From: Vince Weaver <vincent.weaver@maine.edu>
To: linux-kernel@vger.kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>
Subject: perf: fuzzer WARNING event_function_local.constprop
Date: Fri, 12 Aug 2016 12:59:11 -0400 (EDT) [thread overview]
Message-ID: <alpine.DEB.2.20.1608121255150.13657@macbook-air> (raw)
Got this while fuzzing on the Haswell machine. It's relatively repeatable
if anyone wants me to chase it down more.
It maps to
int ret = event_function(&efs);
WARN_ON_ONCE(ret);
In event_function_local()
[166817.446302] ------------[ cut here ]------------
[166817.451347] WARNING: CPU: 1 PID: 0 at kernel/events/core.c:254 event_function_local.constprop.106+0x4c/0x50
[166817.535510] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.8.0-rc1+ #187
[166817.542500] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014
[166817.550535] 0000000000000000 ffff88011ea43ca8 ffffffff81437641 0000000000000000
[166817.558676] 0000000000000000 ffff88011ea43ce8 ffffffff81076bab 000000fe8116864d
[166817.566785] 0000000000000002 0000000000014000 ffff8800ac3ae3e8 ffff8800ac3ae000
[166817.574918] Call Trace:
[166817.577654] <IRQ> [<ffffffff81437641>] dump_stack+0x63/0x82
[166817.583957] [<ffffffff81076bab>] __warn+0xcb/0xf0
[166817.589185] [<ffffffff81076c9d>] warn_slowpath_null+0x1d/0x20
[166817.595550] [<ffffffff8116bbac>] event_function_local.constprop.106+0x4c/0x50
[166817.603398] [<ffffffff8116e3a0>] ? task_ctx_sched_out+0x50/0x50
[166817.609948] [<ffffffff81174c71>] perf_pending_event+0xd1/0xe0
[166817.616291] [<ffffffff8115dea8>] irq_work_run_list+0x48/0x70
[166817.622566] [<ffffffff8115dee8>] irq_work_run+0x18/0x40
[166817.628357] [<ffffffff81032cee>] smp_irq_work_interrupt+0x2e/0x40
[166817.635090] [<ffffffff81723a02>] irq_work_interrupt+0x82/0x90
[166817.641445] [<ffffffff81721b81>] ? _raw_spin_unlock_irqrestore+0x31/0x40
[166817.648822] [<ffffffff810bb9b2>] complete+0x42/0x50
[166817.654231] [<ffffffff810df8f0>] ? trace_raw_output_rcu_utilization+0x60/0x60
[166817.662107] [<ffffffff810df902>] wakeme_after_rcu+0x12/0x20
[166817.668302] [<ffffffff810e3aa5>] rcu_process_callbacks+0x2f5/0x6a0
[166817.675140] [<ffffffff810e3a3f>] ? rcu_process_callbacks+0x28f/0x6a0
[166817.682143] [<ffffffff81724c83>] __do_softirq+0x113/0x2c6
[166817.688121] [<ffffffff8107ca53>] irq_exit+0xa3/0xb0
[166817.693553] [<ffffffff81724a42>] smp_apic_timer_interrupt+0x42/0x50
[166817.700467] [<ffffffff81722da2>] apic_timer_interrupt+0x82/0x90
[166817.706980] <EOI> [<ffffffff815ad21b>] ? cpuidle_enter_state+0x12b/0x2d0
[166817.714482] [<ffffffff815ad3f7>] cpuidle_enter+0x17/0x20
[166817.720354] [<ffffffff810bbada>] call_cpuidle+0x2a/0x50
[166817.726144] [<ffffffff810bbeaf>] cpu_startup_entry+0x28f/0x340
[166817.732587] [<ffffffff8104fda3>] start_secondary+0x133/0x140
[166817.738867] ---[ end trace 05ef6c9af3dc0e24 ]---
next reply other threads:[~2016-08-12 16:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-12 16:59 Vince Weaver [this message]
2016-08-16 10:07 ` Peter Zijlstra
2016-08-16 16:17 ` Vince Weaver
2016-08-16 17:03 ` Peter Zijlstra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=alpine.DEB.2.20.1608121255150.13657@macbook-air \
--to=vincent.weaver@maine.edu \
--cc=acme@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®