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Podrobně byla rozebrána kritická zranitelnost v nf_tables (CVE-2026-23111). Další lokální eskalace práv na Linuxu. V upstreamu byla zranitelnost již v únoru opravena. Ve zdrojovém kódu stačilo odstranit 1 vykřičník.
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Přihlaste svou přednášku na další ročník konference LinuxDays, který proběhne 3. a 4. října na FIT ČVUT v pražských Dejvicích. Příjem témat poběží do konce prázdnin, pak proběhne veřejné hlasování a následně sestavení programu.
Systems Configuration Problems 1 problem.
cdrecord will be run without root privileges
It is highly recommended to configure cdrecord to run with root privileges. Only then cdrecord runs with high priority which increases the overall stability of the burning process. Apart from that it allows changing the size of the used burning buffer. A lot of user problems could be solved this way. This is also true when using SuSE's resmgr.
Running K3b as root user
It is not recommended to run K3b under the root user account. This introduces unnecessary security risks.
Solution: Run K3b from a proper user account and setup the device and external tool permissions appropriately.
Předem díky za odpovědi
martin@linux-desktop:~$ sudo k3b
X Error: BadDevice, invalid or uninitialized input device 169
Major opcode: 147
Minor opcode: 3
Resource id: 0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 169
Major opcode: 147
Minor opcode: 3
Resource id: 0x0
Failed to open device
ERROR: Communication problem with k3b, it probably crashed.
martin@linux-desktop:~$ kdecore (KAction): WARNING: KActionCollection::KActionCollection( QObject *parent, const char *name, KInstance *instance )
(K3bDevice::HalConnection) initializing HAL >= 0.5
Mapping udi /org/freedesktop/Hal/devices/storage_model_ASUS_CRW_5224A to device /dev/hdc
Mapping udi /org/freedesktop/Hal/devices/storage_model__NEC_DVD_RW_ND_4550A to device /dev/hdb
/dev/hdc resolved to /dev/hdc
/dev/hdc is block device (0)
/dev/hdc seems to be cdrom
(K3bDevice::Device) /dev/hdc: init()
(K3bDevice::Device) /dev/hdc feature: CD Mastering
(K3bDevice::Device) /dev/hdc feature: CD Track At Once
(K3bDevice::Device) /dev/hdc unknown profile: 2
(K3bDevice::Device) /dev/hdc: dataLen: 60
(K3bDevice::Device) /dev/hdc: checking for TAO
(K3bDevice::Device) /dev/hdc: checking for SAO
(K3bDevice::Device) /dev/hdc: checking for SAO_R96P
(K3bDevice::Device) /dev/hdc: checking for SAO_R96R
(K3bDevice::Device) /dev/hdc: checking for RAW_R16
(K3bDevice::Device) /dev/hdc: checking for RAW_R96P
(K3bDevice::Device) /dev/hdc: checking for RAW_R96R
(K3bDevice::ScsiCommand) failed:
command: GET PERFORMANCE (ac)
errorcode: 70
sense key: NOT READY (2)
asc: 3a
ascq: 1
(K3bDevice::Device) /dev/hdc: GET PERFORMANCE length det failed.
(K3bDevice::ScsiCommand) failed:
command: GET PERFORMANCE (ac)
errorcode: 70
sense key: NOT READY (2)
asc: 3a
ascq: 1
(K3bDevice::Device) /dev/hdc: GET PERFORMANCE with real length 2048 failed.
