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Date: Mon, 10 Aug 2009 13:35:40 -0400 From: Eric Paris <eparis@...hat.com> To: linux-kernel@...r.kernel.org Cc: vegardno@....uio.no, penberg@...helsinki.fi, mingo@...e.hu Subject: kmemcheck in linux-next causes NULL pointer dereference at task_rq_lock I'm using 2.6.31-rc5-next-20090810 on a vmware server. Originally I saw messages about setting to one cpu, so I booted with maxcpu=1. I get this same panic with and without maxpu. Booting with kmemcheck=0 boots just fine. I have not tested kmemcheck in linus' tree but will start looking for a working version now. Any suggestions or things I should try? [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Linux version 2.6.31-rc5-next-20090810 (***) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)) #11 SMP Mon Aug 10 10:22:38 EDT 2009 [ 0.000000] Command line: ro root=/dev/VolGroup00/LogVol00 audit=1 console=tty0 console=ttyS0,9600 maxcpus=1 [ 0.000000] KERNEL supported cpus: [ 0.000000] Intel GenuineIntel [ 0.000000] AMD AuthenticAMD [ 0.000000] Centaur CentaurHauls [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009f800 (usable) [ 0.000000] BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved) [ 0.000000] BIOS-e820: 00000000000ca000 - 00000000000cc000 (reserved) [ 0.000000] BIOS-e820: 00000000000dc000 - 00000000000e0000 (reserved) [ 0.000000] BIOS-e820: 00000000000e4000 - 0000000000100000 (reserved) [ 0.000000] BIOS-e820: 0000000000100000 - 000000003fef0000 (usable) [ 0.000000] BIOS-e820: 000000003fef0000 - 000000003feff000 (ACPI data) [ 0.000000] BIOS-e820: 000000003feff000 - 000000003ff00000 (ACPI NVS) [ 0.000000] BIOS-e820: 000000003ff00000 - 0000000040000000 (usable) [ 0.000000] BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) [ 0.000000] BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) [ 0.000000] BIOS-e820: 00000000fffe0000 - 0000000100000000 (reserved) [ 0.000000] DMI present. [ 0.000000] Phoenix BIOS detected: BIOS may corrupt low RAM, working around it. [ 0.000000] last_pfn = 0x40000 max_arch_pfn = 0x400000000 [ 0.000000] x86 PAT enabled: cpu 0, old 0x0, new 0x7010600070106 [ 0.000000] Scanning 0 areas for low memory corruption [ 0.000000] modified physical RAM map: [ 0.000000] modified: 0000000000000000 - 0000000000010000 (reserved) [ 0.000000] modified: 0000000000010000 - 000000000009f800 (usable) [ 0.000000] modified: 000000000009f800 - 00000000000a0000 (reserved) [ 0.000000] modified: 00000000000ca000 - 00000000000cc000 (reserved) [ 0.000000] modified: 00000000000dc000 - 00000000000e0000 (reserved) [ 0.000000] modified: 00000000000e4000 - 0000000000100000 (reserved) [ 0.000000] modified: 0000000000100000 - 000000003fef0000 (usable) [ 0.000000] modified: 000000003fef0000 - 000000003feff000 (ACPI data) [ 0.000000] modified: 000000003feff000 - 000000003ff00000 (ACPI NVS) [ 0.000000] modified: 000000003ff00000 - 0000000040000000 (usable) [ 0.000000] modified: 00000000fec00000 - 00000000fec10000 (reserved) [ 0.000000] modified: 00000000fee00000 - 00000000fee01000 (reserved) [ 0.000000] modified: 00000000fffe0000 - 0000000100000000 (reserved) [ 0.000000] init_memory_mapping: 0000000000000000-0000000040000000 [ 0.000000] RAMDISK: 37c56000 - 37fefbe1 [ 0.000000] ACPI: RSDP 00000000000f6a30 00024 (v02 PTLTD ) [ 0.000000] ACPI: XSDT 000000003fefa138 0003C (v01 INTEL 440BX 06040000 VMW 01324272) [ 0.000000] ACPI: FACP 000000003fefee98 000F4 (v04 INTEL 440BX 06040000 PTL 000F4240) [ 0.000000] ACPI: DSDT 000000003fefa22a 04C6E (v01 PTLTD Custom 06040000 MSFT 03000001) [ 0.000000] ACPI: FACS 000000003fefffc0 00040 [ 0.000000] ACPI: BOOT 000000003fefa202 00028 (v01 PTLTD $SBFTBL$ 06040000 LTP 00000001) [ 0.000000] ACPI: APIC 000000003fefa1a4 0005E (v01 PTLTD ? APIC 06040000 LTP 00000000) [ 0.000000] No NUMA configuration found [ 0.000000] Faking a node at 0000000000000000-0000000040000000 [ 0.000000] Bootmem setup node 0 0000000000000000-0000000040000000 [ 0.000000] NODE_DATA [0000000000010000 - 0000000000027fff] [ 0.000000] bootmap [0000000000028000 - 000000000002ffff] pages 8 [ 0.000000] (7 early reservations) ==> bootmem [0000000000 - 0040000000] [ 0.000000] #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000] [ 0.000000] #1 [0000006000 - 0000008000] TRAMPOLINE ==> [0000006000 - 0000008000] [ 0.000000] #2 [0001000000 - 000261d1f0] TEXT DATA BSS ==> [0001000000 - 000261d1f0] [ 0.000000] #3 [0037c56000 - 0037fefbe1] RAMDISK ==> [0037c56000 - 0037fefbe1] [ 0.000000] #4 [000009f800 - 0000100000] BIOS reserved ==> [000009f800 - 0000100000] [ 0.000000] #5 [000261e000 - 000261e1e8] BRK ==> [000261e000 - 000261e1e8] [ 0.000000] #6 [0000100000 - 0000300000] PGTABLE ==> [0000100000 - 0000300000] [ 0.000000] found SMP MP-table at [ffff8800000f6aa0] f6aa0 [ 0.000000] Zone PFN ranges: [ 0.000000] DMA 0x00000010 -> 0x00001000 [ 0.000000] DMA32 0x00001000 -> 0x00100000 [ 0.000000] Normal 0x00100000 -> 0x00100000 [ 0.000000] Movable zone start PFN for each node [ 0.000000] early_node_map[3] active PFN ranges [ 0.000000] 0: 0x00000010 -> 0x0000009f [ 0.000000] 0: 0x00000100 -> 0x0003fef0 [ 0.000000] 0: 0x0003ff00 -> 0x00040000 [ 0.000000] ACPI: PM-Timer IO Port: 0x1008 [ 0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled) [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1]) [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1]) [ 0.000000] ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0]) [ 0.000000] IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, GSI 0-23 [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 high edge) [ 0.000000] Using ACPI (MADT) for SMP configuration information [ 0.000000] SMP: Allowing 2 CPUs, 0 hotplug CPUs [ 0.000000] Allocating PCI resources starting at 40000000 (gap: 40000000:bec00000) [ 0.000000] NR_CPUS:512 nr_cpumask_bits:512 nr_cpu_ids:2 nr_node_ids:1 [ 0.000000] PERCPU: Embedded 478 pages at ffff880002637000, static data 1926944 bytes [ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 254236 [ 0.000000] Policy zone: DMA32 [ 0.000000] Kernel command line: ro root=/dev/VolGroup00/LogVol00 audit=1 console=tty0 console=ttyS0,9600 maxcpus=1 [ 0.000000] audit: enabled (after initialization) [ 0.000000] PID hash table entries: 4096 (order: 12, 32768 bytes) [ 0.000000] Initializing CPU#0 [ 0.000000] Checking aperture... [ 0.000000] No AGP bridge found [ 0.000000] Memory: 986920k/1048576k available (5194k kernel code, 516k absent, 61140k reserved, 2771k data, 3304k init) [ 0.000000] SLUB: Genslabs=14, HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1 [ 0.000000] Hierarchical RCU implementation. [ 0.000000] RCU-based detection of stalled CPUs is enabled. [ 0.000000] NR_IRQS:4352 nr_irqs:424 [ 0.000000] Extended CMOS year: 2000 [ 0.000000] TSC: Frequency read from the hypervisor [ 0.000000] Detected 2666.725 MHz processor. [ 0.000999] Console: colour VGA+ 80x25 [ 0.000999] console [tty0] enabled [ 0.000999] console [ttyS0] enabled [ 0.000999] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar [ 0.000999] ... MAX_LOCKDEP_SUBCLASSES: 8 [ 0.000999] ... MAX_LOCK_DEPTH: 48 [ 0.000999] ... MAX_LOCKDEP_KEYS: 8191 [ 0.000999] ... CLASSHASH_SIZE: 4096 [ 0.000999] ... MAX_LOCKDEP_ENTRIES: 16384 [ 0.000999] ... MAX_LOCKDEP_CHAINS: 32768 [ 0.000999] ... CHAINHASH_SIZE: 16384 [ 0.000999] memory used by lock dependency info: 6367 kB [ 0.000999] per task-struct memory footprint: 2688 bytes [ 0.001072] Calibrating delay loop (skipped), value calculated using timer frequency.. 