[Crash-utility] [ANNOUNCE] crash version 7.1.7 is available

Download from: http://people.redhat.com/anderson or https://github.com/crash-utility/crash/releases The github master branch serves as a development branch that will contain all patches that are queued for the next release: $ git clone git://github.com/crash-utility/crash.git Changelog: - Set the default 32-bit MIPS HZ value to 100 if the in-kernel config data is unavailable, and have the "mach" command display the value. (rabinv(a)axis.com) - Enable SPARSEMEM support on 32-bit MIPS by setting SECTION_SIZE_BITS and MAX_PHYSMEM_BITS. (rabinv(a)axis.com) - Fix for Linux 4.9-rc1 commits 15f4eae70d365bba26854c90b6002aaabb18c8aa and c65eacbe290b8141554c71b2c94489e73ade8c8d, which have introduced a new CONFIG_THREAD_INFO_IN_TASK configuration. This configuration moves each task's thread_info structure from the base of its kernel stack into its task_struct. Without the patch, the crash session fails during initialization with the error "crash: invalid structure member offset: thread_info_cpu". (anderson(a)redhat.com) - Fixes for the gathering of the active task registers from 32-bit MIPS dumpfiles: (1) If ELF notes are not available, read them from the kernel's crash_notes. (2) If an online CPUs did not save its ELF notes, then adjust the mapping of each ELF note to its CPU accordingly. (rabinv(a)axis.com) - Add support for "help -r" on 32-bit MIPS to display the registers for each CPU from a dumpfile. (rabinv(a)axis.com) - Fix for Linux 4.9-rc1 commit 0100301bfdf56a2a370c7157b5ab0fbf9313e1cd, which rewrote the x86_64 switch_to() code by embedding the call to __switch_to() inside a new __switch_to_asm() assembly code ENTRY() function. Without the patch, the message "crash: cannot determine thread return address" gets displayed during initialization, and the "bt" command shows frame #0 starting at "schedule" instead of "__schedule". (anderson(a)redhat.com) - When each x86_64 per-cpu cpu_tss.x86_tss.ist[] array member (or in older kernels, each per-cpu init_tss.x86_hw_tss.ist[] array member), is compared with its associated per-cpu orig_ist.ist[] array member, ensure that both exception stack pointers have been initialized (non-NULL) before printing a WARNING message if they don't match. (anderson(a)redhat.com) - Fix for a possible segmentation violation when analyzing Linux 4.7 x86_64 kernels that are configured with CONFIG_RANDOMIZE_BASE. Depending upon the randomized starting address of the kernel text and static data, a segmentation violation may occur during session initialization, just after the patching of the gdb minimal_symbol values message. (anderson(a)redhat.com) - Restore the x86_64 "dis" command's symbolic translation of jump or call target addresses if the kernel was configured with CONFIG_RANDOMIZE_BASE. (anderson(a)redhat.com) - Fix for the 32-bit MIPS "bt" command to prevent an empty display (task header only) for an active task if the epc register in its exception frame contains 00000000. (rabinv(a)axis.com) - Fix for support of Linux 4.7 and later x86_64 ELF kdump vmcores from kernels configured with CONFIG_RANDOMIZE_BASE. Without the patch, the crash session may fail during initialization with the message "crash: vmlinux and vmcore do not match!". (anderson(a)redhat.com) - Fix for the x86_64 "mach" command display of the vmemmap base address in Linux 4.9 and later kernels configured with CONFIG_RANDOMIZE_BASE. Without the patch, the command shows a value of ffffea0000000000 next to "KERNEL VMEMMAP BASE". (anderson(a)redhat.com) - Since the Linux 3.10 release, the kernel has offered the ability to create multiple independent ftrace buffers. At present, however, the "trace.c" extension module is only able to extract the primary buffer. This patch refactors the trace.c extension module so that the global instance is passed around as a parameter rather than accessing it directly, and then locates all of the available instances and extracts the data from each of them. (kyle.a.tomsic(a)gmail.com) - Fix for the s390x "bt" command for active tasks. Since the commit above in this crash-7.1.7 release that added support for the new CONFIG_THREAD_INFO_IN_TASK configuration, the backtrace of active tasks can be incomplete. (holzheu(a)linux.vnet.ibm.com) - In collaboration with an update to the /dev/crash kernel driver, fix for Linux 4.6 commit a7f8de168ace487fa7b88cb154e413cf40e87fc6, which allows the ARM64 kernel image to be loaded anywhere in physical memory. Without the patch, attempting to run live on an ARM64 Linux 4.6 and later kernel may display the warning message "WARNING: cannot read linux_banner string", and then fails with the message "crash: vmlinux and /dev/crash do not match!". Version 1.3 of the crash driver is required, which introduces a new ioctl command that retrieves the ARM64-only "kimage_voffset" value that is required for virtual-to-physical address translation. (anderson(a)redhat.com) - Update of the sample memory_driver/crash.c /dev/crash kernel driver to version 1.3, which adds support for Linux 4.6 and later ARM64 kernels, kernels configured with CONFIG_HARDENED_USERCOPY, and S390X kernels use xlate_dev_mem_ptr() and unxlate_dev_mem_ptr() instead of kmap() and kunmap(). (anderson(a)redhat.com)