2.6.21-rc4: NULL pointer dereference oops when unplugging sierra device

[Jeremy Fitzhardinge <jeremy@goop.org>]

[-- Attachment #1: Type: text/plain, Size: 3168 bytes --]

My laptop has a built-in Sierra wireless device.  When I flicked the
switch to disable it, which effectively unplugs the USB device, I got
this oops:

sierra3 ttyUSB0: Sierra USB modem (3 port) converter now disconnected from ttyUSB0
PM: Removing info for usb-serial:ttyUSB0
PM: Removing info for No Bus:ttyUSB1
sierra3 ttyUSB1: Sierra USB modem (3 port) converter now disconnected from ttyUSB1
PM: Removing info for usb-serial:ttyUSB1
PM: Removing info for No Bus:ttyUSB2
sierra3 ttyUSB2: Sierra USB modem (3 port) converter now disconnected from ttyUSB2
PM: Removing info for usb-serial:ttyUSB2
BUG: unable to handle kernel NULL pointer dereference at virtual address 0000018c
 printing eip:
f8e52cd7
*pde = 34187001
Oops: 0000 [#1]
SMP 
Modules linked in: ppp_deflate zlib_deflate ppp_async crc_ccitt ppp_generic slhc sierra usbserial i915 drm
 autofs4 hidp rfcomm l2cap bluetooth xt_tcpudp iptable_filter ip_tables x_tables vfat fat video ibm_acpi p
arport_pc lp parport snd_hda_intel snd_hda_codec snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_
seq_device snd_pcm_oss wlan_scan_sta snd_mixer_oss snd_pcm ath_rate_sample ath_pci mmc_block wlan sdhci sn
d_timer pcspkr e1000 snd soundcore sg ohci1394 ath_hal mmc_core snd_page_alloc ieee1394 rtc_cmos rtc_core 
serio_raw rtc_lib rtc ehci_hcd uhci_hcd
CPU:    0
EIP:    0060:[<f8e52cd7>]    Not tainted VLI
EFLAGS: 00010246   (2.6.21-rc4 #126)
EIP is at sierra_shutdown+0x3a/0x113 [sierra]
eax: 00000000   ebx: 00000000   ecx: 00000000   edx: f8e52c9d
esi: 00000000   edi: e889fa1c   ebp: e84c0e2c   esp: e84c0e0c
ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
Process pppd (pid: 3847, ti=e84c0000 task=e8553550 task.ti=e84c0000)
Stack: 00000002 e84c0e18 c01cfda8 e84c0e20 c0240431 e889fa1c 00000003 e8a79d00 
       e84c0e50 f8e219e4 f8e5212d 00000021 00000000 00000000 00000000 e889fa50 
       f8e21956 e84c0e70 c01d099a e84c0e78 f8e52c58 e84c0e6c f6c5576c f6c55760 
Call Trace:
 [<c0104e98>] show_trace_log_lvl+0x1a/0x2f
 [<c0104f4a>] show_stack_log_lvl+0x9d/0xa5
 [<c0105114>] show_registers+0x1c2/0x293
 [<c0105307>] die+0x122/0x224
 [<c030fe69>] do_page_fault+0x505/0x5e1
 [<c030e5c4>] error_code+0x7c/0x84
 [<f8e219e4>] destroy_serial+0x8e/0x124 [usbserial]
 [<c01d099a>] kref_put+0x63/0x71
 [<f8e217f0>] usb_serial_put+0x10/0x12 [usbserial]
 [<f8e2194e>] serial_close+0xb6/0xbe [usbserial]
 [<c0225290>] release_dev+0x1f0/0x5f9
 [<c02256ab>] tty_release+0x12/0x1c
 [<c0167cf2>] __fput+0xb8/0x162
 [<c0167db3>] fput+0x17/0x19
 [<c016591c>] filp_close+0x54/0x5c
 [<c01668cd>] sys_close+0x63/0x97
 [<c0103f04>] syscall_call+0x7/0xb
 =======================
Code: e5 f8 00 74 1c c7 44 24 08 97 2e e5 f8 c7 44 24 04 06 2f e5 f8 c7 04 24 22 2f e5 f8 e8 47 ff 2c c7 3
1 f6 eb 4c 8b 44 b7 14 31 db <8b> 80 8c 01 00 00 89 45 ec 8b 55 ec 8b 04 9a 85 c0 74 0b 83 78 
EIP: [<f8e52cd7>] sierra_shutdown+0x3a/0x113 [sierra] SS:ESP 0068:e84c0e0c


