Re: Linux 2.6.9-rc2 : oops

Christian Borntraeger
2004-09-13T21:16:22Z

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Linus Torvalds wrote:
> On Mon, 13 Sep 2004, Christian Borntraeger wrote:
> > I got an oops with 2.6.9-rc2 in free_block.
> Looks like somebody is trying to free an invalid address. Sadly, your
> traceback doesn't show _who_, because it's hidden in the buffering.
>
> The only changes to slab itself have been by Christoph lately, I don't
> think that matters. Can you enable slab debugging? That should catch it
> much earlier..

Got it. I can reproduce the problem by mounting one of my recently burned
backup cds.

reversing "[PATCH] Fix leaks in ISOFS."
http://linux.bkbits.net:8080/linux-2.6/cset%40413792bdlE_TiqzIHELio3xcG68QeQ
helps. Seems we need a fix for the fix.

thanks for your help

Christian

slab error in cache_free_debugcheck(): cache `size-256': double free, or
memory outside object was overwritten
[<c0105e87>] dump_stack+0x17/0x20
[<c013ef57>] cache_free_debugcheck+0x197/0x210
[<c013fada>] kfree+0x4a/0x90
[<f3be297f>] parse_rock_ridge_inode_internal+0x1af/0x610 [isofs]
[<f3be2f88>] parse_rock_ridge_inode+0x18/0x50 [isofs]
[<f3be1a9e>] isofs_read_inode+0x24e/0x3f0 [isofs]
[<f3be1cf9>] isofs_iget+0x59/0x70 [isofs]
[<f3be0f68>] isofs_fill_super+0x398/0x620 [isofs]
[<c01595fa>] get_sb_bdev+0xea/0x120
[<f3be1d2c>] isofs_get_sb+0x1c/0x30 [isofs]
[<c015982e>] do_kern_mount+0x8e/0x150
[<c016ea34>] do_new_mount+0x64/0xa0
[<c016f123>] do_mount+0x163/0x1a0
[<c016f4c8>] sys_mount+0x88/0xf0
[<c010504f>] syscall_call+0x7/0xb
....
there is more, see attachement

Christian

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Linux version 2.6.9-rc2 (root@cubus) (gcc-Version 3.3.4 (Debian 1:3.3.4-11)) #2 Mon Sep 13 22:43:26 CEST 2004
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009e800 (usable)
BIOS-e820: 000000000009e800 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 000000002ffec000 (usable)
BIOS-e820: 000000002ffec000 - 000000002ffef000 (ACPI data)
BIOS-e820: 000000002ffef000 - 000000002ffff000 (reserved)
BIOS-e820: 000000002ffff000 - 0000000030000000 (ACPI NVS)
BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
767MB LOWMEM available.
On node 0 totalpages: 196588
DMA zone: 4096 pages, LIFO batch:1
Normal zone: 192492 pages, LIFO batch:16
HighMem zone: 0 pages, LIFO batch:1
DMI 2.3 present.
ACPI: RSDP (v000 ASUS ) @ 0x000f6a70
ACPI: RSDT (v001 ASUS A7V-133 0x30303031 MSFT 0x31313031) @ 0x2ffec000
ACPI: FADT (v001 ASUS A7V-133 0x30303031 MSFT 0x31313031) @ 0x2ffec080
ACPI: BOOT (v001 ASUS A7V-133 0x30303031 MSFT 0x31313031) @ 0x2ffec040
ACPI: DSDT (v001 ASUS A7V-133 0x00001000 MSFT 0x0100000b) @ 0x00000000
ACPI: PM-Timer IO Port: 0xe408
Built 1 zonelists
Kernel command line: BOOT_IMAGE=Linux269rc2 root=901 video=rivafb:1024x768@85
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 65536 bytes)
Detected 1311.697 MHz processor.
