kern/125637: src/sys/kern/uipc_sockbuf.c,
v 1.171.2.3 causing kernel panic
alex
no at spam.thx
Tue Jul 15 14:20:01 UTC 2008
>Number: 125637
>Category: kern
>Synopsis: src/sys/kern/uipc_sockbuf.c,v 1.171.2.3 causing kernel panic
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Jul 15 14:20:00 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator: alex
>Release: FreeBSD 7.0-STABLE i386
>Organization:
>Environment:
FreeBSD moshnroll 7.0-STABLE FreeBSD 7.0-STABLE #0: Mon Jun 30 12:40:54 CEST 2008 root at moshnroll:/usr/obj/usr/src/sys/ARUNDEL i386
>Description:
FreeBSD panics every now and then. I don't know which app is causing the panic. I've attached a backtrace, my kernel config and dmesg (although no output concering the panic is being output to it).
Cheers
alex
--- crash begins here ---
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
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This GDB was configured as "i386-marcel-freebsd"...
Unread portion of the kernel message buffer:
panic: sbdrop
cpuid = 1
Syncing disks, vnodes remaining...3 Syncing disks, buffers remaining... 7154 7153 7152 7152 7152 7152 7152 7152 7152 7152 7152 7152 7152 7152 7152 7152 7152 7152 7152 7152 7152 7152
Giving up on 7152 buffers
Uptime: 1d19h37m25s
Physical memory: 2034 MB
Dumping 257 MB: 242 226 210 194 178 162 146 130 114 98 82 66 50 34 18 2
Reading symbols from /boot/kernel/cd9660.ko...Reading symbols from /boot/kernel/cd9660.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/cd9660.ko
Reading symbols from /boot/kernel/linprocfs.ko...Reading symbols from /boot/kernel/linprocfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linprocfs.ko
Reading symbols from /boot/kernel/pseudofs.ko...Reading symbols from /boot/kernel/pseudofs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/pseudofs.ko
Reading symbols from /boot/kernel/linux.ko...Reading symbols from /boot/kernel/linux.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /boot/kernel/procfs.ko...Reading symbols from /boot/kernel/procfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/procfs.ko
Reading symbols from /boot/kernel/sound.ko...Reading symbols from /boot/kernel/sound.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/sound.ko
Reading symbols from /boot/kernel/snd_hda.ko...Reading symbols from /boot/kernel/snd_hda.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/snd_hda.ko
Reading symbols from /boot/kernel/ums.ko...Reading symbols from /boot/kernel/ums.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ums.ko
Reading symbols from /boot/kernel/umass.ko...Reading symbols from /boot/kernel/umass.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/umass.ko
Reading symbols from /boot/kernel/cam.ko...Reading symbols from /boot/kernel/cam.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/cam.ko
Reading symbols from /boot/kernel/random.ko...Reading symbols from /boot/kernel/random.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/random.ko
Reading symbols from /boot/modules/nvidia.ko...done.
Loaded symbols for /boot/modules/nvidia.ko
Reading symbols from /boot/kernel/wlan_wep.ko...Reading symbols from /boot/kernel/wlan_wep.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/wlan_wep.ko
Reading symbols from /boot/kernel/wlan_scan_sta.ko...Reading symbols from /boot/kernel/wlan_scan_sta.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/wlan_scan_sta.ko
Reading symbols from /boot/kernel/ng_ubt.ko...Reading symbols from /boot/kernel/ng_ubt.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_ubt.ko
Reading symbols from /boot/kernel/netgraph.ko...Reading symbols from /boot/kernel/netgraph.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/netgraph.ko
