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From: Heiko Carstens <heiko.carstens@de.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@kernel.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>,
	linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: WARN_ON_ONCE(!new_owner) within wake_futex_pi() triggered
Date: Tue, 27 Nov 2018 09:11:15 +0100	[thread overview]
Message-ID: <20181127081115.GB3625@osiris> (raw)

Hello,

with the glibc self-tests I was able to trigger the "this should not
happen" warning ;) below on s390 (with panic_on_warn=1 set). It looks
like it is hardly reproducible.

This one happened with commit d146194f31c9 for compiling the kernel.
Config can be re-created with "make ARCH=s390 performance_defconfig".

[  649.596938] WARNING: CPU: 0 PID: 58886 at kernel/futex.c:1418 do_futex+0xa9a/0xc50
[  649.596946] Kernel panic - not syncing: panic_on_warn set ...
[  649.596951] CPU: 0 PID: 58886 Comm: ld64.so.1 Not tainted 4.20.0-20181125.rc3.git0.d146194f31c9.300.fc29.s390x+git #1
[  649.596953] Hardware name: IBM 2964 NC9 702 (z/VM 6.4.0)
[  649.596956] Call Trace:
[  649.596963] ([<0000000000113050>] show_stack+0x58/0x70)
[  649.596970]  [<0000000000a62a92>] dump_stack+0x7a/0xa8
[  649.596975]  [<0000000000144012>] panic+0x11a/0x258
[  649.596978]  [<0000000000143e70>] __warn+0xf8/0x118
[  649.596981]  [<0000000000a61c20>] report_bug+0xd8/0x150
[  649.596985]  [<00000000001014ac>] do_report_trap+0xc4/0xe0
[  649.596988]  [<0000000000101680>] illegal_op+0x138/0x150
[  649.596994]  [<0000000000a82bec>] pgm_check_handler+0x1cc/0x220
[  649.596998]  [<00000000001e89b2>] do_futex+0xa9a/0xc50
[  649.597002] ([<00000000001e8b16>] do_futex+0xbfe/0xc50)
[  649.597006]  [<00000000001e8c4c>] sys_futex+0xe4/0x170
[  649.597010]  [<0000000000a82800>] system_call+0xdc/0x2c8

Thanks,
Heiko


             reply	other threads:[~2018-11-27  8:11 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-27  8:11 Heiko Carstens [this message]
2018-11-28 14:32 ` WARN_ON_ONCE(!new_owner) within wake_futex_pi() triggered Thomas Gleixner
2018-11-29 11:23   ` Heiko Carstens
2019-01-21 12:21     ` Heiko Carstens
2019-01-21 13:12       ` Thomas Gleixner
2019-01-22 21:14         ` Thomas Gleixner
2019-01-23  9:24           ` Heiko Carstens
2019-01-23 12:33             ` Thomas Gleixner
2019-01-23 12:40               ` Heiko Carstens
2019-01-28 13:44     ` Peter Zijlstra
2019-01-28 13:58       ` Peter Zijlstra
2019-01-28 15:53         ` Thomas Gleixner
2019-01-29  8:49           ` Peter Zijlstra
2019-01-29 22:15             ` [PATCH] futex: Handle early deadlock return correctly Thomas Gleixner
2019-01-30 12:01               ` Thomas Gleixner
2019-02-08 12:05               ` [tip:locking/urgent] " tip-bot for Thomas Gleixner
2019-01-29  9:01           ` WARN_ON_ONCE(!new_owner) within wake_futex_pi() triggered Heiko Carstens
2019-01-29  9:33             ` Peter Zijlstra
2019-01-29  9:45             ` Thomas Gleixner
2019-01-29 10:24               ` Heiko Carstens
2019-01-29 10:35                 ` Peter Zijlstra
2019-01-29 13:03                   ` Thomas Gleixner
2019-01-29 13:23                     ` Heiko Carstens
     [not found]                       ` <20190129151058.GG26906@osiris>
2019-01-29 17:16                         ` Sebastian Sewior
2019-01-29 21:45                           ` Thomas Gleixner
     [not found]                           ` <20190130094913.GC5299@osiris>
2019-01-30 12:15                             ` Thomas Gleixner
     [not found]                               ` <20190130125955.GD5299@osiris>
2019-01-30 13:24                                 ` Sebastian Sewior
2019-01-30 13:29                                   ` Thomas Gleixner
2019-01-30 14:33                                     ` Thomas Gleixner
2019-01-30 17:56                                       ` Thomas Gleixner
2019-01-30 21:07                                         ` Sebastian Sewior
2019-01-30 23:13                                           ` WARN_ON_ONCE(!new_owner) within wake_futex_pi() triggerede Thomas Gleixner
2019-01-30 23:35                                             ` Paul E. McKenney
2019-01-30 23:55                                               ` Thomas Gleixner
2019-01-31  0:27                                                 ` Thomas Gleixner
2019-01-31  1:45                                                   ` Paul E. McKenney
2019-01-31 16:52                                                   ` Heiko Carstens
2019-01-31 17:06                                                     ` Sebastian Sewior
2019-01-31 20:42                                                       ` Heiko Carstens
2019-02-01 16:12                                                       ` Heiko Carstens
2019-02-01 21:59                                                         ` Thomas Gleixner
     [not found]                                                           ` <20190202091043.GA3381@osiris>
2019-02-02 10:14                                                             ` Thomas Gleixner
2019-02-02 11:20                                                               ` Heiko Carstens
2019-02-03 16:30                                                                 ` Thomas Gleixner
2019-02-04 11:40                                                                   ` Heiko Carstens
2019-01-31  1:44                                                 ` Paul E. McKenney
2019-01-30 13:25                                 ` WARN_ON_ONCE(!new_owner) within wake_futex_pi() triggered Thomas Gleixner

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