linux-kernel - [lkp] [[WIP] x86, entry] d3b7f86737f: WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:3561 check

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Date:	Tue, 02 Jun 2015 16:49:05 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Andy Lutomirski <luto@...nel.org>
CC:	LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [lkp] [[WIP] x86, entry] d3b7f86737f: WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:3561
 check_flags+0xc9/0x1b0()

FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/entry
commit d3b7f86737f7fb308daa3329521cf83f0327eab8 ("[WIP] x86, entry: Rewrite the syscall exit work handlers")


+----------------------------------------------------+------------+------------+
|                                                    | a4df5aa9c7 | d3b7f86737 |
+----------------------------------------------------+------------+------------+
| boot_successes                                     | 37         | 0          |
| boot_failures                                      | 0          | 10         |
| WARNING:at_kernel/locking/lockdep.c:#check_flags() | 0          | 10         |
| backtrace:__close_fd                               | 0          | 9          |
| backtrace:SyS_close                                | 0          | 9          |
| backtrace:might_fault                              | 0          | 1          |
| backtrace:SyS_rt_sigaction                         | 0          | 1          |
+----------------------------------------------------+------------+------------+


[    6.568336] debug: unmapping init [mem 0xffff880001897000-0xffff8800019fffff]
[    6.569146] debug: unmapping init [mem 0xffff880001e54000-0xffff880001ffffff]
[    6.571376] ------------[ cut here ]------------
[    6.571861] WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:3561 check_flags+0xc9/0x1b0()
[    6.572010] DEBUG_LOCKS_WARN_ON(!current->hardirqs_enabled)
[    6.572010] CPU: 0 PID: 1 Comm: init Not tainted 4.1.0-rc5-wl-ath-02675-g49a735a #1
[    6.572010] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[    6.572010]  0000000000000009 ffff88000005fdc8 ffffffff81887053 ffff88000005fe08
[    6.572010]  ffffffff810e7c0d 0000000000000010 ffffffff8110fb8f 0000000000000296
[    6.572010]  ffff880000061c18 0000000000000000 0000000000000000 ffff88000005fe68
[    6.572010] Call Trace:
[    6.572010]  [<ffffffff81887053>] dump_stack+0x19/0x1b
[    6.572010]  [<ffffffff810e7c0d>] warn_slowpath_common+0x8c/0xa6
[    6.572010]  [<ffffffff8110fb8f>] ? check_flags+0xc9/0x1b0
[    6.572010]  [<ffffffff810e7c82>] warn_slowpath_fmt+0x41/0x43
[    6.572010]  [<ffffffff8110fb8f>] check_flags+0xc9/0x1b0
[    6.572010]  [<ffffffff811130e2>] lock_acquire+0x52/0xbf
[    6.572010]  [<ffffffff81890b42>] _raw_spin_lock+0x2d/0x3d
[    6.572010]  [<ffffffff811a9814>] ? __close_fd+0x20/0xd8
[    6.572010]  [<ffffffff811a9814>] __close_fd+0x20/0xd8
[    6.572010]  [<ffffffff8118ed05>] SyS_close+0x1d/0x46
[    6.572010]  [<ffffffff818914af>] system_call_fastpath+0x12/0x76
[    6.572010] ---[ end trace 8f6a2cf2bf333e31 ]---
[    6.572010] possible reason: unannotated irqs-on.



Thanks,
Ying Huang
-------------------------------------
lkp@...ists.intel.com
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