linux-kernel - mm: WARN at mm/vmalloc.c:130 vmap_page_range

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Date:	Tue, 09 Sep 2014 10:25:43 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	"linux-mm@...ck.org" <linux-mm@...ck.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	David Rientjes <rientjes@...gle.com>,
	liwanp@...ux.vnet.ibm.com, Dave Jones <davej@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: mm: WARN at mm/vmalloc.c:130 vmap_page_range_noflush

Hi all,

While fuzzing with trinity inside a KVM tools guest running the latest -next
kernel, I've stumbled on the following spew:

[ 1219.823164] WARNING: CPU: 19 PID: 9384 at mm/vmalloc.c:130 vmap_page_range_noflush+0x2f9/0x3b0()
[ 1219.823170] Modules linked in:
[ 1219.823178] CPU: 19 PID: 9384 Comm: trinity-c349 Not tainted 3.17.0-rc4-next-20140909-sasha-00032-gc16d47b #1131
[ 1219.823184]  0000000000000009 ffff8801bff47d60 ffffffffb24c5ec5 0000000000000000
[ 1219.823190]  ffff8801bff47d98 ffffffffaf16e4fd ffffc90082000000 0000000000037600
[ 1219.823195]  ffff880779badd70 ffffc90009527000 ffffc90081fae000 ffff8801bff47da8
[ 1219.823197] Call Trace:
[ 1219.823211] dump_stack (lib/dump_stack.c:52)
[ 1219.823225] warn_slowpath_common (kernel/panic.c:432)
[ 1219.823232] warn_slowpath_null (kernel/panic.c:466)
[ 1219.823237] vmap_page_range_noflush (mm/vmalloc.c:130 mm/vmalloc.c:149 mm/vmalloc.c:166 mm/vmalloc.c:191)
[ 1219.823245] map_vm_area (mm/vmalloc.c:1281)
[ 1219.823250] __vmalloc_node_range (mm/vmalloc.c:1605 mm/vmalloc.c:1649)
[ 1219.823260] ? SyS_init_module (kernel/module.c:2500 kernel/module.c:3351 kernel/module.c:3338)
[ 1219.823266] vmalloc (mm/vmalloc.c:1724)
[ 1219.823271] ? SyS_init_module (kernel/module.c:2500 kernel/module.c:3351 kernel/module.c:3338)
[ 1219.823276] SyS_init_module (kernel/module.c:2500 kernel/module.c:3351 kernel/module.c:3338)
[ 1219.823285] tracesys (arch/x86/kernel/entry_64.S:542)


Thanks,
Sasha
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