This was compiled from git change
0a14fe6e5efd0af0f9c6c01e0433445d615d0110.  .config attached.  The
hardware is a Lenovo ThinkPad X60, with the integrated Verizon Sierra
wireless modem:

Bus 002 Device 002: ID 1199:0218 Sierra Wireless, Inc. 


Thanks,
    J

[-- Attachment #2: condensed.config --]
[-- Type: text/plain, Size: 20528 bytes --]

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CONFIG_FB_I810_GTF=y
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CONFIG_FB_INTEL_DEBUG=y
CONFIG_FB_INTEL_I2C=y
CONFIG_VGA_CONSOLE=y
CONFIG_VGACON_SOFT_SCROLLBACK=y
CONFIG_VIDEO_SELECT=y
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
CONFIG_LOGO=y
CONFIG_LOGO_LINUX_CLUT224=y
CONFIG_SOUND=m
CONFIG_SND=m
CONFIG_SND_TIMER=m
CONFIG_SND_PCM=m
CONFIG_SND_HWDEP=m
CONFIG_SND_RAWMIDI=m
CONFIG_SND_SEQUENCER=m
CONFIG_SND_SEQ_DUMMY=m
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=m
CONFIG_SND_PCM_OSS=m
CONFIG_SND_PCM_OSS_PLUGINS=y
CONFIG_SND_SEQUENCER_OSS=y
CONFIG_SND_RTCTIMER=m
CONFIG_SND_SEQ_RTCTIMER_DEFAULT=y
CONFIG_SND_DYNAMIC_MINORS=y
CONFIG_SND_VERBOSE_PROCFS=y
CONFIG_SND_MPU401_UART=m
CONFIG_SND_DUMMY=m
CONFIG_SND_VIRMIDI=m
CONFIG_SND_MTPAV=m
CONFIG_SND_MPU401=m
CONFIG_SND_HDA_INTEL=m
CONFIG_SND_HDSP=m
CONFIG_SND_HDSPM=m
CONFIG_HID=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
CONFIG_USB_DEVICEFS=y
CONFIG_USB_EHCI_HCD=m
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_UHCI_HCD=m
CONFIG_USB_ACM=m
CONFIG_USB_PRINTER=m
CONFIG_USB_STORAGE=m
CONFIG_USB_STORAGE_DATAFAB=y
CONFIG_USB_STORAGE_FREECOM=y
CONFIG_USB_STORAGE_DPCM=y
CONFIG_USB_STORAGE_USBAT=y
CONFIG_USB_STORAGE_SDDR09=y
CONFIG_USB_STORAGE_SDDR55=y
CONFIG_USB_STORAGE_JUMPSHOT=y
CONFIG_USB_STORAGE_ALAUDA=y
CONFIG_USB_LIBUSUAL=y
CONFIG_USB_HID=y
CONFIG_HID_FF=y
CONFIG_HID_PID=y
CONFIG_LOGITECH_FF=y
CONFIG_THRUSTMASTER_FF=y
CONFIG_USB_HIDDEV=y
CONFIG_USB_AIPTEK=m
CONFIG_USB_WACOM=m
CONFIG_USB_ACECAD=m
CONFIG_USB_KBTAB=m
CONFIG_USB_POWERMATE=m
CONFIG_USB_TOUCHSCREEN=m
CONFIG_USB_TOUCHSCREEN_EGALAX=y
CONFIG_USB_TOUCHSCREEN_PANJIT=y
CONFIG_USB_TOUCHSCREEN_3M=y
CONFIG_USB_TOUCHSCREEN_ITM=y
CONFIG_USB_TOUCHSCREEN_ETURBO=y
CONFIG_USB_TOUCHSCREEN_GUNZE=y
CONFIG_USB_TOUCHSCREEN_DMC_TSC10=y
