu 2019-09-23 177 for (i = 0; i <
KASAN_NR_FREE_STACKS; i++) {
ae8f06b31a83e5 Walter Wu 2019-09-23 178 if (alloc_meta->free_pointer_tag[i]
== tag)
ae8f06b31a83e5 Walter Wu 2019-09-23 179 break;
ae8f06b31a83e5 Walter Wu 2019-09-23 180 }
ae8f06b31a83e5 Walter Wu 2019-09-23 181 if (i == KASAN_NR_FREE_STACKS)
ae8f06b31a83e5 Walter Wu 2019-09-23 182 i = alloc_meta->free_track_idx;
ae8f06b31a83e5 Walter Wu 2019-09-23 183 #endif
ae8f06b31a83e5 Walter Wu 2019-09-23 184
ae8f06b31a83e5 Walter Wu 2019-09-23 @185 return
&alloc_meta->free_track[i];
ae8f06b31a83e5 Walter Wu 2019-09-23 @186 }
ae8f06b31a83e5 Walter Wu 2019-09-23 187
:::::: The code at line 185 was first introduced by commit
:::::: ae8f06b31a83e54777514308a63f669a1fed519e kasan: add memory corruption
identification for software tag-based mode
:::::: TO: Walter Wu <walter-zh.wu(a)mediatek.com>
:::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://urldefense.com/v3/__https://lists.01.org/hyperkitty/list/kbuild-a...