Accepted crash 7.1.1-1 (source amd64) into unstable
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Hash: SHA256
Format: 1.8
Date: Wed, 27 May 2015 11:20:02 -0600
Source: crash
Binary: crash
Architecture: source amd64
Version: 7.1.1-1
Distribution: unstable
Urgency: medium
Maintainer: Troy Heber <troyh@debian.org>
Changed-By: Troy Heber <troyh@debian.org>
Description:
crash - kernel debugging utility, allowing gdb like syntax
Closes: 699367 756969
Changes:
crash (7.1.1-1) unstable; urgency=medium
.
* Autopkgtest fix from Martin Pitt <mpitt@debian.org> (Closes: #756969):
- Drop sudo calls; they potentially hang forever asking for a password or
might get denied, destroy the environment, and are not necessary as the
test already has "needs-root".
- Fix invalid indentation of here-doc
- Suppress expected stderr output of apt-key (which causes a test failure)
- Drop "set -x", as that causes stderr output and the called commands are
already verbose enough.
- Drop -security pocket for Ubuntu's ddebs.u.c., as that does not exist.
.
* Fix for two minor issues with the "net" command. Without the patch, the
"net -a" option appends its correct output with the command's "Usage:"
message; and if either the "net -x" or "net -d" options are used without
also specifying "-s" or "-S", the error message would indicate "net:
illegal flag: 800000" or "net: illegal flag: 1000000" instead of showing
the command's "Usage:" message.
.
* If the kernel (live or dumpfile) has the TAINT_LIVEPATCH bit set, or if
the Red Hat "kpatch" module is installed, the tag "[LIVEPATCH]" will be
displayed next to the kernel name in the initial system banner and by the
"sys" command. This new tag replaces the "[KPATCH]" tag that was
introduced in crash-7.0.7.
.
* Addressed three Coverity Scan complaints in vmware_vmss.c:
.
50:leaked_storage: Variable "fp" going out of scope leaks the
storage it points to.
53:leaked_storage: Variable "fp" going out of scope leaks the
storage it points to.
256:warning: Use of memory after it is freed
.
* Remove the LKCD-only "propeller spinner" seen when a dumpfile read
requires more than 2048 page header accesses. This was put in place
because of the non-random-access design of LKCD dumpfiles. Without the
patch, the spinner display is intermingled with command output, which
complicates the parsing of the output.
.
* Fix to support the Linux version increment from 3 to 4. Without the
patch, both dumpfile and live sessions fail during initialization, issuing
the message "WARNING: kernel version inconsistency between vmlinux and
dumpfile" or "WARNING: kernel version inconsistency between vmlinux and
live memory", followed by the nonsensical fatal error message "crash:
incompatible arguments: vmlinux is not SMP -- vmcore is SMP" or "crash:
incompatible arguments: vmlinux is not SMP -- live system is SMP". To
prevent unexpected kernel version bumps in the future, support has been
added for version 5.
.
* Add support for more than 16TB of physical memory space in the SADUMP
dumpfile format. Without the patch, there is a limitation caused by
several 32-bit members of dump_header structure, in particular the
max_mapnr member, which overflows if the dumpfile contains more than 16TB
of physical memory space. The header_version member of the dump_header
structure has been increased from 0 to 1 in this extended new format, and
the new 64-bit members will be used.
.
* Fix for command lines that are redirected to a pipe. Without the patch,
if an external piped-to command contains a quoted string that includes a
"|" character, the command fails with the message "crash: pipe operation
failed".
.
* Fix for insecure temporary file usage in _rl_tropen() as reported by
readline library CVE-2014-2524.
.
* When the gdb-<version>.patch file has changed and a rebuild is done from
within a previously-existing build tree, the "patch -N" option is used to
ignore patches that have been previously applied; this patch also applies
the "patch -r-" option to prevent unnecessary .rej files from being
created.
.
* Fix to account for Xen hypervisor's "domain" structure member name change
from "is_paused_by_controller" to "controller_pause_count". Without the
patch, in Xen 4.2.5 and later, the crash session fails during
initialization with the error message 'crash: invalid structure member
offset: domain_is_paused_by_controller".
.
* During initialization, reject useless ARM64 "(A)" and "(a)" absolute
symbols that are below the text region. Without the patch, several
recently-introduced absolute symbols have been introduced into the kernel,
which will be displayed by "sym -l" prior to the first kernel virtual
address symbol, and will show up in command output where memory values are
translated into kernel symbol references.
.
