From: Sasha Levin <sasha.levin@oracle.com>
To: "linux-mm@kvack.org" <linux-mm@kvack.org>
Cc: Hugh Dickins <hughd@google.com>,
Christoph Lameter <cl@gentwo.org>,
Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
Dave Jones <davej@redhat.com>
Subject: mm: NULL ptr deref in remove_migration_pte
Date: Wed, 16 Apr 2014 10:59:22 -0400 [thread overview]
Message-ID: <534E9ACA.2090008@oracle.com> (raw)
Hi all,
While fuzzing with trinity inside a KVM tools guest running latest -next
kernel I've stumbled on the following:
[ 2552.313602] BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
[ 2552.315878] IP: __lock_acquire (kernel/locking/lockdep.c:3070 (discriminator 1))
[ 2552.315878] PGD 465836067 PUD 465837067 PMD 0
[ 2552.315878] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[ 2552.315878] Dumping ftrace buffer:
[ 2552.315878] (ftrace buffer empty)
[ 2552.315878] Modules linked in:
[ 2552.315878] CPU: 6 PID: 16173 Comm: trinity-c364 Tainted: G W 3.15.0-rc1-next-20140415-sasha-00020-gaa90d09 #398
[ 2552.315878] task: ffff88046548b000 ti: ffff88044e532000 task.ti: ffff88044e532000
[ 2552.320286] RIP: __lock_acquire (kernel/locking/lockdep.c:3070 (discriminator 1))
[ 2552.320286] RSP: 0018:ffff88044e5339c8 EFLAGS: 00010002
[ 2552.320286] RAX: 0000000000000082 RBX: ffff88046548b000 RCX: 0000000000000000
[ 2552.320286] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000018
[ 2552.320286] RBP: ffff88044e533ab8 R08: 0000000000000001 R09: 0000000000000000
[ 2552.320286] R10: ffff88046548b000 R11: 0000000000000001 R12: 0000000000000000
[ 2552.320286] R13: 0000000000000018 R14: 0000000000000000 R15: 0000000000000000
[ 2552.320286] FS: 00007fd286a9a700(0000) GS:ffff88018b000000(0000) knlGS:0000000000000000
[ 2552.320286] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 2552.320286] CR2: 0000000000000018 CR3: 0000000442c17000 CR4: 00000000000006a0
[ 2552.320286] DR0: 0000000000695000 DR1: 0000000000000000 DR2: 0000000000000000
[ 2552.320286] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[ 2552.320286] Stack:
[ 2552.320286] ffff88044e5339e8 ffffffff9f56e761 0000000000000000 ffff880315c13000
[ 2552.320286] ffff88044e533a38 ffffffff9c193f0d ffffffff9c193e34 ffff8804654e8000
[ 2552.320286] ffff8804654e8000 0000000000000001 ffff88046548b000 0000000000000007
[ 2552.320286] Call Trace:
[ 2552.320286] ? _raw_spin_unlock_irq (arch/x86/include/asm/preempt.h:98 include/linux/spinlock_api_smp.h:169 kernel/locking/spinlock.c:199)
[ 2552.320286] ? finish_task_switch (include/linux/tick.h:206 kernel/sched/core.c:2163)
[ 2552.320286] ? finish_task_switch (arch/x86/include/asm/current.h:14 kernel/sched/sched.h:993 kernel/sched/core.c:2145)
[ 2552.320286] ? retint_restore_args (arch/x86/kernel/entry_64.S:1040)
[ 2552.320286] ? __this_cpu_preempt_check (lib/smp_processor_id.c:63)
[ 2552.320286] ? trace_hardirqs_on_caller (kernel/locking/lockdep.c:2557 kernel/locking/lockdep.c:2599)
[ 2552.320286] lock_acquire (arch/x86/include/asm/current.h:14 kernel/locking/lockdep.c:3602)
[ 2552.320286] ? remove_migration_pte (mm/migrate.c:137)
[ 2552.320286] ? retint_restore_args (arch/x86/kernel/entry_64.S:1040)
[ 2552.320286] _raw_spin_lock (include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:151)
[ 2552.320286] ? remove_migration_pte (mm/migrate.c:137)
[ 2552.320286] remove_migration_pte (mm/migrate.c:137)
[ 2552.320286] rmap_walk (mm/rmap.c:1628 mm/rmap.c:1699)
[ 2552.320286] remove_migration_ptes (mm/migrate.c:224)
[ 2552.320286] ? new_page_node (mm/migrate.c:107)
