linux-kernel - Oops in ring_buffer_alloc_read

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Date:	Tue, 18 Jun 2013 20:08:55 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	fengguang.wu@...el.com, Steven Rostedt <rostedt@...dmis.org>
Cc:	Vaibhav Nagarnaik <vnagarnaik@...gle.com>,
	linux-kernel@...r.kernel.org
Subject: Oops in ring_buffer_alloc_read_page()

Greetings,

I got the below oops in upstream. It's a hard to reproduce one and at
least is as old as v3.0.

[   36.774933] IP: [<7916a472>] ring_buffer_alloc_read_page+0x66/0x82
[   36.776024] *pde = 0e3e1067 *pte = 061e7260 
[   36.776024] Oops: 0002 [#1] SMP DEBUG_PAGEALLOC
[   36.776024] CPU: 0 PID: 44 Comm: rb_consumer Not tainted 3.10.0-rc4-00292-gbed1059 #29
[   36.776024] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
[   36.776024] task: 7e3a5000 ti: 7e3a8000 task.ti: 7e3a8000
[   36.776024] EIP: 0060:[<7916a472>] EFLAGS: 00010246 CPU: 0
[   36.776024] EIP is at ring_buffer_alloc_read_page+0x66/0x82
[   36.776024] EAX: 7e1e7000 EBX: 0000feaf ECX: 00000000 EDX: 00000000
[   36.776024] ESI: 7e3a5000 EDI: 00000000 EBP: 7e3a9ed0 ESP: 7e3a9ecc
[   36.776024]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[   36.776024] CR0: 8005003b CR2: 7e1e7008 CR3: 05beb000 CR4: 00000690
[   36.776024] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[   36.776024] DR6: ffff0ff0 DR7: 00000400
[   36.776024] Stack:
[   36.776024]  00000000 7e3a9f00 7916abae 00000001 00000001 7e1e7000 ffffffff 00000ff0
[   36.776024]  00000ff0 00000000 00000000 7e3a5000 00000000 7e3a9f30 7916b38c 00000000
[   36.776024]  003a9f14 7e3a5000 00000000 00000000 0670d10e 00000004 00000000 7916b191
[   36.776024] Call Trace:
[   36.776024]  [<7916abae>] read_page+0x25/0x608
[   36.776024]  [<7916b38c>] ring_buffer_consumer_thread+0x1fb/0x549

git bisect  bad c1be5a5b1b355d40e6cf79cc979eb66dafa24ad1  # 12:28      0-  Linux 3.9
git bisect  bad 19f949f52599ba7c3f67a5897ac6be14bfcb1200  # 12:28      0-  Linux 3.8
git bisect  bad 29594404d7fe73cd80eaa4ee8c43dcc53970c60e  # 12:28      0-  Linux 3.7
git bisect  bad a0d271cbfed1dd50278c6b06bead3d00ba0a88f9  # 12:29      0-  Linux 3.6
git bisect  bad 28a33cbc24e4256c143dce96c7d93bf423229f92  # 12:31    179-  Linux 3.5
git bisect  bad 76e10d158efb6d4516018846f60c2ab5501900bc  # 20:58   3174-  Linux 3.4
git bisect  bad c16fa4f2ad19908a47c63d8fa436a1178438c7e7  # 15:59  21714-  Linux 3.3
git bisect  bad 805a6af8dba5dfdd35ec35dc52ec0122400b2610  # 16:20   2591-  Linux 3.2
git bisect  bad c3b92c8787367a8bb53d57d9789b558f1295cc96  # 20:15   6321-  Linux 3.1
git bisect  bad 02f8c6aee8df3cdc935e9bdd4f2d020306035dbe  # 05:29  11960-  Linux 3.0
git bisect  bad 8177a9d79c0e942dcac3312f15585d0344d505a5  # 06:23    493-  lseek(fd, n, SEEK_END) does *not* go to eof - n

Thanks,
Fengguang

View attachment "dmesg-kvm-inn-52676-20130610071953-3.10.0-rc4-00292-gbed1059-29" of type "text/plain" (48541 bytes)

Download attachment "bisect-bed10590f06e41b1a806dd3590bd7242d11f6b1d-i386-randconfig-s04-0605-ring_buffer_alloc_read_page-57413.log" of type "application/octet-stream" (65242 bytes)

View attachment ".config-bisect" of type "text/plain" (64628 bytes)