Using pmtmr for high-res timesource
Console: colour VGA+ 80x25
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Memory: 774488k/786352k available (2607k kernel code, 11316k reserved, 1113k data, 192k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay loop... 2596.86 BogoMIPS (lpj=1298432)
Security Scaffold v1.0.0 initialized
Capability LSM initialized
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
CPU: After generic identify, caps: 0383fbff c1c3fbff 00000000 00000000
CPU: After vendor identify, caps: 0383fbff c1c3fbff 00000000 00000000
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 64K (64 bytes/line)
CPU: After all inits, caps: 0383fbff c1c3fbff 00000000 00000020
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU: AMD Duron(tm) Processor stepping 01
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
tbxface-0117 [02] acpi_load_tables : ACPI Tables successfully acquired
Parsing all Control Methods:...................................................................................................................
Table [DSDT](id F004) - 356 Objects with 38 Devices 115 Methods 24 Regions
ACPI Namespace successfully loaded at root c050773c
ACPI: IRQ9 SCI: Level Trigger.
evxfevnt-0093 [03] acpi_enable : Transition to ACPI mode successful
NET: Registered protocol family 16
PCI: PCI BIOS revision 2.10 entry at 0xf1180, last bus=1
PCI: Using configuration type 1
mtrr: v2.0 (20020519)
ACPI: Subsystem revision 20040715
evgpeblk-0980 [07] ev_create_gpe_block : GPE 00 to 0F [_GPE] 2 regs at 000000000000E420 on int 0x9
evgpeblk-0989 [07] ev_create_gpe_block : Found 4 Wake, Enabled 0 Runtime GPEs in this block
Completing Region/Field/Buffer/Package initialization:.......................................................
Initialized 23/24 Regions 2/2 Fields 19/19 Buffers 11/14 Packages (365 nodes)
Executing all Device _STA and_INI methods:.........................................
41 Devices found containing: 41 _STA, 0 _INI methods
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 *10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 10 11 12 14 15) *0, disabled.
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 *9 10 11 12 14 15)
ACPI: PCI Root Bridge [PCI0] (00:00)
PCI: Probing PCI hardware (bus 00)
Disabling VIA memory write queue (PCI ID 0305, rev 03): [55] 89 & 1f -> 09
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
Linux Plug and Play Support v0.97 (c) Adam Belay
PnPBIOS: Scanning system for PnP BIOS support...
PnPBIOS: Found PnP BIOS installation structure at 0xc00fc4f0
PnPBIOS: PnP BIOS version 1.0, entry 0xf0000:0xc520, dseg 0xf0000
pnp: 00:12: ioport range 0xe400-0xe47f could not be reserved
pnp: 00:12: ioport range 0xe800-0xe83f could not be reserved
PnPBIOS: 15 nodes reported by PnP BIOS; 15 recorded by driver
PCI: Using ACPI for IRQ routing
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 9
ACPI: PCI interrupt 0000:00:04.2[D] -> GSI 9 (level, low) -> IRQ 9
ACPI: PCI interrupt 0000:00:04.3[D] -> GSI 9 (level, low) -> IRQ 9
ACPI: PCI interrupt 0000:00:09.0[A] -> GSI 9 (level, low) -> IRQ 9
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
ACPI: PCI interrupt 0000:00:0a.0[A] -> GSI 11 (level, low) -> IRQ 11
ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 10
ACPI: PCI interrupt 0000:00:11.0[A] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 11
ACPI: PCI interrupt 0000:01:00.0[A] -> GSI 11 (level, low) -> IRQ 11
spurious 8259A interrupt: IRQ7.
irda_init()
NET: Registered protocol family 23
Simple Boot Flag at 0x3a set to 0x1
Machine check exception polling timer started.
Initializing Cryptographic API
Applying VIA southbridge workaround.