CONFIG_USB_XPAD=m
CONFIG_USB_ATI_REMOTE=m
CONFIG_USB_ATI_REMOTE2=m
CONFIG_USB_KEYSPAN_REMOTE=m
CONFIG_USB_APPLETOUCH=m
CONFIG_USB_MDC800=m
CONFIG_USB_MICROTEK=m
CONFIG_USB_CATC=m
CONFIG_USB_KAWETH=m
CONFIG_USB_PEGASUS=m
CONFIG_USB_RTL8150=m
CONFIG_USB_USBNET_MII=m
CONFIG_USB_USBNET=m
CONFIG_USB_NET_AX8817X=m
CONFIG_USB_NET_CDCETHER=m
CONFIG_USB_NET_GL620A=m
CONFIG_USB_NET_NET1080=m
CONFIG_USB_NET_PLUSB=m
CONFIG_USB_NET_RNDIS_HOST=m
CONFIG_USB_NET_CDC_SUBSET=m
CONFIG_USB_ALI_M5632=y
CONFIG_USB_AN2720=y
CONFIG_USB_BELKIN=y
CONFIG_USB_ARMLINUX=y
CONFIG_USB_EPSON2888=y
CONFIG_USB_NET_ZAURUS=m
CONFIG_USB_MON=y
CONFIG_USB_USS720=m
CONFIG_USB_SERIAL=m
CONFIG_USB_SERIAL_GENERIC=y
CONFIG_USB_SERIAL_AIRPRIME=m
CONFIG_USB_SERIAL_ARK3116=m
CONFIG_USB_SERIAL_BELKIN=m
CONFIG_USB_SERIAL_WHITEHEAT=m
CONFIG_USB_SERIAL_DIGI_ACCELEPORT=m
CONFIG_USB_SERIAL_CP2101=m
CONFIG_USB_SERIAL_CYPRESS_M8=m
CONFIG_USB_SERIAL_EMPEG=m
CONFIG_USB_SERIAL_FTDI_SIO=m
CONFIG_USB_SERIAL_FUNSOFT=m
CONFIG_USB_SERIAL_VISOR=m
CONFIG_USB_SERIAL_IPAQ=m
CONFIG_USB_SERIAL_IR=m
CONFIG_USB_SERIAL_EDGEPORT=m
CONFIG_USB_SERIAL_EDGEPORT_TI=m
CONFIG_USB_SERIAL_GARMIN=m
CONFIG_USB_SERIAL_IPW=m
CONFIG_USB_SERIAL_KEYSPAN_PDA=m
CONFIG_USB_SERIAL_KEYSPAN=m
CONFIG_USB_SERIAL_KEYSPAN_MPR=y
CONFIG_USB_SERIAL_KEYSPAN_USA28=y
CONFIG_USB_SERIAL_KEYSPAN_USA28X=y
CONFIG_USB_SERIAL_KEYSPAN_USA28XA=y
CONFIG_USB_SERIAL_KEYSPAN_USA28XB=y
CONFIG_USB_SERIAL_KEYSPAN_USA19=y
CONFIG_USB_SERIAL_KEYSPAN_USA18X=y
CONFIG_USB_SERIAL_KEYSPAN_USA19W=y
CONFIG_USB_SERIAL_KEYSPAN_USA19QW=y
CONFIG_USB_SERIAL_KEYSPAN_USA19QI=y
CONFIG_USB_SERIAL_KEYSPAN_USA49W=y
CONFIG_USB_SERIAL_KEYSPAN_USA49WLC=y
CONFIG_USB_SERIAL_KLSI=m
CONFIG_USB_SERIAL_KOBIL_SCT=m
CONFIG_USB_SERIAL_MCT_U232=m
CONFIG_USB_SERIAL_NAVMAN=m
CONFIG_USB_SERIAL_PL2303=m
CONFIG_USB_SERIAL_HP4X=m
CONFIG_USB_SERIAL_SAFE=m
CONFIG_USB_SERIAL_SAFE_PADDED=y
CONFIG_USB_SERIAL_SIERRAWIRELESS=m
CONFIG_USB_SERIAL_TI=m
CONFIG_USB_SERIAL_CYBERJACK=m
CONFIG_USB_SERIAL_XIRCOM=m
CONFIG_USB_SERIAL_OPTION=m
CONFIG_USB_SERIAL_OMNINET=m
CONFIG_USB_EZUSB=y
CONFIG_USB_EMI62=m
CONFIG_USB_EMI26=m
CONFIG_USB_AUERSWALD=m
CONFIG_USB_RIO500=m
CONFIG_USB_LEGOTOWER=m
CONFIG_USB_LCD=m
CONFIG_USB_LED=m