Reading symbols from /boot/kernel/atapicam.ko...Reading symbols from /boot/kernel/atapicam.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/atapicam.ko
Reading symbols from /boot/kernel/acpi.ko...Reading symbols from /boot/kernel/acpi.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/acpi.ko
Reading symbols from /boot/kernel/ng_bluetooth.ko...Reading symbols from /boot/kernel/ng_bluetooth.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_bluetooth.ko
Reading symbols from /boot/kernel/ng_hci.ko...Reading symbols from /boot/kernel/ng_hci.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_hci.ko
Reading symbols from /boot/kernel/ng_l2cap.ko...Reading symbols from /boot/kernel/ng_l2cap.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_l2cap.ko
Reading symbols from /boot/kernel/ng_btsocket.ko...Reading symbols from /boot/kernel/ng_btsocket.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_btsocket.ko
Reading symbols from /boot/kernel/ng_socket.ko...Reading symbols from /boot/kernel/ng_socket.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_socket.ko
#0 doadump () at pcpu.h:195
in pcpu.h
(kgdb) bt
#0 doadump () at pcpu.h:195
#1 0xc04ddff6 in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:418
#2 0xc04de2f6 in panic (fmt=) at /usr/src/sys/kern/kern_shutdown.c:572
#3 0xc053012b in sbdrop_internal (sb=0xca153a24, len=2069)
at /usr/src/sys/kern/uipc_sockbuf.c:848
#4 0xc053031e in sbdrop_locked (sb=0xca153a24, len=2800)
at /usr/src/sys/kern/uipc_sockbuf.c:898
#5 0xc05ac807 in tcp_do_segment (m=0xc6360d00, th=0xc7694838, so=0xca153948, tp=0xca1371d0,
drop_hdrlen=52, tlen=0) at /usr/src/sys/netinet/tcp_input.c:2031
#6 0xc05adbbf in tcp_input (m=0xc6360d00, off0=20) at /usr/src/sys/netinet/tcp_input.c:845
#7 0xc05a5798 in ip_input (m=0xc6360d00) at /usr/src/sys/netinet/ip_input.c:665
#8 0xc05748d5 in netisr_dispatch (num=2, m=0xc6360d00) at /usr/src/sys/net/netisr.c:185
#9 0xc057367a in ether_demux (ifp=0xc528a000, m=0xc6360d00)
at /usr/src/sys/net/if_ethersubr.c:834
#10 0xc0573a73 in ether_input (ifp=0xc528a000, m=0xc6360d00)
at /usr/src/sys/net/if_ethersubr.c:692
#11 0xc05825dd in ieee80211_deliver_data (ic=0xc528e22c, ni=0xc566b000, m=0xc6360d00)
at /usr/src/sys/net80211/ieee80211_input.c:779
#12 0xc0587cdc in ieee80211_input (ic=0xc528e22c, m=0xc6360d00, ni=0xc566b000, rssi=31,
noise=-98, rstamp=23523) at /usr/src/sys/net80211/ieee80211_input.c:519
#13 0xc0457bdd in ath_rx_proc (arg=0xc528e000, npending=1)
at /usr/src/sys/dev/ath/if_ath.c:3673
#14 0xc05111f5 in taskqueue_run (queue=0xc5288080) at /usr/src/sys/kern/subr_taskqueue.c:255
#15 0xc05113fb in taskqueue_thread_loop (arg=0xc528f674)
at /usr/src/sys/kern/subr_taskqueue.c:374
#16 0xc04bbf49 in fork_exit (callout=0xc0511340 <taskqueue_thread_loop>, arg=0xc528f674,
frame=0xe4211d38) at /usr/src/sys/kern/kern_fork.c:783
#17 0xc063e4a0 in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:205
(kgdb) q
--- crash ends here ---
--- kern_conf begins here ---
cpu I686_CPU
ident ARUNDEL
maxusers 10
makeoptions DEBUG=-g
makeoptions CONF_CFLAGS=-fno-builtin
options MPTABLE_FORCE_HTT # Enable HTT CPUs with the MP Table
options CPU_SUSP_HLT
options CPU_UPGRADE_HW_CACHE
options CPU_FASTER_5X86_FPU
options ATA_STATIC_ID
#options MSDOSFS
#options CD9660
#options USB_DEBUG
#options TCP_DROP_SYNFIN #drop TCP packets with SYN+FIN
#options HZ=100
options PREEMPTION
options IPI_PREEMPTION
#options SCHED_4BSD #4BSD scheduler
options SCHED_ULE
options INET #InterNETworking
options FFS #Berkeley Fast Filesystem
options SOFTUPDATES #Enable FFS soft updates support
options UFS_DIRHASH #Improve performance on big directories
options COMPAT_43 #Compatible with BSD 4.3 [KEEP THIS!]
options COMPAT_43TTY #Compatible with BSD 4.3 [KEEP THIS!]
