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Date:   Sat, 27 Feb 2021 19:44:40 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Chaitanya Kulkarni <chaitanya.kulkarni@....com>
Cc:     0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
        lkp@...ts.01.org, axboe@...nel.dk, viro@...iv.linux.org.uk,
        rostedt@...dmis.org, mingo@...hat.com, chaitanya.kulkarni@....com,
        johannes.thumshirn@....com, damien.lemoal@....com,
        bvanassche@....org, dongli.zhang@...cle.com,
        aravind.ramesh@....com, joshi.k@...sung.com, niklas.cassel@....com,
        hch@....de, osandov@...com, martin.petersen@...cle.com,
        linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [blktrace]  c055908abe:
 WARNING:at_kernel/trace/trace.c:#create_trace_option_files


Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: c055908abe0d7f6a5bd4f602d0c825ae20daefc8 ("[RFC PATCH 33/39] blktrace: add blkext tracer")
url: https://github.com/0day-ci/linux/commits/Chaitanya-Kulkarni/blktrace-add-block-trace-extension-support/20210225-151637
base: https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-block.git for-next

in testcase: trinity
version: trinity-static-i386-x86_64-f93256fb_2019-08-28
with following parameters:

	runtime: 300s

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):


+-------------------------------------------------------------------------+------------+------------+
|                                                                         | 503e031aef | c055908abe |
+-------------------------------------------------------------------------+------------+------------+
| WARNING:at_kernel/trace/trace.c:#create_trace_option_files              | 0          | 5          |
| EIP:create_trace_option_files                                           | 0          | 5          |
+-------------------------------------------------------------------------+------------+------------+


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>


[   20.216017] WARNING: CPU: 0 PID: 1 at kernel/trace/trace.c:8370 create_trace_option_files (kbuild/src/consumer/kernel/trace/trace.c:8370 (discriminator 1)) 
[   20.218480] Modules linked in:
[   20.219395] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.11.0-09341-gc055908abe0d #1
[   20.221182] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[   20.224540] EIP: create_trace_option_files (kbuild/src/consumer/kernel/trace/trace.c:8370 (discriminator 1)) 
[ 20.225816] Code: d5 01 83 15 2c b7 08 d5 00 83 c0 01 39 c8 0f 84 c7 00 00 00 8b 14 c7 39 72 44 75 df 83 05 10 b7 08 d5 01 83 15 14 b7 08 d5 00 <0f> 0b 83 05 18 b7 08 d5 01 83 15 1c b7 08 d5 00 83 05 20 b7 08 d5
All code
========
   0:	d5                   	(bad)  
   1:	01 83 15 2c b7 08    	add    %eax,0x8b72c15(%rbx)
   7:	d5                   	(bad)  
   8:	00 83 c0 01 39 c8    	add    %al,-0x37c6fe40(%rbx)
   e:	0f 84 c7 00 00 00    	je     0xdb
  14:	8b 14 c7             	mov    (%rdi,%rax,8),%edx
  17:	39 72 44             	cmp    %esi,0x44(%rdx)
  1a:	75 df                	jne    0xfffffffffffffffb
  1c:	83 05 10 b7 08 d5 01 	addl   $0x1,-0x2af748f0(%rip)        # 0xffffffffd508b733
  23:	83 15 14 b7 08 d5 00 	adcl   $0x0,-0x2af748ec(%rip)        # 0xffffffffd508b73e
  2a:*	0f 0b                	ud2    		<-- trapping instruction
  2c:	83 05 18 b7 08 d5 01 	addl   $0x1,-0x2af748e8(%rip)        # 0xffffffffd508b74b
  33:	83 15 1c b7 08 d5 00 	adcl   $0x0,-0x2af748e4(%rip)        # 0xffffffffd508b756
  3a:	83                   	.byte 0x83
  3b:	05 20 b7 08 d5       	add    $0xd508b720,%eax