CONFIG_USB_IDMOUSE=m
CONFIG_USB_APPLEDISPLAY=m
CONFIG_USB_SISUSBVGA=m
CONFIG_USB_SISUSBVGA_CON=y
CONFIG_USB_LD=m
CONFIG_USB_TEST=m
CONFIG_MMC=m
CONFIG_MMC_BLOCK=m
CONFIG_MMC_SDHCI=m
CONFIG_RTC_LIB=m
CONFIG_RTC_CLASS=m
CONFIG_RTC_INTF_SYSFS=m
CONFIG_RTC_INTF_PROC=m
CONFIG_RTC_INTF_DEV=m
CONFIG_RTC_INTF_DEV_UIE_EMUL=y
CONFIG_RTC_DRV_CMOS=m
CONFIG_RTC_DRV_X1205=m
CONFIG_RTC_DRV_DS1307=m
CONFIG_RTC_DRV_DS1553=m
CONFIG_RTC_DRV_ISL1208=m
CONFIG_RTC_DRV_DS1672=m
CONFIG_RTC_DRV_DS1742=m
CONFIG_RTC_DRV_PCF8563=m
CONFIG_RTC_DRV_RS5C372=m
CONFIG_RTC_DRV_V3020=m
CONFIG_EXT3_FS=y
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
CONFIG_JBD=y
CONFIG_FS_MBCACHE=y
CONFIG_FS_POSIX_ACL=y
CONFIG_INOTIFY=y
CONFIG_INOTIFY_USER=y
CONFIG_DNOTIFY=y
CONFIG_AUTOFS4_FS=m
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=m
CONFIG_UDF_NLS=y
CONFIG_FAT_FS=m
CONFIG_MSDOS_FS=m
CONFIG_VFAT_FS=m
CONFIG_NTFS_FS=m
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
CONFIG_RAMFS=y
CONFIG_CONFIGFS_FS=m
CONFIG_HFSPLUS_FS=m
CONFIG_NFS_FS=m
CONFIG_NFS_V3=y
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=y
CONFIG_NFS_DIRECTIO=y
CONFIG_NFSD=m
CONFIG_NFSD_V2_ACL=y
CONFIG_NFSD_V3=y
CONFIG_NFSD_V3_ACL=y
CONFIG_NFSD_V4=y
CONFIG_NFSD_TCP=y
CONFIG_LOCKD=m
CONFIG_LOCKD_V4=y
CONFIG_EXPORTFS=m
CONFIG_NFS_ACL_SUPPORT=m
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=m
CONFIG_SUNRPC_GSS=m
CONFIG_RPCSEC_GSS_KRB5=m
CONFIG_PARTITION_ADVANCED=y
CONFIG_MAC_PARTITION=y
CONFIG_MSDOS_PARTITION=y
CONFIG_LDM_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_CODEPAGE_737=m
CONFIG_NLS_CODEPAGE_775=m
CONFIG_NLS_CODEPAGE_850=m
CONFIG_NLS_CODEPAGE_852=m
CONFIG_NLS_CODEPAGE_855=m
CONFIG_NLS_CODEPAGE_857=m
CONFIG_NLS_CODEPAGE_860=m
CONFIG_NLS_CODEPAGE_861=m
CONFIG_NLS_CODEPAGE_862=m
CONFIG_NLS_CODEPAGE_863=m
CONFIG_NLS_CODEPAGE_864=m
CONFIG_NLS_CODEPAGE_865=m
CONFIG_NLS_CODEPAGE_866=m
CONFIG_NLS_CODEPAGE_869=m
CONFIG_NLS_CODEPAGE_936=m
CONFIG_NLS_CODEPAGE_950=m
CONFIG_NLS_CODEPAGE_932=m
CONFIG_NLS_CODEPAGE_949=m
CONFIG_NLS_CODEPAGE_874=m
CONFIG_NLS_ISO8859_8=m
CONFIG_NLS_CODEPAGE_1250=m
CONFIG_NLS_CODEPAGE_1251=m
CONFIG_NLS_ASCII=y
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