[ 2552.320286] ? remove_migration_pte (mm/migrate.c:195)
[ 2552.320286] migrate_pages (mm/migrate.c:922 mm/migrate.c:960 mm/migrate.c:1126)
[ 2552.320286] ? perf_trace_mm_numa_migrate_ratelimit (mm/migrate.c:1574)
[ 2552.320286] migrate_misplaced_page (mm/migrate.c:1733)
[ 2552.320286] __handle_mm_fault (mm/memory.c:3762 mm/memory.c:3812 mm/memory.c:3925)
[ 2552.320286] ? __const_udelay (arch/x86/lib/delay.c:126)
[ 2552.320286] ? __rcu_read_unlock (kernel/rcu/update.c:97)
[ 2552.320286] handle_mm_fault (mm/memory.c:3948)
[ 2552.320286] __get_user_pages (mm/memory.c:1851)
[ 2552.320286] ? preempt_count_sub (kernel/sched/core.c:2527)
[ 2552.320286] __mlock_vma_pages_range (mm/mlock.c:255)
[ 2552.320286] __mm_populate (mm/mlock.c:711)
[ 2552.320286] SyS_mlockall (include/linux/mm.h:1799 mm/mlock.c:817 mm/mlock.c:791)
[ 2552.320286] tracesys (arch/x86/kernel/entry_64.S:749)
[ 2552.320286] Code: 85 2d 1e 00 00 48 c7 c1 d7 68 6c a0 48 c7 c2 47 11 6c a0 31 c0 be fa 0b 00 00 48 c7 c7 91 68 6c a0 e8 1c 6d f9 ff e9 07 1e 00 00 <49> 81 7d 00 80 31 76 a2 b8 00 00 00 00 44 0f 44 c0 eb 07 0f 1f
[ 2552.320286] RIP __lock_acquire (kernel/locking/lockdep.c:3070 (discriminator 1))
[ 2552.320286] RSP <ffff88044e5339c8>
[ 2552.320286] CR2: 0000000000000018
Thanks,
Sasha
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WARNING: multiple messages have this Message-ID (diff)
From: Sasha Levin <sasha.levin@oracle.com>
To: "linux-mm@kvack.org" <linux-mm@kvack.org>
Cc: Hugh Dickins <hughd@google.com>,
Christoph Lameter <cl@gentwo.org>,
Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
Dave Jones <davej@redhat.com>
Subject: mm: NULL ptr deref in remove_migration_pte
Date: Wed, 16 Apr 2014 10:59:22 -0400 [thread overview]
Message-ID: <534E9ACA.2090008@oracle.com> (raw)
Hi all,
While fuzzing with trinity inside a KVM tools guest running latest -next
kernel I've stumbled on the following:
[ 2552.313602] BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
[ 2552.315878] IP: __lock_acquire (kernel/locking/lockdep.c:3070 (discriminator 1))
[ 2552.315878] PGD 465836067 PUD 465837067 PMD 0
[ 2552.315878] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[ 2552.315878] Dumping ftrace buffer:
[ 2552.315878] (ftrace buffer empty)
[ 2552.315878] Modules linked in:
[ 2552.315878] CPU: 6 PID: 16173 Comm: trinity-c364 Tainted: G W 3.15.0-rc1-next-20140415-sasha-00020-gaa90d09 #398
[ 2552.315878] task: ffff88046548b000 ti: ffff88044e532000 task.ti: ffff88044e532000
[ 2552.320286] RIP: __lock_acquire (kernel/locking/lockdep.c:3070 (discriminator 1))
[ 2552.320286] RSP: 0018:ffff88044e5339c8 EFLAGS: 00010002
[ 2552.320286] RAX: 0000000000000082 RBX: ffff88046548b000 RCX: 0000000000000000
[ 2552.320286] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000018
[ 2552.320286] RBP: ffff88044e533ab8 R08: 0000000000000001 R09: 0000000000000000
[ 2552.320286] R10: ffff88046548b000 R11: 0000000000000001 R12: 0000000000000000
[ 2552.320286] R13: 0000000000000018 R14: 0000000000000000 R15: 0000000000000000
[ 2552.320286] FS: 00007fd286a9a700(0000) GS:ffff88018b000000(0000) knlGS:0000000000000000
[ 2552.320286] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 2552.320286] CR2: 0000000000000018 CR3: 0000000442c17000 CR4: 00000000000006a0
[ 2552.320286] DR0: 0000000000695000 DR1: 0000000000000000 DR2: 0000000000000000
[ 2552.320286] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[ 2552.320286] Stack:
[ 2552.320286] ffff88044e5339e8 ffffffff9f56e761 0000000000000000 ffff880315c13000