5333.45 BogoMIPS (lpj=2666725) [ 0.146034] Security Framework initialized [ 0.147018] SELinux: Initializing. [ 0.303965] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes) [ 0.395013] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes) [ 0.413405] Mount-cache hash table entries: 256 [ 1.235014] Initializing cgroup subsys ns [ 1.243083] Initializing cgroup subsys cpuacct [ 1.249158] Initializing cgroup subsys devices [ 1.254233] Initializing cgroup subsys freezer [ 1.290186] CPU: L1 I cache: 32K, L1 D cache: 32K [ 1.292009] CPU: L2 cache: 4096K [ 1.293019] CPU 0/0x0 -> Node 0 [ 1.294035] mce: CPU supports 0 MCE banks [ 1.295311] Performance Counters: Core2 events, Intel PMU driver. [ 1.298028] ... version: 2 [ 1.299009] ... bit width: 40 [ 1.300009] ... generic counters: 2 [ 1.301012] ... value mask: 000000ffffffffff [ 1.302009] ... max period: 000000007fffffff [ 1.303009] ... fixed-purpose counters: 3 [ 1.304012] ... counter mask: 0000000700000003 [ 1.312173] lockdep: fixing up alternatives. [ 1.313010] SMP alternatives: switching to UP code [ 1.400154] ACPI: Core revision 20090625 [ 20.118223] Setting APIC routing to flat [ 20.180762] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 [ 20.192798] CPU0: Intel(R) Xeon(R) CPU X5355 @ 2.66GHz stepping 07 [ 20.197016] kmemcheck: Initialized [ 20.198142] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 [ 20.199016] IP: [<ffffffff810522b0>] task_rq_lock+0x50/0xc0 [ 20.199016] PGD 0 [ 20.199016] Oops: 0000 [#1] SMP [ 20.199016] last sysfs file: [ 20.199016] CPU 0 [ 20.199016] Modules linked in: [ 20.199016] Pid: 1, comm: swapper Not tainted 2.6.31-rc5-next-20090810 #11 VMware Virtual Platform [ 20.199016] RIP: 0010:[<ffffffff810522b0>] [<ffffffff810522b0>] task_rq_lock+0x50/0xc0 [ 20.199016] RSP: 0018:ffff88003fba9bb0 EFLAGS: 00010046 [ 20.199016] RAX: 0000000000000000 RBX: 00000000001d5cc0 RCX: ffff880002637000 [ 20.199016] RDX: ffff88003fba0000 RSI: ffff88003fba9c18 RDI: ffffffff810522b0 [ 20.199016] RBP: ffff88003fba9be0 R08: 0000000000000000 R09: 0000000000000000 [ 20.199016] R10: 0000000000000001 R11: 0000000000000001 R12: 00000000001d5cc0 [ 20.199016] R13: 0000000000000000 R14: ffff88003fba9c18 R15: 0000000000093ab0 [ 20.199016] FS: 0000000000000000(0000) GS:ffff880002637000(0000) knlGS:0000000000000000 [ 20.199016] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [ 20.199016] CR2: ffff88003f80605c CR3: 0000000001001000 CR4: 00000000000006f0 [ 20.199016] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.199016] DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400 [ 20.199016] Process swapper (pid: 1, threadinfo ffff88003fba8000, task ffff88003fba0000) [ 20.199016] Stack: [ 20.199016] ffff88003fba9bc0 000000008279b5f0 ffff88003fba9c80 ffffffff81651d64 [ 20.199016] <0> ffffffff817f5e30 0000000000000000 ffff88003fba9c50 ffffffff8106058d [ 20.199016] <0> ffff88003fba9c40 0000000000000246 0000000f00000000 ffffffff8170ac60 [ 20.199016] Call Trace: [ 20.199016] [<ffffffff817f5e30>] ? migration_init+0x0/0x90 [ 20.199016] [<ffffffff8106058d>] try_to_wake_up+0x4d/0x410 [ 20.199016] [<ffffffff817f5e30>] ? migration_init+0x0/0x90 [ 20.199016] [<ffffffff810609f3>] wake_up_process+0x23/0x40 [ 20.199016] [<ffffffff8108e25b>] kthread_create+0x9b/0x180 [ 20.199016] [<ffffffff81065930>] ? migration_thread+0x0/0x380 [ 20.199016] [<ffffffff817f3920>] ? kmemcheck_init+0x0/0x90 [ 20.199016] [<ffffffff8106f779>] ? printk+0x79/0xa0 [ 20.199016] [<ffffffff81503aa5>] migration_call+0x255/0x650 [ 20.199016] [<ffffffff817f5e30>] ? migration_init+0x0/0x90 [ 20.199016] [<ffffffff817f5e67>] migration_init+0x37/0x90 [ 20.199016] [<ffffffff817f396d>] ? kmemcheck_init+0x4d/0x90 [ 20.199016] [<ffffffff8100a07b>] do_one_initcall+0x4b/0x1b0 [ 20.199016] [<ffffffff817e5f04>] ? native_smp_prepare_cpus+0x384/0x4e0 [ 20.199016] [<ffffffff817d4140>] ? early_idt_handler+0x0/0x71 [ 20.199016] [<ffffffff817d514c>] kernel_init+0xec/0x2e0 [ 20.199016] [<ffffffff810152aa>] child_rip+0xa/0x20 [ 20.199016] [<ffffffff81014c10>] ? restore_args+0x0/0x30 [ 20.199016] [<ffffffff817d5060>] ? kernel_init+0x0/0x2e0 [ 20.199016] [<ffffffff810152a0>] ? child_rip+0x0/0x20 [ 20.199016] Code: e0 49 89 f6 4c 89 65 e8 49 c7 c4 c0 5c 1d 00 9c 58 0f 1f 44 00 00 48 89 c2 fa 66 0f 1f 44 00 00 49 89 16 4c 89 e3 e8 80 0e 05 00 <49> 8b 45 08 8b 40 18 48 03 1c c5 c0 06 7c 81 48 89 df e8 b9 7f [ 20.199016] RIP [<ffffffff810522b0>] task_rq_lock+0x50/0xc0 [ 20.199016] RSP <ffff88003fba9bb0> [ 20.199016] CR2: 0000000000000008 [ 20.199016] ---[ end trace a7919e7f17c0a725 ]--- [ 20.237214] swapper used greatest stack depth: 4144 bytes left [ 20.238105] Kernel panic - not syncing: Attempted to kill init! [ 20.241061] Pid: 1, comm: swapper Tainted: G D 2.6.31-rc5-next-20090810 #11 [ 20.243056] Call Trace: [ 20.250062] [<ffffffff8106dd92>] panic+0xb2/0x190 [ 20.252071] [<ffffffff810a90e0>] ? trace_hardirqs_on+0x20/0x40 [ 20.255063] [<ffffffff8150ad9a>] ? _write_unlock_irq+0x3a/0x60 [ 20.256835] [<ffffffff81071cca>] do_exit+0x77a/0x840 [ 20.259061] [<ffffffff8150c15b>] oops_end+0x10b/0x110 [ 20.260016] [<ffffffff8104300a>] no_context+0x17a/0x280 [ 20.261016] [<ffffffff810438cc>] __bad_area_nosemaphore+0x10c/0x1f0 [ 20.265063] [<ffffffff810a4a62>] ? find_usage_backwards+0x32/0x50 [ 20.267059] [<ffffffff81043ae1>] bad_area_nosemaphore+0x21/0x40 [ 20.272067] [<ffffffff8150df4e>] do_page_fault+0x27e/0x3e0 [ 20.274059] [<ffffffff81509cbe>] ? trace_hardirqs_off_thunk+0x3a/0x3c [ 20.276062] [<ffffffff8150b195>] page_fault+0x25/0x30 [ 20.279059] [<ffffffff810522b0>] ? task_rq_lock+0x50/0xc0 [ 20.281422] [<ffffffff810522b0>] ? task_rq_lock+0x50/0xc0 [ 20.286063] [<ffffffff817f5e30>] ? migration_init+0x0/0x90 [ 20.289060] [<ffffffff8106058d>] try_to_wake_up+0x4d/0x410 [ 20.293063] [<ffffffff817f5e30>] ? migration_init+0x0/0x90 [ 20.294059] [<ffffffff810609f3>] wake_up_process+0x23/0x40 [ 20.295016] [<ffffffff8108e25b>] kthread_create+0x9b/0x180 [ 20.297062] [<ffffffff81065930>] ? migration_thread+0x0/0x380 [ 20.298016] [<ffffffff817f3920>] ? kmemcheck_init+0x0/0x90 [ 20.302058] [<ffffffff8106f779>] ? printk+0x79/0xa0 [ 20.306063] [<ffffffff81503aa5>] migration_call+0x255/0x650 [ 20.307430] [<ffffffff817f5e30>] ? migration_init+0x0/0x90 [ 20.312060] [<ffffffff817f5e67>] migration_init+0x37/0x90 [ 20.314059] [<ffffffff817f396d>] ? kmemcheck_init+0x4d/0x90 [ 20.317953] [<ffffffff8100a07b>] do_one_initcall+0x4b/0x1b0 [ 20.318016] [<ffffffff817e5f04>] ? native_smp_prepare_cpus+0x384/0x4e0 [ 20.319059] [<ffffffff817d4140>] ? early_idt_handler+0x0/0x71 [ 20.323062] [<ffffffff817d514c>] kernel_init+0xec/0x2e0 [ 20.326062] [<ffffffff810152aa>] child_rip+0xa/0x20 [ 20.327016] [<ffffffff81014c10>] ? restore_args+0x0/0x30 [ 20.328059] [<ffffffff817d5060>] ? kernel_init+0x0/0x2e0 [ 20.331062] [<ffffffff810152a0>] ? child_rip+0x0/0x20 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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