PCI: Disabling Via external APIC routing
ACPI: PCI interrupt 0000:01:00.0[A] -> GSI 11 (level, low) -> IRQ 11
rivafb: nVidia device/chipset 10DE0110
rivafb: nVidia Corporation NV11 [GeForce2 MX/MX 400]
rivafb: Detected CRTC controller 0 being used
rivafb: RIVA MTRR set to ON
rivafb: Found EDID Block from BUS 1
rivafb: setting virtual Y resolution to 32768
rivafb: setting virtual Y resolution to 32768
rivafb: Detected CRTC controller 0 being used
rivafb: Detected CRTC controller 0 being used
Console: switching to colour frame buffer device 128x48
rivafb: PCI nVidia NV11 framebuffer ver 0.9.5b (32MB @ 0xC8000000)
vga16fb: initializing
vga16fb: mapped to 0xc00a0000
fb1: VGA16 VGA frame buffer device
vesafb: probe of vesafb0 failed with error -6
ACPI: Power Button (FF) [PWRF]
ACPI: Processor [CPU0] (supports C1 C2, 16 throttling states)
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
Real Time Clock Driver v1.12
Non-volatile memory driver v1.2
Software Watchdog Timer: 0.07 initialized. soft_noboot=0 soft_margin=60 sec (nowayout= 0)
Linux agpgart interface v0.100 (c) Dave Jones
agpgart: Detected VIA Twister-K/KT133x/KM133 chipset
agpgart: Maximum main memory to use for agp memory: 690M
agpgart: AGP aperture is 256M @ 0xd0000000
Hangcheck: starting hangcheck timer 0.5.0 (tick is 180 seconds, margin is 60 seconds).
irda_register_dongle : registering dongle "MA600" (11).
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: IDE controller at PCI slot 0000:00:04.1
VP_IDE: chipset revision 6
VP_IDE: not 100% native mode: will probe irqs later
VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci0000:00:04.1
ide0: BM-DMA at 0xd800-0xd807, BIOS settings: hda:DMA, hdb:pio
ide1: BM-DMA at 0xd808-0xd80f, BIOS settings: hdc:DMA, hdd:DMA
Probing IDE interface ide0...
hda: SAMSUNG SP1614N, ATA DISK drive
Using anticipatory io scheduler
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Probing IDE interface ide1...
hdc: TOSHIBA DVD-ROM SD-M1502, ATAPI CD/DVD-ROM drive
hdd: SONY CD-RW CRX140E, ATAPI CD/DVD-ROM drive
ide1 at 0x170-0x177,0x376 on irq 15
PDC20265: IDE controller at PCI slot 0000:00:11.0
ACPI: PCI interrupt 0000:00:11.0[A] -> GSI 10 (level, low) -> IRQ 10
PDC20265: chipset revision 2
PDC20265: 100% native mode on irq 10
PDC20265: (U)DMA Burst Bit ENABLED Primary PCI Mode Secondary PCI Mode.
ide2: BM-DMA at 0x8400-0x8407, BIOS settings: hde:pio, hdf:pio
ide3: BM-DMA at 0x8408-0x840f, BIOS settings: hdg:pio, hdh:pio
Probing IDE interface ide2...
hde: WDC WD1200BB-00CAA1, ATA DISK drive
ide2 at 0x9800-0x9807,0x9402 on irq 10
Probing IDE interface ide3...
Probing IDE interface ide3...
Probing IDE interface ide4...
ide4: Wait for ready failed before probe !
Probing IDE interface ide5...
ide5: Wait for ready failed before probe !
hda: max request size: 1024KiB
hda: 312581808 sectors (160041 MB) w/8192KiB Cache, CHS=19457/255/63, UDMA(100)
hda: cache flushes supported
hda: hda1 hda2 hda3 hda4 < hda5 hda6 hda7 >
hde: max request size: 128KiB
hde: 234441648 sectors (120034 MB) w/2048KiB Cache, CHS=65535/16/63, UDMA(100)
hde: cache flushes not supported
hde: hde1 hde2
hdc: ATAPI 48X DVD-ROM drive, 128kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.20
hdd: ATAPI 32X CD-ROM CD-R/RW drive, 4096kB Cache, UDMA(33)
mice: PS/2 mouse device common for all mice
serio: i8042 AUX port at 0x60,0x64 irq 12
serio: i8042 KBD port at 0x60,0x64 irq 1
input: AT Translated Set 2 keyboard on isa0060/serio0
md: linear personality registered as nr 1
md: raid0 personality registered as nr 2
md: raid1 personality registered as nr 3
md: raid5 personality registered as nr 4
raid5: automatically using best checksumming function: pIII_sse
pIII_sse : 3648.000 MB/sec
raid5: using function: pIII_sse (3648.000 MB/sec)
md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
device-mapper: 4.1.0-ioctl (2003-12-10) initialised: dm@uk.sistina.com
Advanced Linux Sound Architecture Driver Version 1.0.6 (Sun Aug 15 07:17:53 2004 UTC).