[ 2552.320286] ffff88044e533a38 ffffffff9c193f0d ffffffff9c193e34 ffff8804654e8000
[ 2552.320286] ffff8804654e8000 0000000000000001 ffff88046548b000 0000000000000007
[ 2552.320286] Call Trace:
[ 2552.320286] ? _raw_spin_unlock_irq (arch/x86/include/asm/preempt.h:98 include/linux/spinlock_api_smp.h:169 kernel/locking/spinlock.c:199)
[ 2552.320286] ? finish_task_switch (include/linux/tick.h:206 kernel/sched/core.c:2163)
[ 2552.320286] ? finish_task_switch (arch/x86/include/asm/current.h:14 kernel/sched/sched.h:993 kernel/sched/core.c:2145)
[ 2552.320286] ? retint_restore_args (arch/x86/kernel/entry_64.S:1040)
[ 2552.320286] ? __this_cpu_preempt_check (lib/smp_processor_id.c:63)
[ 2552.320286] ? trace_hardirqs_on_caller (kernel/locking/lockdep.c:2557 kernel/locking/lockdep.c:2599)
[ 2552.320286] lock_acquire (arch/x86/include/asm/current.h:14 kernel/locking/lockdep.c:3602)
[ 2552.320286] ? remove_migration_pte (mm/migrate.c:137)
[ 2552.320286] ? retint_restore_args (arch/x86/kernel/entry_64.S:1040)
[ 2552.320286] _raw_spin_lock (include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:151)
[ 2552.320286] ? remove_migration_pte (mm/migrate.c:137)
[ 2552.320286] remove_migration_pte (mm/migrate.c:137)
[ 2552.320286] rmap_walk (mm/rmap.c:1628 mm/rmap.c:1699)
[ 2552.320286] remove_migration_ptes (mm/migrate.c:224)
[ 2552.320286] ? new_page_node (mm/migrate.c:107)
[ 2552.320286] ? remove_migration_pte (mm/migrate.c:195)
[ 2552.320286] migrate_pages (mm/migrate.c:922 mm/migrate.c:960 mm/migrate.c:1126)
[ 2552.320286] ? perf_trace_mm_numa_migrate_ratelimit (mm/migrate.c:1574)
[ 2552.320286] migrate_misplaced_page (mm/migrate.c:1733)
[ 2552.320286] __handle_mm_fault (mm/memory.c:3762 mm/memory.c:3812 mm/memory.c:3925)
[ 2552.320286] ? __const_udelay (arch/x86/lib/delay.c:126)
[ 2552.320286] ? __rcu_read_unlock (kernel/rcu/update.c:97)
[ 2552.320286] handle_mm_fault (mm/memory.c:3948)
[ 2552.320286] __get_user_pages (mm/memory.c:1851)
[ 2552.320286] ? preempt_count_sub (kernel/sched/core.c:2527)
[ 2552.320286] __mlock_vma_pages_range (mm/mlock.c:255)
[ 2552.320286] __mm_populate (mm/mlock.c:711)
[ 2552.320286] SyS_mlockall (include/linux/mm.h:1799 mm/mlock.c:817 mm/mlock.c:791)
[ 2552.320286] tracesys (arch/x86/kernel/entry_64.S:749)
[ 2552.320286] Code: 85 2d 1e 00 00 48 c7 c1 d7 68 6c a0 48 c7 c2 47 11 6c a0 31 c0 be fa 0b 00 00 48 c7 c7 91 68 6c a0 e8 1c 6d f9 ff e9 07 1e 00 00 <49> 81 7d 00 80 31 76 a2 b8 00 00 00 00 44 0f 44 c0 eb 07 0f 1f
[ 2552.320286] RIP __lock_acquire (kernel/locking/lockdep.c:3070 (discriminator 1))
[ 2552.320286] RSP <ffff88044e5339c8>
[ 2552.320286] CR2: 0000000000000018
Thanks,
Sasha
next reply other threads:[~2014-04-16 15:06 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-16 14:59 Sasha Levin [this message]
2014-04-16 14:59 ` mm: NULL ptr deref in remove_migration_pte Sasha Levin
2014-05-05 15:51 ` Sasha Levin
2014-05-05 15:51 ` Sasha Levin
2014-05-24 0:38 ` Sasha Levin
2014-05-24 0:38 ` Sasha Levin
2014-05-26 20:05 ` Hugh Dickins
2014-05-26 20:05 ` Hugh Dickins
2014-05-27 13:52 ` Sasha Levin
2014-05-27 13:52 ` Sasha Levin
2014-06-10 4:20 ` Hugh Dickins
2014-06-10 4:20 ` Hugh Dickins
2014-06-10 10:09 ` Kirill A. Shutemov
2014-06-10 10:09 ` Kirill A. Shutemov
2014-06-16 21:04 ` Sasha Levin
2014-06-16 21:04 ` Sasha Levin
2014-06-17 14:09 ` Christoph Lameter
2014-06-17 14:09 ` Christoph Lameter
2014-06-18 3:36 ` Hugh Dickins
2014-06-18 3:36 ` Hugh Dickins
2014-06-18 11:24 ` Sasha Levin
2014-06-18 11:24 ` Sasha Levin
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