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From: James Simmons <jsimmons@infradead.org>
To: Fengguang Wu <fengguang.wu@intel.com>
Cc: devel@driverdev.osuosl.org,
	Andreas Dilger <andreas.dilger@intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org, Oleg Drokin <oleg.drokin@intel.com>,
	lkp@01.org, Denis Petrovic <denis.petrovic@edu.ece.fr>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	lustre-devel@lists.lustre.org
Subject: Re: [cfs_trace_lock_tcd] BUG: unable to handle kernel NULL pointer dereference at 00000050
Date: Wed, 18 Apr 2018 14:59:15 +0100 (BST)	[thread overview]
Message-ID: <alpine.LFD.2.21.1804181456590.5599@casper.infradead.org> (raw)
In-Reply-To: <20180418133831.uef7d77ejdyjtxgh@wfg-t540p.sh.intel.com>


> Hello,
> 
> FYI this happens in mainline kernel 4.17.0-rc1.
> It looks like a new regression.
> 
> [    7.587002]  lnet_selftest_init+0x2c4/0x5d9:
> 						lnet_selftest_init at drivers/staging/lustre/lnet/selftest/module.c:134
> [    7.587002]  ? lnet_selftest_exit+0x8d/0x8d:
> 						lnet_selftest_init at drivers/staging/lustre/lnet/selftest/module.c:90

Are you running lnet selftest ? Is this a UMP setup? The reason I ask is
that their is a SMP handling bug in lnet selftest. If you look at the
mailing list I pushed a SMP patch series. Can you try that series and
tell me if it works for you. Thanks
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  parent reply	other threads:[~2018-04-18 13:59 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-18 13:38 Fengguang Wu
2018-04-18 13:40 ` [cfs_trace_lock_tcd] BUG: KASAN: null-ptr-deref in cfs_trace_lock_tcd+0x25/0xeb Fengguang Wu
2018-04-18 18:37   ` Linus Torvalds
2018-04-18 22:38     ` NeilBrown
2018-04-19 13:35     ` Andrey Ryabinin
2018-04-19 13:55       ` Andrey Ryabinin
2018-04-18 13:59 ` James Simmons [this message]
2018-04-18 14:13   ` [cfs_trace_lock_tcd] BUG: unable to handle kernel NULL pointer dereference at 00000050 Fengguang Wu
2018-04-18 14:15 ` [lnet_res_container_setup] BUG: unable to handle kernel paging request at 08000664 Fengguang Wu

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