linux-kernel - [x86/xsaves] 4d90fc49c73: WARNING: CPU: 3 PID: 168 at arch/x86/kernel/xsave.c:306 save_xstate

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Date:	Sat, 9 May 2015 20:58:07 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Dave Hansen <dave.hansen@...el.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Fenghua Yu <fenghua.yu@...el.com>, LKP <lkp@...org>
Subject: [x86/xsaves] 4d90fc49c73: WARNING: CPU: 3 PID: 168 at
 arch/x86/kernel/xsave.c:306 save_xstate_sig+0x3a7/0x3d0()


Hi Dave,

Here is another warning bisected to the same commit.

https://github.com/hansendc/linux.git github-mpx
commit 4d90fc49c73730c09d7afd515f9c4e08d30229bd ("x86/xsaves: Define and use user_xstate_size for  xstate size in signal context")

+-----------------------------------------------------------+------------+------------+
|                                                           | 1a745816a2 | 4d90fc49c7 |
+-----------------------------------------------------------+------------+------------+
| boot_successes                                            | 10         | 10         |
| boot_failures                                             | 12         | 12         |
| IP-Config:Auto-configuration_of_network_failed            | 12         |            |
| BUG:kernel_test_hang                                      | 0          | 10         |
| Kernel_panic-not_syncing:Attempted_to_kill_init!exitcode= | 0          | 2          |
| backtrace:do_group_exit                                   | 0          | 2          |
| backtrace:SyS_exit_group                                  | 0          | 2          |
+-----------------------------------------------------------+------------+------------+


[    6.161064] systemd-journald[162]: Compressed data object 997 -> 624
[    6.185412] systemd-journald[162]: systemd-journald running as pid 162
[    6.209816] ------------[ cut here ]------------
[    6.210858] WARNING: CPU: 3 PID: 168 at arch/x86/kernel/xsave.c:306 save_xstate_sig+0x3a7/0x3d0()
[    6.210860] mismatched xstate sizes
[    6.210860] Modules linked in:
[    6.210864] CPU: 3 PID: 168 Comm: quotaon.sh Not tainted 4.1.0-rc2-00575-g93d3b01 #72
[    6.210870] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[    6.210876]  0000000000000132 ffff88007fb9fc88 ffffffff81d1d915 dffffc0000000000
[    6.210880]  ffff88007fb9fce8 ffff88007fb9fcd8 ffffffff810db219 0000000000000011
[    6.210885]  ffffffff81014647 ffff88007fb9fcc8 00007ffdfc90e140 00007ffdfc90e140
[    6.210886] Call Trace:
[    6.210893]  [<ffffffff81d1d915>] dump_stack+0x4c/0x65
[    6.210900]  [<ffffffff810db219>] warn_slowpath_common+0x99/0xe0
[    6.210905]  [<ffffffff81014647>] ? save_xstate_sig+0x3a7/0x3d0
[    6.210910]  [<ffffffff810db2a1>] warn_slowpath_fmt+0x41/0x50
[    6.210914]  [<ffffffff81014647>] save_xstate_sig+0x3a7/0x3d0
[    6.210920]  [<ffffffff810ed41c>] ? get_signal+0x79c/0x8c0
[    6.210925]  [<ffffffff81004be9>] do_signal+0xb39/0xbf0
[    6.210932]  [<ffffffff8111451a>] ? account_user_time+0xba/0xe0
[    6.210937]  [<ffffffff81114d59>] ? vtime_account_user+0x69/0x90
[    6.210941]  [<ffffffff81004d28>] do_notify_resume+0x88/0xc0
[    6.210946]  [<ffffffff81d27dbc>] int_signal+0x12/0x17
[    6.210947] ---[ end trace 80de8b14ed079e1e ]---
[    6.292421] systemd-udevd[181]: starting version 215

Attached the dmesg and also parent commit's dmesg.

Thanks,
Fengguang Wu

View attachment "config-4.1.0-rc2-00025-g4d90fc4" of type "text/plain" (94291 bytes)

View attachment ".dmesg" of type "text/plain" (122367 bytes)

View attachment "dmesg-parent" of type "text/plain" (121490 bytes)