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Date: Tue, 11 Apr 2017 09:47:29 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Sascha Hauer <s.hauer@...gutronix.de>
Cc: Brian Norris <computersforpeace@...il.com>,
Uwe Kleine-König
<u.kleine-koenig@...gutronix.de>,
LKML <linux-kernel@...r.kernel.org>,
Linus Torvalds <torvalds@...ux-foundation.org>, lkp@...org
Subject: [lkp-robot] [mtd] 42e9401bd1:
WARNING:at_kernel/locking/lockdep.c:#__bfs
FYI, we noticed the following commit:
commit: 42e9401bd1467d22c4dc4d2c637347b874e6a80b ("mtd: Add partition device node to mtd partition devices")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: trinity
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-x86_64 -enable-kvm -m 512M
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+--------------------------------------------------------------------------+------------+------------+
| | 89a0d9a9f1 | 42e9401bd1 |
+--------------------------------------------------------------------------+------------+------------+
| boot_successes | 0 | 0 |
| boot_failures | 56 | 52 |
| WARNING:at_drivers/gpu/drm/drm_mode_config.c:#drm_mode_config_cleanup | 56 | 52 |
| BUG:unable_to_handle_kernel | 1 | 39 |
| Oops:#[##] | 1 | 39 |
| Kernel_panic-not_syncing:Fatal_exception | 1 | 39 |
| WARNING:at_kernel/locking/lockdep.c:#__bfs | 0 | 39 |
| BUG:sleeping_function_called_from_invalid_context_at_arch/x86/mm/fault.c | 0 | 39 |
| WARNING:at_kernel/locking/lockdep.c:#__lock_acquire | 0 | 11 |
| BUG:spinlock_lockup_suspected_on_CPU | 0 | 11 |
+--------------------------------------------------------------------------+------------+------------+
[ 7.397382] WARNING: CPU: 0 PID: 334 at kernel/locking/lockdep.c:949 __bfs+0x157/0x250
[ 7.399205] CPU: 0 PID: 334 Comm: sync Tainted: G W 4.10.0-rc6-00027-g42e9401 #1
[ 7.400332] Call Trace:
[ 7.400708] dump_stack+0x86/0xc1
[ 7.401145] __warn+0xbb/0xe0
[ 7.401528] ? noop_count+0x10/0x10
[ 7.401973] warn_slowpath_null+0x18/0x20
[ 7.402498] __bfs+0x157/0x250
[ 7.402889] find_usage_backwards+0x63/0x70
[ 7.403445] check_usage_backwards+0xa4/0xe0
[ 7.403982] mark_lock+0x377/0x570
[ 7.404477] ? check_usage_forwards+0xf0/0xf0
[ 7.405111] __lock_acquire+0x2f6/0x820
[ 7.405657] lock_acquire+0x1a4/0x1f0
[ 7.406114] ? iterate_supers+0x67/0xe0
[ 7.406606] ? sync_fs_one_sb+0x20/0x20
[ 7.407153] down_read+0x42/0x70
[ 7.407575] ? iterate_supers+0x67/0xe0
[ 7.408063] iterate_supers+0x67/0xe0
[ 7.408606] sys_sync+0x30/0x60
[ 7.409017] entry_SYSCALL_64_fastpath+0x1f/0xc2
[ 7.409625] RIP: 0033:0x7fd8df2b97c7
[ 7.410081] RSP: 002b:00007ffec40aaec8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a2
[ 7.411085] RAX: ffffffffffffffda RBX: 0000000000000089 RCX: 00007fd8df2b97c7
[ 7.412036] RDX: 0000000000000004 RSI: 00007ffec40ab058 RDI: 0000000000000001
[ 7.413092] RBP: 00007ffec40abc21 R08: 0000000000000000 R09: 000000000000000b
[ 7.413992] R10: 000000000000081d R11: 0000000000000202 R12: 0000000000000369
[ 7.414895] R13: 0000000000000089 R14: 0000000000000001 R15: 0000000000000000
[ 7.415844] ---[ end trace 047797e79d0ae057 ]---
To reproduce:
git clone https://github.com/01org/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Xiaolong
View attachment "config-4.10.0-rc6-00027-g42e9401b" of type "text/plain" (94375 bytes)
Download attachment "dmesg.xz" of type "application/octet-stream" (19064 bytes)
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