(K3bDevice::Device) /dev/hdc: Number of supported write speeds via 2A: 0
(K3bDevice::DeviceManager) setting current write speed of device /dev/hdc to 0
/dev/hdb resolved to /dev/hdb
/dev/hdb is block device (64)
/dev/hdb seems to be cdrom
(K3bDevice::Device) /dev/hdb: init()
(K3bDevice::Device) /dev/hdb feature: CD Mastering
(K3bDevice::Device) /dev/hdb feature: CD Track At Once
(K3bDevice::Device) /dev/hdb feature: CD-RW Media Write Support
(K3bDevice::Device) /dev/hdb feature: DVD Read (MMC5)
(K3bDevice::Device) /dev/hdb feature: DVD+R
(K3bDevice::Device) /dev/hdb feature: DVD+RW
(K3bDevice::Device) /dev/hdb feature: DVD+R Double Layer
(K3bDevice::Device) /dev/hdb feature: DVD-R/-RW Write
(K3bDevice::Device) /dev/hdb feature: Rigid Restricted Overwrite
(K3bDevice::Device) /dev/hdb unknown profile: 2
(K3bDevice::Device) /dev/hdb: dataLen: 60
(K3bDevice::Device) /dev/hdb: checking for TAO
(K3bDevice::Device) /dev/hdb: checking for SAO
(K3bDevice::Device) /dev/hdb: checking for SAO_R96P
(K3bDevice::ScsiCommand) failed:
command: MODE SELECT (55)
errorcode: 70
sense key: ILLEGAL REQUEST (5)
asc: 26
ascq: 0
(K3bDevice::Device) /dev/hdb: checking for SAO_R96R
(K3bDevice::Device) /dev/hdb: checking for RAW_R16
(K3bDevice::ScsiCommand) failed:
command: MODE SELECT (55)
errorcode: 70
sense key: ILLEGAL REQUEST (5)
asc: 26
ascq: 0
(K3bDevice::Device) /dev/hdb: checking for RAW_R96P
(K3bDevice::ScsiCommand) failed:
command: MODE SELECT (55)
errorcode: 70
sense key: ILLEGAL REQUEST (5)
asc: 26
ascq: 0
(K3bDevice::Device) /dev/hdb: checking for RAW_R96R
(K3bDevice::Device) /dev/hdb: Number of supported write speeds via GET PERFORMANCE: 6
(K3bDevice::Device) /dev/hdb : 8467 KB/s
(K3bDevice::Device) /dev/hdb : 7056 KB/s
(K3bDevice::Device) /dev/hdb : 5645 KB/s
(K3bDevice::Device) /dev/hdb : 4234 KB/s
(K3bDevice::Device) /dev/hdb : 2822 KB/s
(K3bDevice::Device) /dev/hdb : 1411 KB/s
(K3bDevice::DeviceManager) setting current write speed of device /dev/hdb to 3324
/dev/hdc resolved to /dev/hdc
(K3bDevice::DeviceManager) dev /dev/hdc already found
/dev/hdb resolved to /dev/hdb
(K3bDevice::DeviceManager) dev /dev/hdb already found
(K3bDevice::DeviceManager) found config entry for devicetype: ASUS CRW-5224A
(K3bDevice::DeviceManager) found config entry for devicetype: _NEC DVD_RW ND-4550A
Devices:
------------------------------
Blockdevice: /dev/hdc
Generic device:
Vendor: ASUS
Description: CRW-5224A
Version: 1.40
Write speed: 0
Profiles: CD-ROM, CD-R, CD-RW
Read Cap: CD-ROM, CD-R, CD-RW
Write Cap: CD-R, CD-RW
Writing modes: SAO, TAO, RAW, SAO/R96P, SAO/R96R, RAW/R16, RAW/R96P, RAW/R96R
Reader aliases: /dev/hdc
------------------------------
Blockdevice: /dev/hdb
Generic device:
Vendor: _NEC
Description: DVD_RW ND-4550A
Version: 1.08
Write speed: 3324
Profiles: DVD-ROM, DVD-R Sequential, DVD-R Dual Layer Sequential, DVD-RAM, DVD-RW Restricted Overwrite, DVD-RW Sequential, DVD+RW, DVD+R, DVD+R Dual Layer, CD-ROM, CD-R, CD-RW
Read Cap: DVD-ROM, DVD-R, DVD-R Sequential, DVD-R Dual Layer, DVD-R Dual Layer Sequential, DVD-RW, DVD-RW Restricted Overwrite, DVD-RW Sequential, DVD+RW, DVD+R, DVD+R Dual Layer, CD-ROM, CD-R, CD-RW
Write Cap: DVD-R, DVD-R Sequential, DVD-R Dual Layer, DVD-R Dual Layer Sequential, DVD-RW, DVD-RW Restricted Overwrite, DVD-RW Sequential, DVD+RW, DVD+R, DVD+R Dual Layer, CD-R, CD-RW
Writing modes: SAO, TAO, RAW, SAO/R96R, RAW/R96R, Restricted Overwrite
Reader aliases: /dev/hdb
------------------------------
kdecore (KAction): WARNING: KActionCollection::operator+=(): function is severely deprecated.
