Pull Kconfig updates from Masahiro Yamada:
- error out if a user specifies a directory instead of a file from
"Save" menu of GUI interfaces
- do not overwrite .config if there is no change in the configuration
- create parent directories as needed when a user specifies a new file
path from "Save" menu of menuconfig/nconfig
- fix potential buffer overflow
- some trivial cleanups
* tag 'kconfig-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig: make conf_get_autoconfig_name() static
kconfig: use snprintf for formatting pathnames
kconfig: remove useless NULL pointer check in conf_write_dep()
kconfig: make parent directories for the saved .config as needed
kconfig: do not write .config if the content is the same
kconfig: do not accept a directory for configuration output
kconfig: remove trailing whitespaces
kconfig: Make nconf-cfg.sh executable
Patch series "gdb script for kconfig and timer list".
This is a handful of changes to the kernel's gdb scripts to do some more
debugging with kgdb. The first patch allows the vmlinux to be reloaded
from where it was specified on the command line so that this set of
scripts can be used from anywhere. The second patch adds a script to
dump the config.gz to a file on the host debugging machine. The third
patch adds some rb tree utilities and the last patch uses those rb tree
walking utilities to dump out the contents of /proc/timer_list from a
system under debug.
This patch (of 5):
If I run 'gdb <path/to/vmlinux>' and there's the vmlinux-gdb.py file
there I can properly see symbols and use the lx commands provided by the
GDB scripts. But once I run 'lx-symbols' at the command prompt, gdb
reloads the vmlinux symbols assuming that this script was run from the
directory that has vmlinux at the root. That isn't always true, but we
could just look and see what symbols were already loaded and use that
instead. Let's do that so this can work by being invoked anywhere.
Link: http://lkml.kernel.org/r/20190325184522.260535-2-swboyd@chromium.org
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Nikolay Borisov <n.borisov.lkml@gmail.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Jackie Liu <liuyun01@kylinos.cn>
Cc: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Valid pathnames will never exceed PATH_MAX, but these file names
are unsanitized and can cause buffer overflow if set incorrectly.
Use snprintf to avoid this. This was flagged during a Coverity scan
of the coreboot project, which also uses kconfig for its build system.
Signed-off-by: Jacob Garber <jgarber1@ualberta.ca>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
conf_write_dep() has just one caller:
conf_write_dep("include/config/auto.conf.cmd");
"name" always points to a valid string.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The script broke on parsing function prototype for bpf_strtoul(). This
is because the last argument for the function is a pointer to an
"unsigned long". The current version of the script only accepts "const"
and "struct", but not "unsigned", at the beginning of argument types
made of several words.
One solution could be to add "unsigned" to the list, but the issue could
come up again in the future (what about "long int"?). It turns out we do
not need to have such restrictions on the words: so let's simply accept
any series of words instead.
Reported-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Use gen_rtx_set instead of gen_rtx_SET. The former is a wrapper macro
that handles the difference between GCC versions implementing
the latter.
This fixes the following error on my system with g++ 5.4.0 as the host
compiler
HOSTCXX -fPIC scripts/gcc-plugins/arm_ssp_per_task_plugin.o
scripts/gcc-plugins/arm_ssp_per_task_plugin.c:42:14: error: macro "gen_rtx_SET" requires 3 arguments, but only 2 given
mask)),
^
scripts/gcc-plugins/arm_ssp_per_task_plugin.c: In function ‘unsigned int arm_pertask_ssp_rtl_execute()’:
scripts/gcc-plugins/arm_ssp_per_task_plugin.c:39:20: error: ‘gen_rtx_SET’ was not declared in this scope
emit_insn_before(gen_rtx_SET
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Fixes: 189af46571 ("ARM: smp: add support for per-task stack canaries")
Cc: stable@vger.kernel.org
Tested-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
With menuconfig / nconfig, users can input any file path from the
"Save" menu, but it fails if the parent directory does not exist.
Why not create the parent directory automatically. I think this is
a user-friendly behavior.
I changed the error messages in menuconfig / nconfig.
"Nonexistent directory" is no longer the most likely reason of the
failure. Perhaps, the user specified the existing directory, or
attempted to write to the location without write permission.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Kconfig updates the .config when it exits even if its content is
exactly the same as before. Since its timestamp becomes newer than
that of other build artifacts, additional processing is invoked,
which is annoying.
- syncconfig is invoked to update include/config/auto.conf, etc.
- kernel/configs.o is recompiled if CONFIG_IKCONFIG is enabled,
then vmlinux is relinked as well.
If the .config is not changed at all, we do not have to even
touch it. Just bail out showing "No change to .config".
$ make allmodconfig
scripts/kconfig/conf --allmodconfig Kconfig
#
# configuration written to .config
#
$ make allmodconfig
scripts/kconfig/conf --allmodconfig Kconfig
#
# No change to .config
#
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Currently, conf_write() can be called with a directory name instead
of a file name. As far as I see, this can happen for menuconfig,
nconfig, gconfig.
If it is given with a directory path, conf_write() kindly appends
getenv("KCONFIG_CONFIG"), but this ends up with hacky dir/basename
handling, and screwed up in corner-cases like "what if KCONFIG_CONFIG
is an absolute path?" as discussed before:
https://patchwork.kernel.org/patch/9910037/
Since conf_write() is already messed up, I'd say "do not do it".
Please pass a file path all the time. If a directory path is specified
for the configuration output, conf_write() will simply error out.