* Fix for ARM64 kernels to account for changes in the virtual memory layout
introduced in Linux 3.17. The vmalloc region end address, and the vmemmap
start and end addresses are now calculated at kernel build time, because
they depend upon the size of a struct page. Accordingly, the crash
utility needs to calculate those three address values dynamically, after
the embedded gdb module has initialized. Without the patch, reads of page
structures return invalid data due to incorrect virtual-to-physical
translations of memory in the vmemmap range. This in turn causes commands
that require page structure contents to fail or show invalid data, such as
"kmem -p", "kmem -[sS]", and the "kmem -[fF]" options.
.
* Fix to support ELF vmcore dumpfiles whose PT_LOAD file offset values of
their respective memory segments are not laid out sequentially from low to
high in the dumpfile. This has only been seen in ELF dumpfiles created by
VMware's "vmss2core -M" facility. Without the patch, the crash session
may fail during initialization, either with the message "cannot malloc ELF
header buffer", or "crash: <dumpfile>: not a supported file format".
.
* Enhancement to the support of VMware .vmss suspended state dumpfiles.
There may be holes in the memory address saved for PCI, etc. In such
cases, the memory dump is divided into regions. With this patch, up to 3
memory regions are supported.
.
* Fortified the error handling of task gathering from the pid_hash[] chains
during session initialization. If a chain has been corrupted, the patch
prevents the sequence from entering an infinite loop, and the error
messages associated with corrupt/invalid chains have been updated to
report the pid_hash[] index number.
.
* Implemented a new STRDUPBUF() utility that will duplicate an existing
string into a buffer allocated with GETBUF(). As is the case with any
buffer allocated with GETBUF(), it is only meant to exist during the
life-span of the current command. If it is not explicitly freed via
FREEBUF(), then it will be freed automatically prior to the next command.
.
* Implemented a new fill_struct_member_data() function that gathers a bundle
of data that describes a structure member. The function receives a
pointer to a struct_member_data structure, in which the caller has
initialized the "structure" and "member" name pointers:
.
struct struct_member_data {
char *structure;
char *member;
long type;
long unsigned_type;
long length;
long offset;
long bitpos;
long bitsize;
};
.
A gdb "printm" command is crafted using those two fields, and the output
of the command is used to initialize the remaining six fields. Adapted
from Qiao Nuohan's "pstruct" extension module.
.
* Implemented a new "runq -c cpu(s)" option to display the run queue data of
specified cpus. It can be used in conjunction with all runq command
options. The cpus must be specified in a comma- and/or dash-separated
list; for examples, "3", "1,8,9", "1-23", or "1,8-15".
.
* Build extension modules that utilize the generic extensions/Makefile
with -g. In addition, build the snap.c extension module with -g.
.
* Several fixes, updates, and enhancements for 32-bit MIPS support:
(1) The MIPS general purpose registers in the elf_gregset_t
don't start at index 0 but at index 6.
(2) Adjust for the kernel's pt_regs structure changes between
kernel versions. For example, fields are inserted into the
middle based on build time options, and the amount of padding
at the head of the structure was changed relatively recently.
To handle this, split the structure definition into two parts
and get the offsets of these two parts dynamically.
(3) Do not display each parsed kernel symbol during initialization
when invoked with "crash -d8".
(4) Add support for loading raw MIPS ramdump dumpfiles.
(5) Add support for compressed kdump dumpfiles.
.
* Fix for a typo in "help foreach", and a fix for a spelling error in "help
input".
.
* Fix for "and and" and "the the" typos in the README file.
.
* Fix to address the Xen 4.5.0 hypervisor symbol name change from "dom0" to
"hardware_domain". Without the patch, the crash session fails with the
error message "crash: cannot resolve: dom0".
.
* Fix for a regression in crash-7.1.0 that causes failures when the "crash
-t" option is run on a live system, and when analyzing remote Linux
kernels. Without the patch, "crash -t" on a live system fails with the
message "crash: cannot open remote memory source: /dev/mem", and attempts
to analyze a Linux kernel remotely just shows the kernel timestamp and
exits immediately.
.
* Speed up the session invocation time of "flattened" format dumpfiles
created by the makedumpfile(8) facility. When sorting the blocks of
memory by their intended ELF or compressed kdump file offsets, the patch
replaces the bubble-sort method that is currently used with an insertion
sort method.
.
* Remove the non-existent "-L" option from the "ps" command's mutually-
exclusive options error message.
.
* Fix for the "irq", "mount", "kmem -p" and "kmem -v" commands when they are
used in an input file. If more than one of any of those four commands are
used in an input file, the output of the second and subsequent command
instances will not display their respective command headers.
.
* Implemented a new "kmem -m" option that is similar to "kmem -p", but it
allows the user to specify the page struct members to be displayed. The
option takes a comma-separated list of one or more page struct members,
which will be displayed following the page structure address. The "flags"
member will always be expressed in hexadecimal format, and the "_count"
and "_mapcount" members will always be expressed in decimal format.
