Public bug reported:
* Install cu
* exec "cu -l ttyS0 -s 115200"
* CTRL-C
* Then exec "tail -f /dev/ttyS0"
/// from kern.log /////
May 4 14:44:43 sobriux kernel: [ 73.842086] BUG: unable to handle kernel
NULL pointer dereference at 00000000000000e0
May 4 14:44:43 sobriux kernel: [ 73.842153] IP: [<ffffffff813a101d>]
uart_dtr_rts+0x9d/0x180
May 4 14:44:43 sobriux kernel: [ 73.842199] PGD 1709d6067 PUD 173b0c067 PMD
0
May 4 14:44:43 sobriux kernel: [ 73.842238] Oops: 0000 [#1] SMP
May 4 14:44:43 sobriux kernel: [ 73.842265] last sysfs file:
/sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_map
May 4 14:44:43 sobriux kernel: [ 73.842319] CPU 0
May 4 14:44:43 sobriux kernel: [ 73.842333] Modules linked in: binfmt_misc
vboxnetadp vboxnetflt vboxdrv nls_iso8859_1 nls_cp437 vfat fat snd_cmipci
gameport snd_pcm snd_page_alloc snd_opl3_lib snd_hwdep snd_mpu401_uart
snd_seq_midi snd_rawmidi snd_seq_midi_event radeon usblp snd_seq ppdev
snd_timer snd_seq_device snd edac_core ttm drm_kms_helper soundcore drm k8temp
edac_mce_amd sp5100_tco i2c_algo_bit asus_atk0110 i2c_piix4 parport_pc shpchp
lp parport usbhid hid firewire_ohci firewire_core ahci floppy crc_itu_t 3c59x
r8169 libahci pata_atiixp
May 4 14:44:43 sobriux kernel: [ 73.843777]
May 4 14:44:43 sobriux kernel: [ 73.844800] Pid: 1812, comm: tail Not
tainted 2.6.38-8-generic #42-Ubuntu System manufacturer System Product
Name/M2A-VM HDMI
May 4 14:44:43 sobriux kernel: [ 73.846994] RIP: 0010:[<ffffffff813a101d>]
[<ffffffff813a101d>] uart_dtr_rts+0x9d/0x180
May 4 14:44:43 sobriux kernel: [ 73.848167] RSP: 0018:ffff8801709cbae8
EFLAGS: 00010286
May 4 14:44:43 sobriux kernel: [ 73.849333] RAX: ffffffff81a670a0 RBX:
ffff880191a58000 RCX: 0000000000000000
May 4 14:44:43 sobriux kernel: [ 73.850513] RDX: 00000000ffffffff RSI:
0000000000000282 RDI: 0000000000000282
May 4 14:44:43 sobriux kernel: [ 73.851689] RBP: ffff8801709cbb08 R08:
ffff8801709ca000 R09: 0000000000000000
May 4 14:44:43 sobriux kernel: [ 73.852064] R10: 0000000000000000 R11:
0000000000000001 R12: ffffffff81ceef60
May 4 14:44:43 sobriux kernel: [ 73.852064] R13: 0000000000000000 R14:
ffff880191a58020 R15: ffff8801917a5b80
May 4 14:44:43 sobriux kernel: [ 73.852064] FS: 00007f36d6379720(0000)
GS:ffff8800d7c00000(0000) knlGS:0000000000000000
May 4 14:44:43 sobriux kernel: [ 73.852064] CS: 0010 DS: 0000 ES: 0000 CR0:
000000008005003b
May 4 14:44:43 sobriux kernel: [ 73.852064] CR2: 00000000000000e0 CR3:
0000000173a66000 CR4: 00000000000006f0
May 4 14:44:43 sobriux kernel: [ 73.852064] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
May 4 14:44:43 sobriux kernel: [ 73.852064] DR3: 0000000000000000 DR6:
00000000ffff0ff0 DR7: 0000000000000400
May 4 14:44:43 sobriux kernel: [ 73.852064] Process tail (pid: 1812,
threadinfo ffff8801709ca000, task ffff8801917a5b80)
May 4 14:44:43 sobriux kernel: [ 73.852064] Stack:
May 4 14:44:43 sobriux kernel: [ 73.852064] ffff8801709cbb08
ffff880191a58000 ffff880186ebd180 ffff880192321800
May 4 14:44:43 sobriux kernel: [ 73.852064] ffff8801709cbbb8
ffffffff8138a7b1 ffff880191a58010 00000000709cbb38
May 4 14:44:43 sobriux kernel: [ 73.852064] 0000000000000286
ffffffff81ceef60 ffff880191a58000 0000000000000000
May 4 14:44:43 sobriux kernel: [ 73.852064] Call Trace:
May 4 14:44:43 sobriux kernel: [ 73.852064] [<ffffffff8138a7b1>]
tty_port_block_til_ready+0x1b1/0x320
May 4 14:44:43 sobriux kernel: [ 73.852064] [<ffffffff81087f30>] ?
autoremove_wake_function+0x0/0x40
May 4 14:44:43 sobriux kernel: [ 73.852064] [<ffffffff8139e210>]
uart_open+0x160/0x1f0
May 4 14:44:43 sobriux kernel: [ 73.852064] [<ffffffff81382bed>]
tty_open+0x19d/0x4c0
May 4May 4 14:46:03 sobriux kernel: imklog 4.6.4, log source = /proc/kmsg
started.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic 2.6.38-8.42
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: matias 1752 F.... pulseaudio
/dev/snd/pcmC0D0p: matias 1752 F...m pulseaudio
CRDA: Error: [Errno 2] No existe el fichero o el directorio
Card0.Amixer.info:
Card hw:0 'CMI8738'/'C-Media CMI8738 (model 55) at 0xcc00, irq 21'
Mixer name : 'CMedia PCI'
Components : ''
Controls : 41
Simple ctrls : 22
Date: Thu May 5 01:57:55 2011
HibernationDevice: RESUME=UUID=fa76dcbc-74cd-47a0-8af6-21603c48e254
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: System manufacturer System Product Name
ProcEnviron:
LANGUAGE=es_AR:en
LANG=es_AR.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic
root=UUID=7c513740-cd30-45d8-a472-609952c20cf8 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-2.6.38-8-generic N/A
linux-backports-modules-2.6.38-8-generic N/A
linux-firmware 1.52
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/17/2008
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: ASUS M2A-VM HDMI ACPI BIOS Revision 1803
dmi.board.name: M2A-VM HDMI
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: 1.XX
dmi.chassis.asset.tag: 123456789000
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnPhoenixTechnologies,LTD:bvrASUSM2A-VMHDMIACPIBIOSRevision1803:bd06/17/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM2A-VMHDMI:rvr1.XX:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug m2a natty serial
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https://bugs.launchpad.net/bugs/777582
Title:
System crash with serial port use
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