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2    
   2:	83 05 18 b7 08 d5 01 	addl   $0x1,-0x2af748e8(%rip)        # 0xffffffffd508b721
   9:	83 15 1c b7 08 d5 00 	adcl   $0x0,-0x2af748e4(%rip)        # 0xffffffffd508b72c
  10:	83                   	.byte 0x83
  11:	05 20 b7 08 d5       	add    $0xd508b720,%eax
[   20.231135] EAX: 00000008 EBX: d3c49fc0 ECX: 00000009 EDX: d43fd620
[   20.232662] ESI: d3c49f9c EDI: c1f63698 EBP: c1c73f0c ESP: c1c73ef0
[   20.234528] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246
[   20.236313] CR0: 80050033 CR2: 00000000 CR3: 14949000 CR4: 000006d0
[   20.238351] Call Trace:
[   20.239241] register_tracer (kbuild/src/consumer/kernel/trace/trace.c:5908 kbuild/src/consumer/kernel/trace/trace.c:2107) 
[   20.240372] ? init_graph_trace (kbuild/src/consumer/kernel/trace/blktrace.c:2526) 
[   20.241493] init_blk_tracer (kbuild/src/consumer/kernel/trace/blktrace.c:2545) 
[   20.242804] do_one_initcall (kbuild/src/consumer/init/main.c:1223) 
[   20.243862] ? rcu_read_lock_sched_held (kbuild/src/consumer/include/linux/lockdep.h:278 kbuild/src/consumer/kernel/rcu/update.c:125) 
[   20.245103] ? trace_initcall_level (kbuild/src/consumer/include/trace/events/initcall.h:10 (discriminator 67)) 
[   20.246611] kernel_init_freeable (kbuild/src/consumer/init/main.c:1295 kbuild/src/consumer/init/main.c:1312 kbuild/src/consumer/init/main.c:1332 kbuild/src/consumer/init/main.c:1533) 
[   20.247834] ? rest_init (kbuild/src/consumer/init/main.c:1418) 
[   20.248901] kernel_init (kbuild/src/consumer/init/main.c:1423) 
[   20.249850] ret_from_fork (kbuild/src/consumer/arch/x86/entry/entry_32.S:856) 
[   20.251381] irq event stamp: 4343293
[   20.252533] hardirqs last enabled at (4343301): console_unlock (kbuild/src/consumer/kernel/printk/printk.c:2605 (discriminator 1)) 
[   20.255052] hardirqs last disabled at (4343310): console_unlock (kbuild/src/consumer/kernel/printk/printk.c:2520 (discriminator 1)) 
[   20.257109] softirqs last enabled at (4342794): __do_softirq (kbuild/src/consumer/arch/x86/include/asm/preempt.h:27 kbuild/src/consumer/kernel/softirq.c:371) 
[   20.259404] softirqs last disabled at (4342789): call_on_stack (kbuild/src/consumer/arch/x86/kernel/irq_32.c:59) 
[   20.261358] ---[ end trace bc5f5cafed183c31 ]---
[   20.269773] Initialise system trusted keyrings
[   20.271532] Key type blacklist registered
[   20.286648] workingset: timestamp_bits=14 max_order=20 bucket_order=6
[   20.434198] zbud: loaded
[   20.453926] DLM installed
[   20.490173] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[   20.819671] FS-Cache: Netfs 'nfs' registered for caching
[   21.012308] NFS: Registering the id_resolver key type
[   21.013624] Key type id_resolver registered
[   21.014716] Key type id_legacy registered
[   21.016704] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[   21.018638] Installing knfsd (copyright (C) 1996 okir@...ad.swb.de).
[   21.031359] utf8_selftest: All 154 tests passed
[   21.362307] _warn_unseeded_randomness: 252 callbacks suppressed
[   21.362324] random: get_random_u32 called from allocate_slab+0x13e/0x5a0 with crng_init=0 
[   21.365896] random: get_random_u32 called from copy_process+0x243/0x1900 with crng_init=0 
[   21.372082] random: get_random_u32 called from allocate_slab+0x13e/0x5a0 with crng_init=0 
[   22.826228] FS-Cache: Netfs 'cifs' registered for caching
[   22.827594] _warn_unseeded_randomness: 1 callbacks suppressed
[   22.827600] random: get_random_u32 called from __kmem_cache_create+0x26/0x3e0 with crng_init=0 
[   22.827622] random: get_random_u32 called from cache_random_seq_create+0x7c/0x140 with crng_init=0 
[   22.827831] random: get_random_u32 called from allocate_slab+0x13e/0x5a0 with crng_init=0 
[   22.840557] Key type cifs.spnego registered
[   22.842144] Key type cifs.idmap registered
[   22.844204] ntfs: driver 2.1.32 [Flags: R/W DEBUG].
[   22.849844] efs: 1.0a - http://aeschi.ch.eu.org/efs/
[   22.863659] romfs: ROMFS MTD (C) 2007 Red Hat, Inc.
[   22.866664] QNX4 filesystem 0.2.3 registered.
[   22.868611] qnx6: QNX6 filesystem 1.0.0 registered.
[   22.875183] fuse: init (API version 7.33)
[   22.882906] orangefs_debugfs_init: called with debug mask: :none: :0:
[   22.885270] orangefs_init: module version upstream loaded
[   22.888998] JFS: nTxBlock = 8192, nTxLock = 65536