Otherwise, all other members will be displayed in hexadecimal format
unless the current output radix is 10 and the member is a signed/unsigned
integer. Members that are data structures may be specified by the data
structure's member name, or expanded to specify a member of that data
structure. For example, "-m lru" refers to a list_head data structure, in
which case both the list_head.next and list_head.prev pointer values will
be displayed; if "-m lru.next" is specified, just the list_head.next value
will be displayed.
.
* Support enhancement for the 32-bit MIPS architecture that retrieves the
per-cpu registers from the NT_PRSTATUS notes stored in the header of
compressed kdump dumpfiles.
.
* Fix to remove an invalid warning message on ARM64 if a crash session is
invoked with the "-d<number>" debug flag. Without the patch, the invalid
message is "WARNING: SPARSEMEM_EX: questionable section values".
.
* Remove the leftover ".constructor" build file in the extensions
subdirectory when "make extensions" is complete, and update the top-level
.gitignore file to ignore post-build extensions subdirectory files.
.
* Fix for a segmentation violation generated by the "help -[n|D]" options on
ARM64 compressed kdumps.
.
* Additional output for the "help [-D|-n]" options on ARM64. For ELF kdump
vmcores and compressed kdumps, the elf_prstatus structure in each
NT_PRSTATUS note will be translated.
.
* The "help -r" option has been extended to dump the ARM64 registers stored
in each per-cpu NT_PRSTATUS note in compressed kdump and ELF kdump
dumpfiles.
.
* Fix for the ARM64 page size determination on Linux 4.1 and later kernels.
Without the patch, the crash session fails during initialization with the
message "crash: invalid/unsupported page size: 98304" on kernels with 64K
pages. On kernels with 4K pages, the message is "crash:
invalid/unsupported page size: 6144". In addition, the "-p <page-size>"
command line override option had no effect on ARM64; that has been fixed
as well.
.
* Fix for the DATE display in the initial system banner and by the "sys"
command to account for the Linux 3.17 change that moved the "timekeeper"
symbol and structure into a containing tk_core structure; the
"shadow_timekeeper" timekeeper will be used as an alternative. Without
the patch, the DATE shows something within a few hours of the Linux epoch,
such as "Wed Dec 31 18:00:00 1969".
.
* Fixes for the translation of ARM64 PTEs, as displayed by the "vm -p" and
"vtop" commands. Without the patch, if "vm -p" references a swapped-out
page on Linux 4.0 and later kernels, the SWAP location may indicate
"(unknown swap location)", and will show an invalid OFFSET value; on Linux
3.13 and later kernels, running "vtop" on a user virtual address
incorrectly translates the PTE contents of swapped out pages by showing a
PHYSICAL address and FLAGS translation instead of the SWAP device and
OFFSET. It is possible that there may be PTE bit translation errors on
other kernel versions; the patch addresses the changes in ARM64 PTE bit
definitions made in Linux 3.11, 3.13, and 4.0 kernels.
.
* Enhanced the "struct.member" display capability of the "struct", "union",
"task", "list" and "tree" commands. If a specified structure member
contains an embedded structure, the output may be restricted to just the
embedded structure by expressing the .member argument as "member.member".
If a specified structure member is an array, the output may be restricted
to a single array element by expressing the .member argument as
"member[index]". Furthermore, these embedded member specifications may
extend beyond one level deep, for example, by expressing the member
argument as "member.member.member", or "member[index].member".
.
* Fix for any command that passes strings to gdb for evaluation, where the
string contains a parentheses-within-parentheses expression along with a
">" or ">>" operator inside the outermost set of parentheses. Without the
patch, a command such as the following fails like so:
.
crash> p ((1+1) >> 1)
p: gdb request failed: p ((1+1)
crash>
.
* Fix for the handling of ARM64 kernel module per-cpu symbols. Without the
patch, if the debuginfo data of an ARM64 kernel module that contains a
per-cpu section is loaded by "mod -s <module>" or "mod -S", commands such
as "bt" or "sym" may incorrectly translate the module's virtual addresses
to symbol names.
.
* Fix to support the Linux version increment from 3 to 4. (Closes: #699367)
Without the patch, both dumpfile and live sessions fail during
initialization, issuing the message "WARNING: kernel version inconsistency
between vmlinux and dumpfile" or "WARNING: kernel version inconsistency
between vmlinux and live memory", followed by the nonsensical fatal error
message "crash: incompatible arguments: vmlinux is not SMP -- vmcore is
SMP" or "crash: incompatible arguments: vmlinux is not SMP -- live system
is SMP"
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