PCI: Enabling device 0000:00:0a.0 (0004 -> 0005)
ACPI: PCI interrupt 0000:00:0a.0[A] -> GSI 11 (level, low) -> IRQ 11
ALSA device list:
#0: Ensoniq AudioPCI ENS1370 at 0xa000, irq 11
NET: Registered protocol family 2
IP: routing cache hash table of 8192 buckets, 64Kbytes
TCP: Hash tables configured (established 262144 bind 65536)
Initializing IPsec netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 10
IPv6 over IPv4 tunneling driver
NET: Registered protocol family 15
IrCOMM protocol (Dag Brattli)
ACPI: (supports S0 S1 S3 S4 S5)
ACPI wakeup devices:
PWRB PCI0 UAR1 UAR2 USB0 USB1
md: Autodetecting RAID arrays.
md: autorun ...
md: considering hde2 ...
md: adding hde2 ...
md: hde1 has different UUID to hde2
md: adding hda3 ...
md: hda2 has different UUID to hde2
md: created md1
md: bind<hda3>
md: bind<hde2>
md: running: <hde2><hda3>
md1: setting max_sectors to 128, segment boundary to 32767
raid0: looking at hde2
raid0: comparing hde2(107454720) with hde2(107454720)
raid0: END
raid0: ==> UNIQUE
raid0: 1 zones
raid0: looking at hda3
raid0: comparing hda3(107426560) with hde2(107454720)
raid0: NOT EQUAL
raid0: comparing hda3(107426560) with hda3(107426560)
raid0: END
raid0: ==> UNIQUE
raid0: 2 zones
raid0: FINAL 2 zones
raid0: zone 1
raid0: checking hda3 ... nope.
raid0: checking hde2 ... contained as device 0
(107454720) is smallest!.
raid0: zone->nb_dev: 1, size: 28160
raid0: current zone offset: 107454720
raid0: done.
raid0 : md_size is 214881280 blocks.
raid0 : conf->hash_spacing is 214853120 blocks.
raid0 : nb_zone is 2.
raid0 : Allocating 8 bytes for hash.
md: considering hde1 ...
md: adding hde1 ...
md: adding hda2 ...
md: created md0
md: bind<hda2>
md: bind<hde1>
md: running: <hde1><hda2>
raid1: raid set md0 active with 2 out of 2 mirrors
md: ... autorun DONE.
ReiserFS: md1: found reiserfs format "3.6" with standard journal
ReiserFS: md1: using ordered data mode
ReiserFS: md1: journal params: device md1, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30
ReiserFS: md1: checking transaction log (md1)
ReiserFS: md1: Using r5 hash to sort names
VFS: Mounted root (reiserfs filesystem) readonly.
