From: Sasha Levin <sasha.levin@oracle.com>
To: Rik van Riel <riel@redhat.com>
Cc: David Rientjes <rientjes@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: mm: kernel BUG at mm/mprotect.c:149
Date: Thu, 06 Mar 2014 16:12:28 -0500 [thread overview]
Message-ID: <5318E4BC.50301@oracle.com> (raw)
Hi Rik,
While fuzzing with trinity inside a KVM tools guest running latest -next kernel I've hit the
following spew. This seems to be introduced by your patch "mm,numa: reorganize change_pmd_range()".
[ 886.745765] kernel BUG at mm/mprotect.c:149!
[ 886.746831] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[ 886.748511] Dumping ftrace buffer:
[ 886.749998] (ftrace buffer empty)
[ 886.750110] Modules linked in:
[ 886.751396] CPU: 20 PID: 26219 Comm: trinity-c216 Tainted: G W 3.14.0-rc5-next-20140305-sasha-00011-ge06f5f3-dirty #105
[ 886.751396] task: ffff8800b6c80000 ti: ffff880228436000 task.ti: ffff880228436000
[ 886.751396] RIP: 0010:[<ffffffff812aab33>] [<ffffffff812aab33>] change_protection_range+0x3b3/0x500
[ 886.751396] RSP: 0000:ffff880228437da8 EFLAGS: 00010282
[ 886.751396] RAX: 8000000527c008e5 RBX: 00007f647916e000 RCX: 0000000000000000
[ 886.751396] RDX: ffff8802ef488e40 RSI: 00007f6479000000 RDI: 8000000527c008e5
[ 886.751396] RBP: ffff880228437e78 R08: 0000000000000000 R09: 0000000000000000
[ 886.751396] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8802ef488e40
[ 886.751396] R13: 00007f6479000000 R14: 00007f647916e000 R15: 00007f646e34e000
[ 886.751396] FS: 00007f64b28d4700(0000) GS:ffff88052ba00000(0000) knlGS:0000000000000000
[ 886.751396] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 886.751396] CR2: 00007f64aed83af8 CR3: 0000000206e52000 CR4: 00000000000006a0
[ 886.751396] Stack:
[ 886.751396] ffff880200000001 ffffffff8447f152 ffff880228437dd8 ffff880228af3000
[ 886.769142] 00007f646e34e000 00007f647916dfff 0000000000000000 00007f647916e000
[ 886.769142] ffff880206e527f0 00007f647916dfff 0000000000000000 0000000000000000
[ 886.769142] Call Trace:
[ 886.769142] [<ffffffff8447f152>] ? preempt_count_sub+0xe2/0x120
[ 886.769142] [<ffffffff812aaca5>] change_protection+0x25/0x30
[ 886.769142] [<ffffffff812c3eeb>] change_prot_numa+0x1b/0x30
[ 886.769142] [<ffffffff8118df49>] task_numa_work+0x279/0x360
[ 886.769142] [<ffffffff8116c57e>] task_work_run+0xae/0xf0
[ 886.769142] [<ffffffff8106ffbe>] do_notify_resume+0x8e/0xe0
[ 886.769142] [<ffffffff8447a93b>] retint_signal+0x4d/0x92
[ 886.769142] Code: 49 8b 3c 24 48 83 3d fc 2e ba 04 00 75 12 0f 0b 0f 1f 84 00 00 00 00 00 eb fe 66 0f 1f 44 00 00 48 89 f8 66 66 66 90 84 c0 79 0d <0f> 0b 0f 1f 00 eb fe 66 0f 1f 44 00 00 8b 4d 9c 44 8b 4d 98 89
[ 886.769142] RIP [<ffffffff812aab33>] change_protection_range+0x3b3/0x500
[ 886.769142] RSP <ffff880228437da8>
Thanks,
Sasha
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next reply other threads:[~2014-03-06 21:16 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-06 21:12 Sasha Levin [this message]
2014-03-06 22:31 ` [PATCH -mm] mm,numa,mprotect: always continue after finding a stable thp page Rik van Riel
2014-03-06 22:31 ` Rik van Riel
2014-03-06 22:52 ` Rik van Riel
2014-03-07 14:06 ` Mel Gorman
2014-03-07 15:09 ` Mel Gorman
2014-03-07 15:13 ` Mel Gorman
2014-03-07 18:27 ` Mel Gorman
2014-03-11 16:28 ` Mel Gorman
2014-03-11 16:51 ` Sasha Levin
2014-03-11 17:00 ` Rik van Riel
2014-03-11 17:33 ` Sasha Levin
2014-03-11 17:32 ` Rik van Riel
2014-03-11 18:06 ` Mel Gorman
2014-03-11 19:18 ` Sasha Levin
2014-03-11 19:28 ` Andrew Morton
2014-03-11 19:33 ` Sasha Levin
2014-03-12 10:36 ` [PATCH] mm: numa: Recheck for transhuge pages under lock during protection changes Mel Gorman
2014-03-12 12:16 ` Rik van Riel
2014-03-15 3:15 ` Sasha Levin
2014-03-19 14:38 ` Mel Gorman
2014-03-21 22:06 ` Andrew Morton
2014-03-21 22:36 ` Sasha Levin
2014-03-21 22:24 ` Rik van Riel
2014-03-11 19:31 ` [PATCH -mm] mm,numa,mprotect: always continue after finding a stable thp page Davidlohr Bueso
2014-03-07 1:04 ` Sasha Levin
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