linux-kernel - [cgroup_rmdir] BUG: unable to handle kernel paging request at ffff880210af6000

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Date:   Tue, 7 Nov 2017 18:26:02 +0800
From:   Fengguang Wu <fengguang.wu@...el.com>
To:     Tejun Heo <tj@...nel.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Zefan Li <lizefan@...wei.com>, Roman Gushchin <guro@...com>,
        Waiman Long <longman@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-kernel@...r.kernel.org
Subject: [cgroup_rmdir] BUG: unable to handle kernel paging request at
 ffff880210af6000

Hello,

FYI this happens in v4.14-rc8 -- it's not necessarily a new bug.

[  183.936488] systemd-journald[115]: Failed to open /proc/sys/kernel/hostname: No such file or directory
          Mounting RPC Pipe File System...
          Starting Create list of required st... nodes for the current kernel...
          Mounting Debug File System...
See 'systemctl status systemd-journald.service' for details.
[  186.238181] BUG: unable to handle kernel paging request at ffff880210af6000
[  186.257107] IP: slob_free+0x1c4/0x276
[  186.266992] PGD 38c6067 P4D 38c6067 PUD 38c9067 PMD 23f077067 PTE 8000000210af6060
[  186.287018] Oops: 0000 [#1] DEBUG_PAGEALLOC
[  186.298199] Modules linked in:
[  186.306655] CPU: 0 PID: 1 Comm: systemd Not tainted 4.14.0-rc8 #136
[  186.323383] task: ffff88023da70000 task.stack: ffffc90000008000
[  186.339101] RIP: 0010:slob_free+0x1c4/0x276
[  186.350307] RSP: 0018:ffffc9000000bd70 EFLAGS: 00010046
[  186.364370] RAX: ffff880210af5ffe RBX: ffff880210af5ff0 RCX: 0000000000001420
[  186.383035] RDX: ffff880210af5000 RSI: ffffffff81e35608 RDI: ffff880210af5f08
[  186.401667] RBP: ffff880210af5ffe R08: 0000000000000001 R09: 0000000000000001
[  186.420365] R10: ffffc9000000bcc8 R11: 000000002a1a0f28 R12: ffff880210af5f08
[  186.437647] R13: 0000000000000007 R14: 0000000000000007 R15: 0000000000000007
[  186.455399] FS:  00007fc9d537d900(0000) GS:ffffffff81c2e000(0000) knlGS:0000000000000000
[  186.476759] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  186.491952] CR2: ffff880210af6000 CR3: 000000021095d000 CR4: 00000000000006b0
[  186.510588] Call Trace:
[  186.517908]  kernfs_put+0xd4/0x1d6
[  186.527178]  __kernfs_remove+0x2d1/0x306
[  186.537741]  kernfs_remove+0x24/0x31
[  186.547499]  cgroup_destroy_locked+0x186/0x20f
[  186.559461]  cgroup_rmdir+0x36/0x16e
[  186.569184]  kernfs_iop_rmdir+0x67/0x89
[  186.579552]  vfs_rmdir+0x8c/0xee
[  186.588423]  do_rmdir+0x10f/0x19d
[  186.597529]  entry_SYSCALL_64_fastpath+0x1f/0xbd
[  186.611108] RIP: 0033:0x7fc9d395a857
[  186.620703] RSP: 002b:00007ffccf7933c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054
[  186.640597] RAX: ffffffffffffffda RBX: 0000000000000046 RCX: 00007fc9d395a857
[  186.659306] RDX: 00007fc9d3c1ab78 RSI: 0000000000000000 RDI: 00005632485bb960
[  186.678134] RBP: fffffffffffffe10 R08: 0000000000000100 R09: 000056324862c380
[  186.697215] R10: 0000000000000100 R11: 0000000000000202 R12: 0000000000000000
[  186.715919] R13: 00000000ffffffff R14: 00007ffccf7932a0 R15: 0000000000000000
[  186.734777] Code: 89 ec e8 d1 f5 ff ff 48 39 c3 48 89 c5 77 ed 4c 89 e7 e8 c1 f5 ff ff a9 ff 0f 00 00 74 31 49 0f bf c5 48 8d 04 43 48 39 e8 75 24 <8b> 45 00 41 be 01 00 00 00 48 89 ef 66 85 c0 44 0f 4f f0 45 01 
[  186.785065] RIP: slob_free+0x1c4/0x276 RSP: ffffc9000000bd70
[  186.800042] CR2: ffff880210af6000
[  186.808986] ---[ end trace 1a1c6afc0e9b5ec9 ]---
[  186.821358] Kernel panic - not syncing: Fatal exception

Attached the full dmesg and kconfig.

Thanks,
Fengguang

View attachment "dmesg-vm-lkp-wsx03-8G-3:20171106115200:x86_64-randconfig-n0-11060914:4.14.0-rc8:136" of type "text/plain" (66010 bytes)

View attachment ".config" of type "text/plain" (110228 bytes)