martin@linux-desktop:~$ sudo k3b setup
X Error: BadDevice, invalid or uninitialized input device 169
Major opcode: 147
Minor opcode: 3
Resource id: 0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 169
Major opcode: 147
Minor opcode: 3
Resource id: 0x0
Failed to open device
ERROR: Communication problem with k3b, it probably crashed.
martin@linux-desktop:~$ kdecore (KAction): WARNING: KActionCollection::KActionCollection( QObject *parent, const char *name, KInstance *instance )
(K3bDevice::HalConnection) initializing HAL >= 0.5
Mapping udi /org/freedesktop/Hal/devices/storage_model_ASUS_CRW_5224A to device /dev/hdc
Mapping udi /org/freedesktop/Hal/devices/storage_model__NEC_DVD_RW_ND_4550A to device /dev/hdb
/dev/hdc resolved to /dev/hdc
/dev/hdc is block device (0)
/dev/hdc seems to be cdrom
(K3bDevice::Device) /dev/hdc: init()
(K3bDevice::Device) /dev/hdc feature: CD Mastering
(K3bDevice::Device) /dev/hdc feature: CD Track At Once
(K3bDevice::Device) /dev/hdc unknown profile: 2
(K3bDevice::Device) /dev/hdc: dataLen: 60
(K3bDevice::Device) /dev/hdc: checking for TAO
(K3bDevice::Device) /dev/hdc: checking for SAO
(K3bDevice::Device) /dev/hdc: checking for SAO_R96P
(K3bDevice::Device) /dev/hdc: checking for SAO_R96R
(K3bDevice::Device) /dev/hdc: checking for RAW_R16
(K3bDevice::Device) /dev/hdc: checking for RAW_R96P
(K3bDevice::Device) /dev/hdc: checking for RAW_R96R
(K3bDevice::ScsiCommand) failed:
command: GET PERFORMANCE (ac)
errorcode: 70
sense key: NOT READY (2)
asc: 3a
ascq: 1
(K3bDevice::Device) /dev/hdc: GET PERFORMANCE length det failed.
(K3bDevice::ScsiCommand) failed:
command: GET PERFORMANCE (ac)
errorcode: 70
sense key: NOT READY (2)
asc: 3a
ascq: 1
(K3bDevice::Device) /dev/hdc: GET PERFORMANCE with real length 2048 failed.
(K3bDevice::Device) /dev/hdc: Number of supported write speeds via 2A: 0
(K3bDevice::DeviceManager) setting current write speed of device /dev/hdc to 0
/dev/hdb resolved to /dev/hdb
/dev/hdb is block device (64)
/dev/hdb seems to be cdrom
(K3bDevice::Device) /dev/hdb: init()
(K3bDevice::Device) /dev/hdb feature: CD Mastering
(K3bDevice::Device) /dev/hdb feature: CD Track At Once
(K3bDevice::Device) /dev/hdb feature: CD-RW Media Write Support
(K3bDevice::Device) /dev/hdb feature: DVD Read (MMC5)
(K3bDevice::Device) /dev/hdb feature: DVD+R
(K3bDevice::Device) /dev/hdb feature: DVD+RW
(K3bDevice::Device) /dev/hdb feature: DVD+R Double Layer
(K3bDevice::Device) /dev/hdb feature: DVD-R/-RW Write
(K3bDevice::Device) /dev/hdb feature: Rigid Restricted Overwrite
(K3bDevice::Device) /dev/hdb unknown profile: 2
(K3bDevice::Device) /dev/hdb: dataLen: 60
(K3bDevice::Device) /dev/hdb: checking for TAO
(K3bDevice::Device) /dev/hdb: checking for SAO
(K3bDevice::Device) /dev/hdb: checking for SAO_R96P
(K3bDevice::ScsiCommand) failed:
command: MODE SELECT (55)
errorcode: 70
sense key: ILLEGAL REQUEST (5)
asc: 26
ascq: 0
(K3bDevice::Device) /dev/hdb: checking for SAO_R96R
(K3bDevice::Device) /dev/hdb: checking for RAW_R16
(K3bDevice::ScsiCommand) failed:
command: MODE SELECT (55)
errorcode: 70
sense key: ILLEGAL REQUEST (5)
asc: 26
ascq: 0
(K3bDevice::Device) /dev/hdb: checking for RAW_R96P
(K3bDevice::ScsiCommand) failed:
command: MODE SELECT (55)
errorcode: 70
sense key: ILLEGAL REQUEST (5)
asc: 26
ascq: 0
(K3bDevice::Device) /dev/hdb: checking for RAW_R96R
(K3bDevice::Device) /dev/hdb: Number of supported write speeds via GET PERFORMANCE: 6
(K3bDevice::Device) /dev/hdb : 8467 KB/s
(K3bDevice::Device) /dev/hdb : 7056 KB/s
(K3bDevice::Device) /dev/hdb : 5645 KB/s
(K3bDevice::Device) /dev/hdb : 4234 KB/s
(K3bDevice::Device) /dev/hdb : 2822 KB/s
(K3bDevice::Device) /dev/hdb : 1411 KB/s
(K3bDevice::DeviceManager) setting current write speed of device /dev/hdb to 3324
/dev/hdc resolved to /dev/hdc
(K3bDevice::DeviceManager) dev /dev/hdc already found
/dev/hdb resolved to /dev/hdb
(K3bDevice::DeviceManager) dev /dev/hdb already found
(K3bDevice::DeviceManager) found config entry for devicetype: ASUS CRW-5224A
(K3bDevice::DeviceManager) found config entry for devicetype: _NEC DVD_RW ND-4550A
Devices:
------------------------------
Blockdevice: /dev/hdc
Generic device:
Vendor: ASUS
Description: CRW-5224A
Version: 1.40
Write speed: 0
Profiles: CD-ROM, CD-R, CD-RW
Read Cap: CD-ROM, CD-R, CD-RW
Write Cap: CD-R, CD-RW
Writing modes: SAO, TAO, RAW, SAO/R96P, SAO/R96R, RAW/R16, RAW/R96P, RAW/R96R
Reader aliases: /dev/hdc
------------------------------
Blockdevice: /dev/hdb
Generic device:
Vendor: _NEC
Description: DVD_RW ND-4550A
Version: 1.08
Write speed: 3324
Profiles: DVD-ROM, DVD-R Sequential, DVD-R Dual Layer Sequential, DVD-RAM, DVD-RW Restricted Overwrite, DVD-RW Sequential, DVD+RW, DVD+R, DVD+R Dual Layer, CD-ROM, CD-R, CD-RW
Read Cap: DVD-ROM, DVD-R, DVD-R Sequential, DVD-R Dual Layer, DVD-R Dual Layer Sequential, DVD-RW, DVD-RW Restricted Overwrite, DVD-RW Sequential, DVD+RW, DVD+R, DVD+R Dual Layer, CD-ROM, CD-R, CD-RW
Write Cap: DVD-R, DVD-R Sequential, DVD-R Dual Layer, DVD-R Dual Layer Sequential, DVD-RW, DVD-RW Restricted Overwrite, DVD-RW Sequential, DVD+RW, DVD+R, DVD+R Dual Layer, CD-R, CD-RW
Writing modes: SAO, TAO, RAW, SAO/R96R, RAW/R96R, Restricted Overwrite
Reader aliases: /dev/hdb
------------------------------
kdecore (KAction): WARNING: KActionCollection::operator+=(): function is severely deprecated.
martin@linux-desktop:~$ X Error: BadDevice, invalid or uninitialized input device 169
Major opcode: 147
Minor opcode: 3
Resource id: 0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 169
Major opcode: 147
Minor opcode: 3
Resource id: 0x0
Failed to open device
kbuildsycoca running...
martin@linux-desktop:~$ sudo k3b setupten spousteci soubor se jmenuje
k3bsetup (dohromady).
Instaloval jsem balíčky z http://www.getdeb.net/release.php?id=802
martin@linux-desktop:~$ k3bsetup bash: k3bsetup: command not found martin@linux-desktop:~$ sudo k3bsetup sudo: k3bsetup: command not found martin@linux-desktop:~$ k3bsetup bash: k3bsetup: command not found martin@linux-desktop:~$ sudo k3bsetup sudo: k3bsetup: command not found martin@linux-desktop:~$
K otazce: Resilo se to tady: http://www.abclinuxu.cz/forum/show/175774.
martin@linux-desktop:~$ sudo chmod +s $(which cdrecord) martin@linux-desktop:~$Děkuji všem zúčastněným za rady
# chmod 6755 /usr/bin/{cdrecord,wodim,cdda2wav,icedax}
Tiskni
Sdílej: