-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Format: 1.8 Date: Mon, 16 Jun 2014 10:24:39 -0600 Source: crash Binary: crash Architecture: source amd64 Version: 7.0.7-1 Distribution: unstable Urgency: low Maintainer: Troy Heber <troyh@debian.org> Changed-By: Troy Heber <troyh@debian.org> Description: crash - kernel debugging utility, allowing gdb like syntax Closes: 746835 Changes: crash (7.0.7-1) unstable; urgency=low . * Export the static ELF and compressed kdump vmcoreinfo_read_string() functions from netdump.c and kdump.c via a new read_vmcoreinfo() method in the global program_context structure. The function get_log_from_vmcoreinfo() will access vmcoreinfo data via the new pointer instead of requiring its callers to pass pointers to their dumpfile-specific function. * Linux 3.15 and later kernels configured with CONFIG_RANDOMIZE_BASE can be now be readily identified because of new kernel symbols that have been added. For those kernels, the new "--kaslr=<offset>" and/or "--kaslr=auto" options are not necessary for ELF or compressed kdump vmcores, or for live systems that have /proc/kallsyms showing the relocated symbol values. A new KASLR initialization function called kaslr_init() is now called by symtab_init() prior to the initial symbol-sorting operation. If kaslr_init() determines that KASLR may be in effect, it will trigger a search for the relevant vmlinux symbols during the sorting operation, which in turn will cause the relocation value to be automatically calculated. * Implemented a new "bt -c cpu(s)" option to display the backtrace of the active task on one or more cpus. The cpus must be specified in a comma- and/or dash-separated list; for examples ""3", "1,8,9", "1-23", or "1,8,9-14". Similar to "bt -a", the option is only applicable with crash dumps. * Fix for Linux 3.11 and later ARM kernels, in which all non-panicking cpus offline themselves during a kdump procedure. This causes an invalid cpu count determination during crash session initialization from an ARM vmcore. The patch utilizes the cpu count found in the cpu_active_map if it is greater than the count in the cpu_online_map. In addition, the maximum NR_CPUS value for the ARM architecture has been raised from 4 to 32. * Fix for the X86_64 "bt" command on Linux 3.3 and later kernels to properly display exception frame register contents on NMI stacks. Kernel commit 3f3c8b8c4b2a34776c3470142a7c8baafcda6eb0 added 12 more values to the NMI exception stack to handle nested NMIs caused by page faults or breakpoints that could occur while handling an NMI exception. * Kernel commit 28696f434fef0efa97534b59986ad33b9c4df7f8 changed the stack layout again, swapping the location of the "saved" and "copied" registers. This can be detected automatically, because the "copied" registers contain either a copy of the "saved" registers, or point to "repeat_nmi". So, if "repeat_nmi" is found as the return address, assume that this is the old layout, and adjust the stack pointer again. Without the patch, incorrect register values are displayed in the exception frame dump in the NMI stack backtrace. * Fix for the built-in "g" alias, which apparently has not worked correctly since crash-5.1.4. Without the patch, if the "g" alias and the first argument are separated by one space, then the first first character of that argument would get stripped prior to being passed to the embedded gdb module. * Removed the BASELEVEL_REVISION string from defs.h, which serves no purpose since the deprecation of the remote daemon, and typically has been out of sync with the crash version. * Fix for the "p", "irq", "struct", "union" and "*" commands if a cpu specification contains an invalid cpu number. Without the patch, a segmentation violation may be generated. * Implemented a new capability for the "ptov" command that takes a per-cpu offset and cpu specification argument and translates it into the kernel virtual addresses for the cpus specified. * Implemented a new "ps -m" option that is a similar, complementary option to "ps -l", but which translates the task timestamp value from a decimal or hexadecimal nanoseconds value into a more human-readable string consisting of the number of days, hours, minutes, seconds and milliseconds that have elapsed since the task started executing on a cpu. More accurately described, it is the time difference between the timestamp copied from the per-cpu runqueue clock when the task last started executing compared to the most current value of the per-cpu runqueue clock. * In addition, a new "ps -C <cpu-specifier>" option has been added that can only be used with "ps -l" and "ps -m", which sorts the global task list into per-cpu blocks; the cpu-specifier uses the standard comma or dash separated list, expressed as "-C 1,3,5", "-C 1-3", "-C 1,3,5-7,10", or "-Call" or "-Ca" for all cpus. * Implemented a new "runq -m" option that is a simliar, complementary option to "runq -t", but which displays the amount of time that the active task on each cpu has been running, expressed in a format consisting of days, hours, minutes, seconds and milliseconds. * Implemented a new "kmem -h" option that displays the address of each hugepage hstate array entry, its hugepage size, its free and total counts, and name string. * Implemented a new "ps -S" option that displays a summary consisting of the number of tasks in a task state. * Fix for the "arguments-input-file" feature to protect against a called command modifying an argument string. For example, the "struct" command modifies "-l struct_name.member" argument strings, and so without the patch, all iterative calls after the first one will fail. * Fix failure to build from source when compiling the crash utility with gcc-4.9 (closes: #746835) * Fix for displaying enum values that are greater than 32-bits in size. Without the patch, the upper 32-bits are clipped off and displayed as integer-sized value. * If the kernel (live or dumpfile) has the "kpatch" module installed, the tag "[KPATCH]" will be displayed next to the kernel name in the initial system banner and by the "sys" command. * Fix for the "DEBUG KERNEL:" display in the initial system banner and by the "sys" command when using a System.map file with a Linux 3.0 and later debug kernel. Without the patch, the kernel version is not displayed in parentheses following the debug kernel name. * If the gdb-<version>.patch file has changed and a rebuild is being done from within a previously-existing build tree, "patch -N" the gdb sources, and start the rebuild from the gdb-<version> directory instead of the gdb-<version>/gdb directory. * Fix to prevent a possible segmentation violation generated by the "runq -g" command when run on a very active live system due to an active task on a cpu exiting while the command is running. * Fix for the "runq -g" command on Linux 3.15 and later kernels, where the cgroup_name() function now utilizes kernfs_name(). Without the patch, the command fails with the error message "runq: invalid structure member offset: cgroup_dentry". * Fix for the "extend" command when running with an x86_64 crash binary that was built with "make target=ARM64" in order to analyze ARM64 dumpfiles on an x86_64 host. Without the patch, if the extend command is used with an extension module built in the same manner, it fails with the message "extend: <module>.so: not an ELF format object file". * Introduce support for 32-bit ARM kernels that are configured with CONFIG_ARM_LPAE. The patch implements the virtual-to-physical address translation of 64-bit PTEs used by ARM LPAE kernels. 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