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Date: Wed, 17 Mar 2021 16:36:12 +0800
From: kernel test robot <oliver.sang@...el.com>
To: glittao@...il.com
Cc: 0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
lkp@...ts.01.org, cl@...ux.com, penberg@...nel.org,
rientjes@...gle.com, iamjoonsoo.kim@....com,
akpm@...ux-foundation.org, vbabka@...e.cz, shuah@...nel.org,
linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
Oliver Glitta <glittao@...il.com>
Subject: [selftests] e48d82b67a:
BUG_TestSlub_RZ_alloc(Not_tainted):Redzone_overwritten
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: e48d82b67a2b760eedf7b95ca15f41267496386c ("[PATCH 1/2] selftests: add a kselftest for SLUB debugging functionality")
url: https://github.com/0day-ci/linux/commits/glittao-gmail-com/selftests-add-a-kselftest-for-SLUB-debugging-functionality/20210316-204257
base: https://git.kernel.org/cgit/linux/kernel/git/shuah/linux-kselftest.git next
in testcase: trinity
version: trinity-static-i386-x86_64-f93256fb_2019-08-28
with following parameters:
group: group-04
test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/
on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+---------------------------------------------------------------------------------------------------------------+-----------+------------+
| | v5.12-rc2 | e48d82b67a |
+---------------------------------------------------------------------------------------------------------------+-----------+------------+
| BUG_TestSlub_RZ_alloc(Not_tainted):Redzone_overwritten | 0 | 69 |
| INFO:0x(ptrval)-0x(ptrval)@offset=#.First_byte#instead_of | 0 | 69 |
| INFO:Allocated_in_resiliency_test_age=#cpu=#pid= | 0 | 69 |
| INFO:Slab0x(ptrval)objects=#used=#fp=0x(ptrval)flags= | 0 | 69 |
| INFO:Object0x(ptrval)@offset=#fp=0x(ptrval) | 0 | 69 |
| BUG_TestSlub_next_ptr_free(Tainted:G_B):Freechain_corrupt | 0 | 69 |
| INFO:Freed_in_resiliency_test_age=#cpu=#pid= | 0 | 69 |
| BUG_TestSlub_next_ptr_free(Tainted:G_B):Wrong_object_count.Counter_is#but_counted_were | 0 | 69 |
| BUG_TestSlub_next_ptr_free(Tainted:G_B):Redzone_overwritten | 0 | 69 |
| BUG_TestSlub_next_ptr_free(Tainted:G_B):Objects_remaining_in_TestSlub_next_ptr_free_on__kmem_cache_shutdown() | 0 | 69 |
| INFO:Object0x(ptrval)@offset= | 0 | 69 |
| BUG_TestSlub_1th_word_free(Tainted:G_B):Poison_overwritten | 0 | 69 |
| BUG_TestSlub_50th_word_free(Tainted:G_B):Poison_overwritten | 0 | 69 |
| BUG_TestSlub_RZ_free(Tainted:G_B):Redzone_overwritten | 0 | 69 |
+---------------------------------------------------------------------------------------------------------------+-----------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 22.154049] random: get_random_u32 called from __kmem_cache_create+0x23/0x3e0 with crng_init=0
[ 22.154070] random: get_random_u32 called from cache_random_seq_create+0x7c/0x140 with crng_init=0
[ 22.154167] random: get_random_u32 called from allocate_slab+0x155/0x5e0 with crng_init=0
[ 22.154690] test_slub: 1. kmem_cache: Clobber Redzone 0x12->0x(ptrval)
[ 22.164499] =============================================================================
[ 22.166629] BUG TestSlub_RZ_alloc (Not tainted): Redzone overwritten
[ 22.168179] -----------------------------------------------------------------------------
[ 22.168179]
[ 22.168372] Disabling lock debugging due to kernel taint
[ 22.168372] INFO: 0x(ptrval)-0x(ptrval) @offset=1064. First byte 0x12 instead of 0xcc
[ 22.168372] INFO: Allocated in resiliency_test+0x47/0x1be age=3 cpu=0 pid=1
[ 22.168372] __slab_alloc+0x57/0x80
[ 22.168372] kmem_cache_alloc (kbuild/src/consumer/mm/slub.c:2871 kbuild/src/consumer/mm/slub.c:2915 kbuild/src/consumer/mm/slub.c:2920)
[ 22.168372] resiliency_test (kbuild/src/consumer/lib/test_slub.c:34 kbuild/src/consumer/lib/test_slub.c:107)
[ 22.168372] test_slub_init (kbuild/src/consumer/lib/test_slub.c:124)
[ 22.168372] do_one_initcall (kbuild/src/consumer/init/main.c:1226)
[ 22.168372] kernel_init_freeable (kbuild/src/consumer/init/main.c:1298 kbuild/src/consumer/init/main.c:1315 kbuild/src/consumer/init/main.c:1335 kbuild/src/consumer/init/main.c:1537)
[ 22.168372] kernel_init (kbuild/src/consumer/init/main.c:1426)
[ 22.168372] ret_from_fork (kbuild/src/consumer/arch/x86/entry/entry_32.S:856)
[ 22.168372] INFO: Slab 0x(ptrval) objects=16 used=1 fp=0x(ptrval) flags=0x40000201
[ 22.168372] INFO: Object 0x(ptrval) @offset=1000 fp=0x(ptrval)
[ 22.168372]
[ 22.168372] Redzone (ptrval): cc cc cc cc cc cc cc cc ........
[ 22.168372] Object (ptrval): 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
[ 22.168372] Object (ptrval): 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk.
[ 22.168372] Redzone (ptrval): 12 cc cc cc ....
[ 22.168372] Padding (ptrval): 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ
[ 22.168372] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G B 5.12.0-rc2-00001-ge48d82b67a2b #1
[ 22.168372] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 22.168372] Call Trace:
[ 22.168372] dump_stack (kbuild/src/consumer/lib/dump_stack.c:122)
[ 22.168372] print_trailer (kbuild/src/consumer/mm/slub.c:737)
[ 22.168372] check_bytes_and_report.cold (kbuild/src/consumer/mm/slub.c:807)
[ 22.168372] check_object (kbuild/src/consumer/mm/slub.c:914)
[ 22.168372] validate_slab (kbuild/src/consumer/mm/slub.c:4635)
To reproduce:
# build kernel
cd linux
cp config-5.12.0-rc2-00001-ge48d82b67a2b .config
make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 olddefconfig prepare modules_prepare bzImage
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
---
0DAY/LKP+ Test Infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation
Thanks,
Oliver Sang
View attachment "config-5.12.0-rc2-00001-ge48d82b67a2b" of type "text/plain" (267937 bytes)
View attachment "job-script" of type "text/plain" (4061 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (18724 bytes)
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