linux-kernel - Re: linux-next: Tree for Feb 23 [ perf: NULL pointer dereference perf_init

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Message-ID: <CA+icZUV=e_5qvEs-KyphN7=skmr1-kSSqbiVT5eFsfXbUaT9qQ@mail.gmail.com>
Date:	Mon, 25 Feb 2013 14:44:29 +0100
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	x86@...nel.org, Ingo Molnar <mingo@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: linux-next: Tree for Feb 23 [ perf: NULL pointer dereference
 perf_init_event() ]

On Mon, Feb 25, 2013 at 6:00 AM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> Hi all,
>
> Please do not add any work destined for v3.10 to your -next included
> branches until after Linus has release v3.9-rc1.
>
> Changes since 20130222:
>
> The metag tree gained a conflict against Linus' tree.
>
> The kbuild tree gained a build failure so I used the version from
> next-20130222.
>
> The drm tree still has its build failure for which I applied a patch.
>
> The watchdog tree gained a conflict against Linus' tree.
>
> The akpm tree gained a conflict against the vfs tree and lost lots of
> patches that turned up elsewhere.
>
> ----------------------------------------------------------------------------
>

With today's Linux-Next I see multiple call-traces pointing to perf
issues (excerpt, for full dmesg see attachments):

[    0.093651] Call Trace:
[    0.093656]  [<ffffffff8112a808>] perf_event_alloc+0x358/0x490
[    0.093661]  [<ffffffff810ec230>] ? touch_nmi_watchdog+0x80/0x80
[    0.093666]  [<ffffffff8112ac6e>] perf_event_create_kernel_counter+0x2e/0xe0
[    0.093670]  [<ffffffff810ec3ed>] watchdog_enable+0xfd/0x1e0
[    0.093676]  [<ffffffff81087a3c>] smpboot_thread_fn+0x9c/0x170
[    0.093681]  [<ffffffff810879a0>] ? lg_global_lock+0x70/0x70
[    0.093685]  [<ffffffff8107fb80>] kthread+0xc0/0xd0
[    0.093689]  [<ffffffff8107fac0>] ? flush_kthread_worker+0xb0/0xb0
[    0.093694]  [<ffffffff816cc56c>] ret_from_fork+0x7c/0xb0
[    0.093698]  [<ffffffff8107fac0>] ? flush_kthread_worker+0xb0/0xb0
[    0.093700] Code: 54 49 89 fc 48 c7 c7 c0 6d f5 81 53 48 83 ec 18
e8 e4 a5 f5 ff 41 8b b4 24 a0 00 00 00 41 89 c5 48 8b 05 a2 c9 e2 00
89 f2 30 d2 <3b> 10 74 4a 48 c7 c7 80 6d f5 81 e8 ce ab 22 00 48 89 c3
48 85
[    0.093736] RIP  [<ffffffff8112a3e2>] perf_init_event+0x32/0x100
[    0.093740]  RSP <ffff880119b93d58>
[    0.093742] CR2: 0000000000000000
[    0.093746] ---[ end trace 941ac4690a5bae9e ]---
[    0.104659] Disabled fast string operations
[    0.106781] Brought up 4 CPUs
[    0.106785] BUG: unable to handle kernel NULL pointer dereference
at           (null)
[    0.106790] IP: [<ffffffff8112a3e2>] perf_init_event+0x32/0x100
[    0.106791] PGD 0
[    0.106794] Oops: 0000 [#4] SMP
[    0.106795] Modules linked in:
[    0.106798] CPU 3
[    0.106798] Pid: 22, comm: watchdog/3 Tainted: G      D
3.8.0-next20130225-1-iniza-small #1 SAMSUNG ELECTRONICS CO., LTD.
530U3BI/530U4BI/530U4BH/530U3BI/530U4BI/530U4BH
[    0.106801] RIP: 0010:[<ffffffff8112a3e2>]  [<ffffffff8112a3e2>]
perf_init_event+0x32/0x100
...

Regards,
- Sedat -

View attachment "dmesg_3.8.0-next20130225-1-iniza-small.txt" of type "text/plain" (66350 bytes)

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