Freeing unused kernel memory: 192k freed
Adding 931728k swap on /dev/hda7. Priority:-1 extents:1
usbcore: registered new driver usbfs
usbcore: registered new driver hub
USB Universal Host Controller Interface driver v2.2
ACPI: PCI interrupt 0000:00:04.2[D] -> GSI 9 (level, low) -> IRQ 9
uhci_hcd 0000:00:04.2: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller
uhci_hcd 0000:00:04.2: irq 9, io base 0000d400
uhci_hcd 0000:00:04.2: new USB bus registered, assigned bus number 1
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
ACPI: PCI interrupt 0000:00:04.3[D] -> GSI 9 (level, low) -> IRQ 9
uhci_hcd 0000:00:04.3: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (#2)
uhci_hcd 0000:00:04.3: irq 9, io base 0000d000
uhci_hcd 0000:00:04.3: new USB bus registered, assigned bus number 2
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing disabled
ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
usb 2-1: new low speed USB device using address 2
ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
usbcore: registered new driver hiddev
input: USB HID v1.00 Mouse [Microsoft Microsoft Wheel Mouse Optical®] on usb-0000:00:04.3-1
usbcore: registered new driver usbhid
drivers/usb/input/hid-core.c: v2.0:USB HID core driver
parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE,EPP]
PCI: Enabling device 0000:00:09.0 (0014 -> 0017)
ACPI: PCI interrupt 0000:00:09.0[A] -> GSI 9 (level, low) -> IRQ 9
3c59x: Donald Becker and others. www.scyld.com/network/vortex.html
0000:00:09.0: 3Com PCI 3c905B Cyclone 100baseTx at 0xa400. Vers LK1.1.19
NET: Registered protocol family 17
i2c /dev entries driver
loop: loaded (max 8 devices)
lp0: using parport0 (interrupt-driven).
cdrom: open failed.
ReiserFS: md0: found reiserfs format "3.6" with standard journal
ReiserFS: md0: using ordered data mode
ReiserFS: md0: journal params: device md0, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30
ReiserFS: md0: checking transaction log (md0)
ReiserFS: md0: Using r5 hash to sort names
NTFS driver 2.1.17 [Flags: R/O MODULE].
NTFS volume version 3.1.
ip_tables: (C) 2000-2002 Netfilter core team
ip_conntrack version 2.1 (6143 buckets, 49144 max) - 332 bytes per conntrack
inserting floppy driver for 2.6.9-rc2
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
input: PC Speaker
SCSI subsystem initialized
Initializing USB Mass Storage driver...
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
rivafb: Detected CRTC controller 0 being used
rivafb: Detected CRTC controller 0 being used
ISO 9660 Extensions: Microsoft Joliet Level 3
ISO 9660 Extensions: RRIP_1991A
slab error in cache_free_debugcheck(): cache `size-256': double free, or memory outside object was overwritten
[<c0105e87>] dump_stack+0x17/0x20
[<c013ef57>] cache_free_debugcheck+0x197/0x210
[<c013fada>] kfree+0x4a/0x90
[<f3be297f>] parse_rock_ridge_inode_internal+0x1af/0x610 [isofs]
[<f3be2f88>] parse_rock_ridge_inode+0x18/0x50 [isofs]
[<f3be1a9e>] isofs_read_inode+0x24e/0x3f0 [isofs]
[<f3be1cf9>] isofs_iget+0x59/0x70 [isofs]
[<f3be0f68>] isofs_fill_super+0x398/0x620 [isofs]
[<c01595fa>] get_sb_bdev+0xea/0x120
[<f3be1d2c>] isofs_get_sb+0x1c/0x30 [isofs]
[<c015982e>] do_kern_mount+0x8e/0x150
[<c016ea34>] do_new_mount+0x64/0xa0
[<c016f123>] do_mount+0x163/0x1a0
[<c016f4c8>] sys_mount+0x88/0xf0
[<c010504f>] syscall_call+0x7/0xb
d2feb144: redzone 1: 0x5a2cf071, redzone 2: 0x5a2cf071.
Slab corruption: start=d2feb148, len=256
Redzone: 0x170fc2a5/0x170fc2a5.
Last user: [<c02e0659>](alloc_skb+0x39/0xd0)
000: 3c 37 3e 53 65 70 20 31 33 20 32 32 3a 35 30 3a
010: 35 34 20 6b 65 72 6e 65 6c 3a 20 49 53 4f 20 39
020: 36 36 30 20 45 78 74 65 6e 73 69 6f 6e 73 3a 20
030: 52 52 49 50 5f 31 39 39 31 41 00 5a 5a 5a 5a 5a
040: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
050: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a
Prev obj: start=d2feb03c, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Next obj: start=d2feb254, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Slab corruption: start=d2feb148, len=256
Redzone: 0x170fc2a5/0x170fc2a5.
Last user: [<c02e0659>](alloc_skb+0x39/0xd0)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Prev obj: start=d2feb03c, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Next obj: start=d2feb254, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Slab corruption: start=d2feb148, len=256
Redzone: 0x170fc2a5/0x170fc2a5.
Last user: [<c02e0659>](alloc_skb+0x39/0xd0)
000: 3c 33 3e 53 65 70 20 31 33 20 32 32 3a 35 30 3a
010: 35 34 20 6b 65 72 6e 65 6c 3a 20 50 72 65 76 20
020: 6f 62 6a 3a 20 73 74 61 72 74 3d 64 32 66 65 62
030: 30 33 63 2c 20 6c 65 6e 3d 32 35 36 00 5a 5a 5a
040: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
050: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a
Prev obj: start=d2feb03c, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Next obj: start=d2feb254, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Slab corruption: start=d2feb148, len=256
Redzone: 0x170fc2a5/0x170fc2a5.
Last user: [<c02e0659>](alloc_skb+0x39/0xd0)
000: 3c 33 3e 53 65 70 20 31 33 20 32 32 3a 35 30 3a
010: 35 34 20 6b 65 72 6e 65 6c 3a 20 52 65 64 7a 6f
020: 6e 65 3a 20 30 78 31 37 30 66 63 32 61 35 2f 30
030: 78 31 37 30 66 63 32 61 35 2e 00 5a 5a 5a 5a 5a
040: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
050: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a
Prev obj: start=d2feb03c, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Next obj: start=d2feb254, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Slab corruption: start=d2feb148, len=256
Redzone: 0x170fc2a5/0x170fc2a5.
Last user: [<c02e0659>](alloc_skb+0x39/0xd0)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Prev obj: start=d2feb03c, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Next obj: start=d2feb254, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Slab corruption: start=d2feb148, len=256
Redzone: 0x170fc2a5/0x170fc2a5.
Last user: [<c02e0659>](alloc_skb+0x39/0xd0)
000: 3c 33 3e 53 65 70 20 31 33 20 32 32 3a 35 30 3a
010: 35 34 20 6b 65 72 6e 65 6c 3a 20 50 72 65 76 20
020: 6f 62 6a 3a 20 73 74 61 72 74 3d 64 32 66 65 62
030: 30 33 63 2c 20 6c 65 6e 3d 32 35 36 00 5a 5a 5a
040: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
050: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a
Prev obj: start=d2feb03c, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Next obj: start=d2feb254, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Slab corruption: start=d2feb148, len=256
Redzone: 0x170fc2a5/0x170fc2a5.
Last user: [<c02e0659>](alloc_skb+0x39/0xd0)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Prev obj: start=d2feb03c, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Next obj: start=d2feb254, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Slab corruption: start=d2feb148, len=256
Redzone: 0x170fc2a5/0x170fc2a5.
Last user: [<c02e0659>](alloc_skb+0x39/0xd0)
000: 3c 33 3e 53 65 70 20 31 33 20 32 32 3a 35 30 3a
010: 35 34 20 6b 65 72 6e 65 6c 3a 20 52 65 64 7a 6f
020: 6e 65 3a 20 30 78 31 37 30 66 63 32 61 35 2f 30
030: 78 31 37 30 66 63 32 61 35 2e 00 5a 5a 5a 5a 5a
040: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
050: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a
Prev obj: start=d2feb03c, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Next obj: start=d2feb254, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Slab corruption: start=d2feb148, len=256
Redzone: 0x170fc2a5/0x170fc2a5.