Now that the tmp file is created in the same directory as the .config,
the previously reported "what if KCONFIG_CONFIG points to a different
file system?" has been solved.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Nicolas Porcel <nicolasporcel06@gmail.com>
There are still some trailing whitespaces under scripts/kconfig/tests/,
but they must be kept. Otherwise, "make testconfig" would break.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Pull documentation updates from Jonathan Corbet:
"A reasonably busy cycle for docs, including:
- Lots of work on the Chinese and Italian translations
- Some license-rules clarifications from Christoph
- Various build-script fixes
- A new document on memory models
- RST conversion of the live-patching docs
- The usual collection of typo fixes and corrections"
* tag 'docs-5.2' of git://git.lwn.net/linux: (140 commits)
docs/livepatch: Unify style of livepatch documentation in the ReST format
docs: livepatch: convert docs to ReST and rename to *.rst
scripts/documentation-file-ref-check: detect broken :doc:`foo`
scripts/documentation-file-ref-check: don't parse Next/ dir
LICENSES: Rename other to deprecated
LICENSES: Clearly mark dual license only licenses
docs: Don't reference the ZLib license in license-rules.rst
docs/vm: Minor editorial changes in the THP and hugetlbfs
docs/vm: add documentation of memory models
doc:it_IT: translation alignment
doc: fix typo in PGP guide
dontdiff: update with Kconfig build artifacts
docs/zh_CN: fix typos in 1.Intro.rst file
docs/zh_CN: redirect CoC docs to Chinese version
doc: mm: migration doesn't use FOLL_SPLIT anymore
docs: doc-guide: remove the extension from .rst files
doc: kselftest: Fix KBUILD_OUTPUT usage instructions
docs: trace: fix some Sphinx warnings
docs: speculation.txt: mark example blocks as such
docs: ntb.txt: add blank lines to clean up some Sphinx warnings
...
Pull Kbuild updates from Masahiro Yamada:
- allow users to invoke 'make' out of the source tree
- refactor scripts/mkmakefile
- deprecate KBUILD_SRC, which was used to track the source tree
location for O= build.
- fix recordmcount.pl in case objdump output is localized
- turn unresolved symbols in external modules to errors from warnings
by default; pass KBUILD_MODPOST_WARN=1 to get them back to warnings
- generate modules.builtin.modinfo to collect .modinfo data from
built-in modules
- misc Makefile cleanups
* tag 'kbuild-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (21 commits)
.gitignore: add more all*.config patterns
moduleparam: Save information about built-in modules in separate file
Remove MODULE_ALIAS() calls that take undefined macro
.gitignore: add leading and trailing slashes to generated directories
scripts/tags.sh: fix direct execution of scripts/tags.sh
scripts: override locale from environment when running recordmcount.pl
samples: kobject: allow CONFIG_SAMPLE_KOBJECT to become y
samples: seccomp: turn CONFIG_SAMPLE_SECCOMP into a bool option
kbuild: move Documentation to vmlinux-alldirs
kbuild: move samples/ to KBUILD_VMLINUX_OBJS
modpost: make KBUILD_MODPOST_WARN also configurable for external modules
kbuild: check arch/$(SRCARCH)/include/generated before out-of-tree build
kbuild: remove unneeded dependency for include/config/kernel.release
memory: squash drivers/memory/Makefile.asm-offsets
kbuild: use $(srctree) instead of KBUILD_SRC to check out-of-tree build
kbuild: mkmakefile: generate a simple wrapper of top Makefile
kbuild: mkmakefile: do not check the generated Makefile marker
kbuild: allow Kbuild to start from any directory
kbuild: pass $(MAKECMDGOALS) to sub-make as is
kbuild: fix warning "overriding recipe for target 'Makefile'"
...
Pull networking updates from David Miller:
"Highlights:
1) Support AES128-CCM ciphers in kTLS, from Vakul Garg.
2) Add fib_sync_mem to control the amount of dirty memory we allow to
queue up between synchronize RCU calls, from David Ahern.
3) Make flow classifier more lockless, from Vlad Buslov.
4) Add PHY downshift support to aquantia driver, from Heiner
Kallweit.
5) Add SKB cache for TCP rx and tx, from Eric Dumazet. This reduces
contention on SLAB spinlocks in heavy RPC workloads.
6) Partial GSO offload support in XFRM, from Boris Pismenny.
7) Add fast link down support to ethtool, from Heiner Kallweit.
8) Use siphash for IP ID generator, from Eric Dumazet.
9) Pull nexthops even further out from ipv4/ipv6 routes and FIB
entries, from David Ahern.
10) Move skb->xmit_more into a per-cpu variable, from Florian
Westphal.
11) Improve eBPF verifier speed and increase maximum program size,
from Alexei Starovoitov.
12) Eliminate per-bucket spinlocks in rhashtable, and instead use bit
spinlocks. From Neil Brown.
13) Allow tunneling with GUE encap in ipvs, from Jacky Hu.
14) Improve link partner cap detection in generic PHY code, from
Heiner Kallweit.
15) Add layer 2 encap support to bpf_skb_adjust_room(), from Alan
Maguire.
16) Remove SKB list implementation assumptions in SCTP, your's truly.
17) Various cleanups, optimizations, and simplifications in r8169
driver. From Heiner Kallweit.
18) Add memory accounting on TX and RX path of SCTP, from Xin Long.
19) Switch PHY drivers over to use dynamic featue detection, from
Heiner Kallweit.
20) Support flow steering without masking in dpaa2-eth, from Ioana
Ciocoi.
21) Implement ndo_get_devlink_port in netdevsim driver, from Jiri
Pirko.
22) