HP Tru64 UNIX and TruCluster Server Version 5.1B-6 Patch Summary and Release Notes

• Removes the code for smmsp user and group creation.
• Fixes an issue in strncmp.
Patch 28010.00
OSFBIN540
• Fixes a potential system panic from an illegal memory reference due to a race condition in
the class scheduling code.
• Fixes consumption of processor resources for an extended period creation of a core file for
processes with large address spaces, thereby avoiding blocking other threads of execution
and leading to a time out panic.
• Fixes a deadlock due to respective buffers sharing a physical page concurrent AIO operations
to a shared memory region from multiple processes.
• Fixes a system panic when tcbhashsize tunable is modified on a running system with
lock mode 4 enabled.
• Fixes for Mobile IPv6 TAHi conformance test failures.
• Fixes a Path MTU problem in network stack.
• Fixes double unlocking of netisr_lock in netisr thread.
• Resolves synchronization issues surrounding concurrent references to shared memory.
• Fixes a SACK (Selective Acknowledgement) validation issue with TCP.
• Resolves a race condition between process exit and coredump.
• Fixes a problem in the FIFO code where usage of fuser(2) subsequent to opening a FIFO
may result in a kernel panic with the panic string VREF: Invalid v_usecount
transition.
• Fixes a problem wherein the signal mask was not getting restored after returning from
sigsuspend.
• Fixes potential hang or panic resulting from blocking under select_enqueue().
• Turns on the TCP Selective Acknowledgment (SACK) option by default.
• Corrects a problem with FIFO code where stat(2) or fstat(2) operation on a FIFO
returns NODEV in the st_dev field of the stat structure.
• Corrects an issue that can lead to a kernel memory fault panic when locking file backed
memory on a NUMA system.
• Corrects problems with RFC1323 TCP timestamps and PAWS implementation.
• Fixes a timing window in the VM subsystem and prevents a race condition between the
page fault and the pageout paths.
• Fixes an issue with NFS vnode reclaim path in CFS (Cluster File System) environment.
• Fixes loss of multicast packet reception after netrain failover.
• Allows filtering of dup2 syscalls while audit object selection is enabled.
• Provides an enhancement to remove drawbacks of using TCP keepalives and make LAN
cluster more resilient.
• Corrects a potential security vulnerability whereby, under certain circumstances, a local
authenticated user could cause a Denial of Service.
• Fixes TCP SACK unaligned access panic.
• Improves performance of ufs extendfs operation on a mounted filesystem.
• Introduces a new sysconfig tunable to control the behavior of the O_APPEND flag with
respect to the pwrite(2) system call.
• Fixes a problem with the kernel traffic monitoring thread.
• Fixes a problem in FFM unmount code where, under certain circumstances two or more
unmount threads race and one thread can return without releasing the NFS
lock_for_exported results in a hang during unmount or shutdown.
64 Tru64 UNIX Patches