Last user: [<c02e0659>](alloc_skb+0x39/0xd0)
000: 3c 33 3e 53 65 70 20 31 33 20 32 32 3a 35 30 3a
010: 35 34 20 6b 65 72 6e 65 6c 3a 20 52 65 64 7a 6f
020: 6e 65 3a 20 30 78 31 37 30 66 63 32 61 35 2f 30
030: 78 31 37 30 66 63 32 61 35 2e 00 5a 5a 5a 5a 5a
040: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
050: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a
Prev obj: start=d2feb03c, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Next obj: start=d2feb254, len=256
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c02e07fb>](kfree_skbmem+0xb/0x20)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
slab error in cache_alloc_debugcheck_after(): cache `size-256': double free, or memory outside object was overwritten
[<c0105e87>] dump_stack+0x17/0x20
[<c013f3bc>] cache_alloc_debugcheck_after+0x8c/0x130
[<c013f97f>] <1>Unable to handle kernel paging request at virtual address 5a5a5a5a
printing eip:
c02e0785
*pde = 00000000
Oops: 0000 [#1]
PREEMPT
Modules linked in: isofs usb_storage scsi_mod pcspkr floppy 8250_pnp ipt_state ipt_MASQUERADE iptable_nat ip_conntrack iptable_filter ip_tables vfat fat nls_iso8859_15 ntfs lp loop w83781d i2c_viapro i2c_dev i2c_sensor af_packet nls_cp437 nls_iso8859_1 3c59x joydev parport_pc evdev parport usbhid 8250 serial_core uhci_hcd usbcore
CPU: 0
EIP: 0060:[<c02e0785>] Not tainted VLI
EFLAGS: 00010297 (2.6.9-rc2)
EIP is at skb_release_data+0x35/0xa0
eax: d2feb188 ebx: 00000000 ecx: d2feb188 edx: 5a5a5a5a
esi: e4839b68 edi: ee89dd7c ebp: ee89dd30 esp: ee89dd28
ds: 007b es: 007b ss: 0068
Process syslogd (pid: 3016, threadinfo=ee89c000 task=ee833020)
Stack: e4839b68 e4839b68 ee89dd3c c02e07fb 00000000 ee89dd5c c02e0890 ee89dea0
00000000 e4839b68 ee89df2c e4839b68 ee89df2c ee89dda8 c033361a 00000000
00000000 eee30340 ee89ddb8 eed94584 0000003b 00000bcc 00000000 00000000
Call Trace:
[<c0105e5a>] show_stack+0x7a/0x90
[<c0105fdd>] show_registers+0x14d/0x1b0
[<c01061c4>] die+0xe4/0x170
[<c0116635>] do_page_fault+0x225/0x5ac
[<c0105a59>] error_code+0x2d/0x38
[<c02e07fb>] kfree_skbmem+0xb/0x20
[<c02e0890>] __kfree_skb+0x80/0x100
[<c033361a>] unix_dgram_recvmsg+0x12a/0x1d0
[<c02dce2d>] sock_recvmsg+0xbd/0xe0
[<c02de275>] sys_recvfrom+0x85/0xe0
[<c02de306>] sys_recv+0x36/0x40
[<c02de932>] sys_socketcall+0x142/0x230
[<c010504f>] syscall_call+0x7/0xb
Code: 00 74 0f 8b 80 a0 00 00 00 ff 08 0f 94 c2 84 d2 74 75 8b 8e a0 00 00 00 8b 51 04 89 c8 85 d2 74 35 31 db 39 d3 73 2f 8b 54 d8 10 <8b> 02 f6 c4 08 75 17 8b 42 04 40 74 45 83 42 04 ff 0f 98 c0 84
__kmalloc+0x8f/0xc0
[<c02e0659>] alloc_skb+0x39/0xd0
[<c02df991>] sock_alloc_send_pskb+0xb1/0x1c0
[<c02dfaba>] sock_alloc_send_skb+0x1a/0x20
[<c0333266>] unix_stream_sendmsg+0x156/0x370
[<c02dd081>] sock_aio_write+0xe1/0x100
[<c0152bb1>] do_sync_write+0x91/0xd0
[<c0152cda>] vfs_write+0xea/0x120
[<c0152dc1>] sys_write+0x41/0x70
[<c010504f>] syscall_call+0x7/0xb
d2feb144: redzone 1: 0x170fc2a5, redzone 2: 0x170fc2a5.