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SubjectLinux 2.2.19 release notes
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The master copy of this file is at http://www.linux.org.uk. Check there for
updates and errata



Linux 2.2.19 Release Notes

Platforms:Alpha, M68K, PowerPC, S/390, Sparc, X86

Introduction
Linux 2.2.19 is the latest update to the Linux kernel tree. The out of
the box tree supports the Alpha, PPC, S/390, Sparc and X86 platforms.
MIPS and ARM are mostly merged but you should obtain the platform
specific tree.

Compilers
This code is intended to build with gcc 2.7.2 and egcs 1.1.2. gcc
2.95.2 and Red Hat gcc 2.96-79 are believed to build the tree
correctly. As yet we have no detailed information on gcc 2.95.3 but it
seems to build the tree correctly.

Binary Compatibility
Linux 2.2.19 should on the whole be fully binary compatible with old
modules. In general you should not assume binary compatibility between
kernel object modules in Linux.

Security Notes

Linux 2.2.19 contains significant security fixes as a result of third
party testing and auditing. We are very grateful to those who
contributed work and reports to this effort, in particular to OpenWall
and to Chris Evans.

Architecture Updates

Alpha

+ Remove a bogus printk in the OSF syscall error path.
+ Fix ASN reuse races on Alpha SMP
+ Fix read_unlock races on Alpha SMP
+ Show registers across CPU's on SMP Alpha oops
+ Fix bottom half races on Alpha SMP
+ Use our own IRQ routing table for Ruffian boards
+ Remove bogus printk from Alpha exception tables

ARM
The ARM tree has been partially synchronized with the ARM
working tree for 2.2

+ Fix ptrace races on ARM
+ Miscellaneous ARM updates
+ Fix NFS alignment problems with ARM

i386

+ Fix CyrixIII panic on boot in some cases
+ Walk the top 8K not the top 4K of the stack on error dumps
+ Fix further CMOS locking
+ Correct microcode driver feature checking
+ Use E820 memory sizing
+ Handle E820 problems when run with IBM thinkpad
+ Speed up irq/fault paths by avoiding xchg()
+ Tighten up K6 bug check
+ The DMI check for APM could end up running after APM started
+ Updated A20 handler to 2.4 code. Fixes hangs on some obscure
kit.
+ Watch for timers being reset to 18Hz by firmware bugs

PowerPC

+ Fix power off during IDE pmac init
+ Update atyfb128 and serial for pmac
+ Add workarounds for firmware bugs on early iMac
+ Fix oops on resume on some pmac machines
+ Fix problems in the Macintosh HID driver and input driver
+ Fix the pci syscall on the PowerMac machines

S/390

+ General fix ups for S/390 problems
+ Add keventd to S/390 for drivers
+ Update DASD driver
+ Add support for over 4K of partitions in procfs
+ Update S/390 to support new official ELF id
+ Update hwc, ctc and iucv
+ Fix a problem in the FPU emulator

Sparc

+ Add support for quad sbus sunhme
+ Update NFS compatibility syscalls
+ Add watchdog driver support
+ Update sparc64 syscall tables
+ Fix NETCTL_GETFD on sparc64

Security Updates

binfmt_misc
binfmt_misc touched user pages directly and could be exploited.

CPIA driver
An off by one buffer check in the CPIA driver allowed users to
scribble into kernel memory

CPUID and MSR drivers
Unloading and reloading these could cause a crash due to
missing unregister calls. Normally not exploitable but if set
to autoload and unload they could be abused.

Classifier
Fix a possible hang in the classifier code.

get/setsockopt
Mishandling of sign bits in setsockopt and getsockopt allowed
local DoS and other attacks.

Ptrace/exec race
Ptrace and exec as well as ptrace/suid races existed that could
give a local user privileges.

Sockfilter
Boundary cases in sockfilter could be abused. It is not clear
if these are actually exploitable

strnlen_user
Several problems with the implementation have been cured.

SYS5 shared memory
A code path existed where the shm code would scribble on very
recently freed memory. It is not clear that this was actually
exploitable.

sysctl
Mishandling of sign bits in sysctl allowed local users to
scribble on kernel memory.

Tighten packet length checks
The masquerading code checks were a little lax in some cases.
None of these are believed actually exploitable however.

User access asm bug on x86
Certain obscure constant copies came out copying the wrong
number of bytes. No known exploit or actual problem case is
known but it potentially existed.

UDP Deadlock
A local user could deadlock the kernel due to bugs in UDP port
allocation.

Core Updates

Core Dump
Write out core dumps as sparse files

Dcache aging
Do aging on the dcache to improve behaviour under load

Hash functions
Improve the inode and dcache hash functions

Misc device layer
Reuse of the same minor number is now errored

Page cache coherency
A problem existed on machines with ambiguous user/kernel
addresses (the S/390) that could cause the page and buffer
cache to lose coherency

Page fault
Ensure a task always handles page faults in run state

Signal delivery
Queued I/O completion delivery from interrupt context was
unreliable

Virtual memory
Revamp the core VM handling to remove a long standing deadlock.

Driver Updates

3c527
Update the 3c527 driver significantly

3c59x
Significantly updated

8139too
Updated with some of the fixes from 2.4

Advantech Watchdog
Add support for the Advantech watchdog

AGP
Added support for the Intel i815

ALi 5451
Fix hang on boot when the midi IRQ is shared

CMPCI
Initialize driver if compiled into the kernel

COSA
Fix a wrong memory free

CS46xx
Fix a problem where the driver failed on the eMachines 400

CS89x0
Fix media selection

DAC960
Updated to authors latest version

DRM
Remove the 'unused' AGP autoload hack from the DRM modules.

DVD
Fix a problem with reading physical blocks from DVD

EEpro100
Fix posted write/delay problem.

EMU10K
Fix problems when the emu10k was compiled built in

ES1370/1371/Solo1
Fix bugs shown up by some application ioctl sequences

ESS Maestro 3
Support for this chip has been added

I2O
Update the i2o block driver.

i810 watchdog
Added support for the watchdog on the i810 series chipsets

IDE
Add support for the onstream SC-x0 series tape drives

Intel 'Panther' ethernet
Driver for the onboard ethernet on this old Intel 486 board.

ISDN
Extensively updated, new drivers for eicon, hsydn and other
boards.

Lance
Fix a dereference to freed memory

Lanstreamer
Fix crashes on SMP boxes

LP driver
Remove incorrect message

MDA console
This driver has been cleaned up

Metricom
Support new metricom units with longer serial numbers.

Microcode driver
Updated to match 2.4

NE2000 PCI
Added support for full duplex capable cards

SCC driver
Fix a problem with the SCC driver would hang on multiple missed
interrupts

SiS900
Add support for the ICS1893 PHY

SonicVibes
Fix bugs shown up by some application ioctl sequences

Starfire
New driver.

SX serial
This driver failed to handle break events correctly

Synclink
Updated and several bugs fixed

TGA frame buffer
This driver can now be built as a module

Tulip
Add basic support for the AMDtek Comet chip

USB ACM
Loosen up end point rules to allow slightly non conforming
hardware to work

USB audio
Updated to match 2.4

USB Bluetooth driver
Updated to match 2.4

USB DC2xx driver
Updated to match 2.4

USB Empeg driver
Updated to match 2.4

USB HID
Updated to match 2.4. Fix endian problems and locking.

USB hub
Fix locking on USB hub code

USB FTDI serial
Updated to match 2.4

USB Keyspan serial
Updated to match 2.4

USB printer
Updated to match 2.4

USB Rio
Updated to match 2.4

USB scanner
Add further ids for new scanners (eg Epson 1240)

USB Serial
Fix name reporting in procfs. Update core code to match 2.4

USB visor
Update the driver to match 2.4

USBdevfs
Fix missing unlock_kernel

VIA Rhine
Added support for the VT6102

Yamaha PCI audio
Add support to setup the legacy devices. Remove old legacy mode
driver.

File System Updates

FAT
Updated to handle pre 1980 dates properly

ISO9660
Fix several bugs shown up by more odd CD-ROMS

Minix subpartitions
We now support minix subpartitions

NFS caching
Fix a nasty bug in the NFS caching

NFS Client
Various small fixes

SMBfs
Updated to handle pre 1980 dates properly

Miscellaneous Updates

Belorussia NLS table
Belorussia/Ukraine NLS table (koi8-ru)

Credits
Update credits and maintainers files to reflect several moves

Parport
Fix documentation

Ver_linux
Update the ver_linux reporting script

Network Updates

Accept
Add wake_one semantics to accept

AX.25
Fix a missing skb->protocol init

IRDA
Backport the 2.4 IRDA oops fix. Document options.

Masquerading
Update the core masquerading code. Fix problems with realaudio
masquerading

QoS
Remove experimental tag on QoS features

SLHC
Fix endian problems in the VJ compression code

SunRPC
Updated and RPC ping congestion check added

TCP/IP
Fix problems in the TCP layer

Wireless
Updated wireless headers

SCSI Updates

3Ware
Update driver, add 7000 series support

AHA1542/AHA1740
Remove a bugs sense buffer size check

AIC7xxx
Update AIC7xxx to v5.1.33

ATP870U
Fix problems with disconnect

CpqFC
Update Compaq fibrechannel driver

DC390
Small driver updates

ICP Vortex
Driver updates from ICP

PPA scsi
Fix panic on timeout. Update driver

Scsi_malloc
Clean up out of memory paths
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