[   23.267140] SGI XFS with ACLs, security attributes, realtime, scrub, repair, quota, fatal assert, debug enabled
[   23.390479] 9p: Installing v9fs 9p2000 file system support
[   23.392589] FS-Cache: Netfs '9p' registered for caching
[   23.396857] NILFS version 2 loaded
[   23.398093] befs: version: 0.9.3
[   23.408701] ocfs2: Registered cluster interface o2cb
[   23.410932] ocfs2: Registered cluster interface user
[   23.730184] OCFS2 User DLM kernel interface loaded
[   24.058434] _warn_unseeded_randomness: 236 callbacks suppressed
[   24.058447] random: get_random_u32 called from __kmem_cache_create+0x26/0x3e0 with crng_init=0 
[   24.058479] random: get_random_u32 called from cache_random_seq_create+0x7c/0x140 with crng_init=0 
[   24.058652] random: get_random_u32 called from allocate_slab+0x13e/0x5a0 with crng_init=0 
[   24.073256] gfs2: GFS2 installed
[   24.097912] FS-Cache: Netfs 'ceph' registered for caching
[   24.099396] ceph: loaded (mds proto 32)
[   24.105556] Smack: Registering netfilter hooks
[   24.107358] integrity: Platform Keyring initialized
[   24.108531] Allocating IMA blacklist keyring.
[   24.403512] NET: Registered protocol family 38
[   24.405457] xor: measuring software checksum speed
[   24.408022]    pIII_sse        :  7748 MB/sec
[   24.410377]    prefetch64-sse  :  9042 MB/sec
[   24.411478] xor: using function: prefetch64-sse (9042 MB/sec)
[   24.412923] async_tx: api initialized (async)
[   24.414256] Key type asymmetric registered
[   24.415613] Asymmetric key parser 'x509' registered
[   24.416969] Asymmetric key parser 'pkcs8' registered
[   24.418337] Key type pkcs7_test registered
[   24.419419] Asymmetric key parser 'tpm_parser' registered
[   24.420996] bounce: pool size: 64 pages
[   24.423333] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 235)
[   24.425884] io scheduler mq-deadline registered
[   24.427055] io scheduler kyber registered
[   24.429756] io scheduler bfq registered
[   24.833213] String selftests succeeded
[   24.834768] test_printf: loaded.
[   24.835938] test_printf: crng possibly not yet initialized. plain 'p' buffer contains "(ptrval)"
[   24.836004] test_printf: crng possibly not yet initialized. plain 'p' buffer contains "(ptrval)"
[   24.839089] test_printf: crng possibly not yet initialized. plain 'p' buffer contains "(ptrval)"
[   24.849973] test_printf: all 388 tests passed
[   24.852954] test_bitmap: loaded.
[   24.854346] test_bitmap: parselist: 14: input is '0-2047:128/256' OK, Time: 2067
[   24.860960] test_bitmap: all 1679 tests passed
[   24.862251] test_strscpy: loaded.
[   24.863216] test_strscpy: all 32 tests passed
[   24.870583] test_stackinit: u8_zero ok
[   24.871767] test_stackinit: u16_zero ok
[   24.872830] test_stackinit: u32_zero ok
[   24.873980] test_stackinit: u64_zero ok
[   24.874903] test_stackinit: char_array_zero ok
[   24.875902] test_stackinit: small_hole_zero ok
[   24.876904] test_stackinit: big_hole_zero ok
[   24.878022] test_stackinit: trailing_hole_zero ok
[   24.879097] test_stackinit: packed_zero ok
[   24.880030] test_stackinit: small_hole_dynamic_partial ok
[   24.881209] test_stackinit: big_hole_dynamic_partial ok
[   24.882487] test_stackinit: trailing_hole_dynamic_partial ok
[   24.883687] test_stackinit: packed_dynamic_partial ok
[   24.884812] test_stackinit: small_hole_static_partial ok
[   24.886164] test_stackinit: big_hole_static_partial ok
[   24.887342] test_stackinit: trailing_hole_static_partial ok
[   24.888571] test_stackinit: packed_static_partial ok
[   24.889676] test_stackinit: small_hole_static_all FAIL (uninit bytes: 3)
[   24.891127] test_stackinit: big_hole_static_all FAIL (uninit bytes: 61)
[   24.892513] test_stackinit: trailing_hole_static_all FAIL (uninit bytes: 3)
[   24.894015] test_stackinit: packed_static_all ok
[   24.895117] test_stackinit: small_hole_dynamic_all FAIL (uninit bytes: 3)


To reproduce:

        # build kernel
	cd linux
	cp config-5.11.0-09341-gc055908abe0d .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



Thanks,
Oliver Sang


View attachment "config-5.11.0-09341-gc055908abe0d" of type "text/plain" (267207 bytes)

View attachment "job-script" of type "text/plain" (4201 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (42024 bytes)

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