Security update for Linux kernel (k_timer)
(Last modified: 05MAY2003)
solutions Security update for Linux kernel (k_timer) SuSE Linux Maintenance Web (2c593236072d9e7ae4b8a446020355c7)
This article applies to systems with the
k_timerkernel package installed, please use the appropriate kernel package if you are using a different kernel:
- "Security update for Linux kernel (k_deflt)" (http://sdb.suse.de/en/psdb/html/d3968df0de3c33f372ea25214daca465.html)
rpm -qf /boot/kernel/image
The vulnerability allows a local unprivileged attacker to
rootprivileges by using
combination with automatic kernel module loading on request, also known
As a temporary workaround, it is possible to disable the automatic loading of kernel modules by running the following command as user "
echo /no/such/file >/proc/sys/kernel/modprobe
This patch also includes improved argument checking for getting and setting the IEEE instruction pointer of the last floating point exception in the S/390 specific code to prevent possible crashes if it is wrongly used.
Restrictions for path-grouped DASDs
- Do not re-configure or re-cable path-grouped DASDs or path-grouped channel-attached tapes while the system is running, to avoid problems with path re-validation code.
- In such configuration the system may hang during re-boot. As a safe workaround use the "
halt" command and perform an
- Fix crashes in user access if the CPU already called schedule.
- Fix skipping of more than 511 blocks in the tape driver.
- Fix handling of memory allocation failures.
- Fix handling of user access return status with
- Fix codepage conversion with strings longer than 256 bytes.
- Fix handling of memory areas protected with
ptrace()ocking which could cause crashes/kernel hangs.
- Fix interrupt handling related to status pending condition.
- Fix path not operational detection using last path used mask.
- Fix lost interrupt because of zero basic sense data.
- Fix deadlock with all CPUs in
- Fix oops during dynamic addition of an FCP adapter..
- Fix TLB handling for high SMP workloads with heaps of threads.
- Fix possible user process crash or kernel oops because of 31-bit address space overflow.
- Fix too much logging for incoming ELS via
- Add info for DASD and QDIO into
- Fix ESS DASD support: Enhanced and fixed various ERP scenarios.
- Fix system hang caused by using
fdasdon unformatted devices.
- Fix Kernel panic when mounting an unformatted device.
- Fix handling of state change pending interrupts.
- Fix hang in
DASD_enable_rangesduring partition check with large empty ranges.
- Fix panic caused by pressing
Ctrl-Cduring format of a DASD device.
- Fix misdetection of DIAG devices as ECKD devices.
- Fix deadlock with dynamic attachment under VM.
- Fix long initialization time if
dasd=parameter is missing.
- Fix oops when disabling a DASD while formatting it.
- Fix a longstanding TCP problem that can lead to hanging ssh sessions.
- fix SMP races with hanging rsync processes and data loss on power failure.
- Fix possible data exposure and data corruption caused by abusing
statfsoverflow for huge NFS filesystems.
- Fix problem in
O_DIRECTimplementation when reading files with holes in it.
- Fix possible oops when trying to free pages in async I/O.
- Fix longstanding off-by-one error in
keventdinitialization that can lead to system freeze.
- Backport of tape driver from 2.4.19.
- Backport of crypto device driver from 2.4.19.
- Add Software Watchdog module.
- Add 3590 tape support.
This update includes the following IBM code drops:
- 2003-02-20 kernel 2.4.7 for the "August 2001 stream"
rpm -Fvh k_timer.rpm zipl
please do not forget to run
ziplafter installing the
k_timerfor the system to remain bootable.
Finally, reboot the system with
shutdown -r now
to load the new kernel (replace "
now" with the appropriate amount of time to allow local users to cleanly log out, for example "
+5" for five minutes.)
Download Source Packages
Download the source code of the patches for maintained products.
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