options COMPAT_FREEBSD4 #Compatible with FreeBSD4
options COMPAT_FREEBSD5 #Compatible with FreeBSD5
options COMPAT_FREEBSD6 #Compatible with FreeBSD6
options SC_HISTORY_SIZE=1000 #number of history buffer lines
options KDB #Compile with kernel debugger related code
options KDB_TRACE #Print a stack trace of the current thread on the console for a panic.
options KTRACE #ktrace(1) support
options SYSVSHM #SYSV-style shared memory
options SYSVMSG #SYSV-style message queues
options SYSVSEM #SYSV-style semaphores
options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
options KBD_INSTALL_CDEV #install a CDEV entry in /dev
options UKBD_DFLT_KEYMAP #specify the built-in keymap
makeoptions UKBD_DFLT_KEYMAP="german.iso"
options AUTO_EOI_1
options AUTO_EOI_2
options ADAPTIVE_GIANT # Giant mutex is adaptive.
options STOP_NMI # Stop CPUS using NMI instead of IPI
options SMP # Symmetric MultiProcessor Kernel
device apic # I/O APIC
#devices
device eisa
device pci
device ata
device atadisk
device atapicd
device usb
device uhci
device ehci
device vga
device sc
device ukbd
device ulpt
device ath
device ath_hal
device ath_rate_sample
device wlan
device cpufreq
device coretemp
#pseudo devices
device loop
device ether
device pty
--- kern_conf ends here ---
--- dmesg begins here ---
Copyright (c) 1992-2008 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 7.0-STABLE #0: Mon Jun 30 12:40:54 CEST 2008
root at moshnroll:/usr/obj/usr/src/sys/ARUNDEL
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) Dual CPU E2160 @ 1.80GHz (1800.01-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x6fd Stepping = 13
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0xe39d<SSE3,RSVD2,MON,DS_CPL,EST,TM2,SSSE3,CX16,xTPR,PDCM>
AMD Features=0x20100000<NX,LM>
AMD Features2=0x1<LAHF>
Cores per package: 2
real memory = 2146304000 (2046 MB)
avail memory = 2090729472 (1993 MB)
ACPI APIC Table: <GBT GBTUACPI>
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
cpu0 (BSP): APIC ID: 0
cpu1 (AP): APIC ID: 1
ioapic0: Changing APIC ID to 2
ioapic0 <Version 2.0> irqs 0-23 on motherboard
ath_hal: 0.9.20.3 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
acpi0: <GBT GBTUACPI> on motherboard
acpi0: [ITHREAD]
acpi0: Power Button (fixed)
acpi0: reservation of 0, a0000 (3) failed
acpi0: reservation of 100000, 7fde0000 (3) failed
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
acpi_hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
Timecounter "HPET" frequency 14318180 Hz quality 900
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <PCI-PCI bridge> irq 16 at device 1.0 on pci0
pci1: <PCI bus> on pcib1
vgapci0: <VGA-compatible display> port 0xb000-0xb07f mem 0xf6000000-0xf6ffffff,0xe0000000-0xefffffff,0xf4000000-0xf5ffffff irq 16 at device 0.0 on pci1
nvidia0: <GeForce 9600 GT> on vgapci0
vgapci0: child nvidia0 requested pci_enable_busmaster
vgapci0: child nvidia0 requested pci_enable_io
nvidia0: [GIANT-LOCKED]
nvidia0: [ITHREAD]
uhci0: <UHCI (generic) USB controller> port 0xe100-0xe11f irq 16 at device 26.0 on pci0
uhci0: [GIANT-LOCKED]
uhci0: [ITHREAD]
usb0: <UHCI (generic) USB controller> on uhci0
usb0: USB revision 1.0
uhub0: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb0
uhub0: 2 ports with 2 removable, self powered
uhci1: <UHCI (generic) USB controller> port 0xe200-0xe21f irq 21 at device 26.1 on pci0
uhci1: [GIANT-LOCKED]
uhci1: [ITHREAD]
usb1: <UHCI (generic) USB controller> on uhci1
usb1: USB revision 1.0
uhub1: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb1
uhub1: 2 ports with 2 removable, self powered
uhci2: <UHCI (generic) USB controller> port 0xe000-0xe01f irq 18 at device 26.2 on pci0
uhci2: [GIANT-LOCKED]
uhci2: [ITHREAD]
usb2: <UHCI (generic) USB controller> on uhci2
usb2: USB revision 1.0
uhub2: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb2
uhub2: 2 ports with 2 removable, self powered
ehci0: <EHCI (generic) USB 2.0 controller> mem 0xfa205000-0xfa2053ff irq 18 at device 26.7 on pci0
ehci0: [GIANT-LOCKED]
ehci0: [ITHREAD]
usb3: EHCI version 1.0
usb3: companion controllers, 2 ports each: usb0 usb1 usb2
usb3: <EHCI (generic) USB 2.0 controller> on ehci0
usb3: USB revision 2.0
uhub3: <Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb3
uhub3: 6 ports with 6 removable, self powered
pcm0: <Intel 82801I High Definition Audio Controller> mem 0xfa200000-0xfa203fff irq 22 at device 27.0 on pci0
pcm0: [ITHREAD]
pcib2: <ACPI PCI-PCI bridge> irq 16 at device 28.0 on pci0
pci2: <ACPI PCI bus> on pcib2
pcib3: <ACPI PCI-PCI bridge> irq 19 at device 28.3 on pci0
pci3: <ACPI PCI bus> on pcib3
atapci0: <JMicron JMB363 SATA300 controller> port 0xc000-0xc007,0xc100-0xc103,0xc200-0xc207,0xc300-0xc303,0xc400-0xc40f mem 0xfa000000-0xfa001fff irq 19 at device 0.0 on pci3
atapci0: [ITHREAD]
atapci0: AHCI called from vendor specific driver
atapci0: AHCI Version 01.00 controller with 2 ports detected
ata2: <ATA channel 0> on atapci0
ata2: [ITHREAD]
ata3: <ATA channel 1> on atapci0
ata3: [ITHREAD]
ata4: <ATA channel 2> on atapci0
ata4: [ITHREAD]
pcib4: <ACPI PCI-PCI bridge> irq 16 at device 28.4 on pci0
pci4: <ACPI PCI bus> on pcib4
uhci3: <UHCI (generic) USB controller> port 0xe300-0xe31f irq 23 at device 29.0 on pci0
uhci3: [GIANT-LOCKED]
uhci3: [ITHREAD]
usb4: <UHCI (generic) USB controller> on uhci3
usb4: USB revision 1.0
uhub4: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb4
uhub4: 2 ports with 2 removable, self powered
uhci4: <UHCI (generic) USB controller> port 0xe400-0xe41f irq 19 at device 29.1 on pci0
uhci4: [GIANT-LOCKED]
uhci4: [ITHREAD]
usb5: <UHCI (generic) USB controller> on uhci4
usb5: USB revision 1.0
uhub5: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb5
uhub5: 2 ports with 2 removable, self powered
uhci5: <UHCI (generic) USB controller> port 0xe500-0xe51f irq 18 at device 29.2 on pci0
uhci5: [GIANT-LOCKED]
uhci5: [ITHREAD]
usb6: <UHCI (generic) USB controller> on uhci5
usb6: USB revision 1.0
uhub6: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb6
uhub6: 2 ports with 2 removable, self powered
ehci1: <EHCI (generic) USB 2.0 controller> mem 0xfa204000-0xfa2043ff irq 23 at device 29.7 on pci0
ehci1: [GIANT-LOCKED]
ehci1: [ITHREAD]
usb7: EHCI version 1.0
usb7: companion controllers, 2 ports each: usb4 usb5 usb6
usb7: <EHCI (generic) USB 2.0 controller> on ehci1
usb7: USB revision 2.0
uhub7: <Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb7
uhub7: 6 ports with 6 removable, self powered
pcib5: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci5: <ACPI PCI bus> on pcib5
ath0: <Atheros 5212> mem 0xfa100000-0xfa10ffff irq 18 at device 2.0 on pci5
ath0: [ITHREAD]
ath0: using obsoleted if_watchdog interface
ath0: Ethernet address: 00:0f:b5:82:07:c8
ath0: mac 7.9 phy 4.5 radio 5.6
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci1: <Intel ICH9 SATA300 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xf000-0xf00f,0xfc00-0xfc0f at device 31.2 on pci0
ata0: <ATA channel 0> on atapci1
ata0: [ITHREAD]
ata1: <ATA channel 1> on atapci1
ata1: [ITHREAD]
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
atapci2: <Intel ICH9 SATA300 controller> port 0xe700-0xe707,0xe800-0xe803,0xe900-0xe907,0xea00-0xea03,0xeb00-0xeb0f,0xec00-0xec0f irq 19 at device 31.5 on pci0
atapci2: [ITHREAD]
ata5: <ATA channel 0> on atapci2
ata5: [ITHREAD]
ata6: <ATA channel 1> on atapci2
ata6: [ITHREAD]
cpu0: <ACPI CPU> on acpi0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
est: CPU supports Enhanced Speedstep, but is not recognized.
est: cpu_vendor GenuineIntel, msr 925092506000925
device_attach: est0 attach returned 6
p4tcc0: <CPU Frequency Thermal Control> on cpu0
coretemp0: <CPU On-Die Thermal Sensors> on cpu0
cpu1: <ACPI CPU> on acpi0
est1: <Enhanced SpeedStep Frequency Control> on cpu1
est: CPU supports Enhanced Speedstep, but is not recognized.
est: cpu_vendor GenuineIntel, msr 925092506000925
device_attach: est1 attach returned 6
p4tcc1: <CPU Frequency Thermal Control> on cpu1
coretemp1: <CPU On-Die Thermal Sensors> on cpu1
acpi_button0: <Power Button> on acpi0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
ubt0: <vendor 0x0a12 product 0x0001, class 224/1, rev 2.00/15.93, addr 2> on uhub0
ubt0: Interface 0 endpoints: interrupt=0x81, bulk-in=0x82, bulk-out=0x2
ubt0: Interface 1 (alt.config 5) endpoints: isoc-in=0x83, isoc-out=0x3; wMaxPacketSize=49; nframes=6, buffer size=294
ums0: <Razer Razer 1600dpi Mouse, class 0/0, rev 2.00/21.00, addr 2> on uhub1
ums0: 7 buttons and Z dir.
ukbd0: <Dell Dell USB Keyboard, class 0/0, rev 1.10/3.06, addr 3> on uhub1
kbd0 at ukbd0
Timecounters tick every 1.000 msec
ad0: 238474MB <SAMSUNG SP2504C VT100-50> at ata0-master SATA300
ad8: 6105MB <SAMSUNG SV0644A JC201-12> at ata4-master UDMA33
acd0: DVDR <HL-DT-ST DVDRAM GSA-H10N/JL10> at ata4-slave UDMA33
pcm0: <HDA Codec: Realtek ALC885>
pcm0: <HDA Driver Revision: 20071129_0050>
acd0: FAILURE - INQUIRY ILLEGAL REQUEST asc=0x24 ascq=0x00 sks=0x40 0x00 0x01
acd0: FAILURE - INQUIRY ILLEGAL REQUEST asc=0x24 ascq=0x00 sks=0x40 0x00 0x01
SMP: AP CPU #1 Launched!
cd0 at ata4 bus 0 target 1 lun 0
cd0: <HL-DT-ST DVDRAM GSA-H10N JL10> Removable CD-ROM SCSI-0 device
cd0: 33.000MB/s transfers
cd0: cd present [341391 x 2048 byte records]
Trying to mount root from ufs:/dev/ad8s1a
WARNING: / was not properly dismounted
WARNING: /usr was not properly dismounted
/usr: mount pending error: blocks 4 files 1
WARNING: attempt to net_add_domain(bluetooth) after domainfinalize()
WARNING: attempt to net_add_domain(netgraph) after domainfinalize()
linux: pid 26039 (rm): syscall fstatat64 not implemented
ulpt0: <Samsung Electronics Co., Ltd. Samsung ML-1510_700, class 0/0, rev 1.10/1.00, addr 3> on uhub0
ulpt0: using bi-directional mode
ulpt0: at uhub0 port 2 (addr 3) disconnected
ulpt0: detached
--- dmesg ends here ---
>How-To-Repeat:
Seems to appear randomly.
>Fix:
You tell me.
>Release-Note:
>Audit-Trail:
>Unformatted:
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