CONFIG_NLS_ISO8859_3=m
CONFIG_NLS_ISO8859_4=m
CONFIG_NLS_ISO8859_5=m
CONFIG_NLS_ISO8859_6=m
CONFIG_NLS_ISO8859_7=m
CONFIG_NLS_ISO8859_9=m
CONFIG_NLS_ISO8859_13=m
CONFIG_NLS_ISO8859_14=m
CONFIG_NLS_ISO8859_15=m
CONFIG_NLS_KOI8_R=m
CONFIG_NLS_KOI8_U=m
CONFIG_NLS_UTF8=m
CONFIG_PROFILING=y
CONFIG_OPROFILE=m
CONFIG_KPROBES=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_FS=y
CONFIG_DEBUG_KERNEL=y
CONFIG_DETECT_SOFTLOCKUP=y
CONFIG_SCHEDSTATS=y
CONFIG_TIMER_STATS=y
CONFIG_DEBUG_SLAB=y
CONFIG_DEBUG_SLAB_LEAK=y
CONFIG_DEBUG_RT_MUTEXES=y
CONFIG_DEBUG_PI_LIST=y
CONFIG_DEBUG_SPINLOCK_SLEEP=y
CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_VM=y
CONFIG_FRAME_POINTER=y
CONFIG_EARLY_PRINTK=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_DEBUG_STACK_USAGE=y
CONFIG_DEBUG_RODATA=y
CONFIG_4KSTACKS=y
CONFIG_X86_FIND_SMP_CONFIG=y
CONFIG_X86_MPPARSE=y
CONFIG_DOUBLEFAULT=y
CONFIG_DEBUG_PARAVIRT=y
CONFIG_KEYS=y
CONFIG_SECURITY=y
CONFIG_SECURITY_NETWORK=y
CONFIG_SECURITY_NETWORK_XFRM=y
CONFIG_SECURITY_CAPABILITIES=y
CONFIG_CRYPTO=y
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_BLKCIPHER=m
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_HMAC=y
CONFIG_CRYPTO_NULL=m
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MD5=m
CONFIG_CRYPTO_SHA1=y
CONFIG_CRYPTO_SHA256=m
CONFIG_CRYPTO_SHA512=m
CONFIG_CRYPTO_WP512=m
CONFIG_CRYPTO_TGR192=m
CONFIG_CRYPTO_ECB=m
CONFIG_CRYPTO_CBC=m
CONFIG_CRYPTO_PCBC=m
CONFIG_CRYPTO_DES=m
CONFIG_CRYPTO_BLOWFISH=m
CONFIG_CRYPTO_TWOFISH=m
CONFIG_CRYPTO_TWOFISH_COMMON=m
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_AES=m
CONFIG_CRYPTO_AES_586=m
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_TEA=m
CONFIG_CRYPTO_ARC4=m
CONFIG_CRYPTO_KHAZAD=m
CONFIG_CRYPTO_ANUBIS=m
CONFIG_CRYPTO_DEFLATE=m
CONFIG_CRYPTO_MICHAEL_MIC=m
CONFIG_CRYPTO_CRC32C=m
CONFIG_BITREVERSE=y
CONFIG_CRC_CCITT=m
CONFIG_CRC16=m
CONFIG_CRC32=y
CONFIG_LIBCRC32C=m
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=m
CONFIG_TEXTSEARCH=y
CONFIG_TEXTSEARCH_KMP=m
CONFIG_TEXTSEARCH_BM=m
CONFIG_TEXTSEARCH_FSM=m
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_X86_SMP=y
CONFIG_X86_HT=y
CONFIG_X86_BIOS_REBOOT=y
CONFIG_X86_TRAMPOLINE=y
CONFIG_KTIME_SCALAR=y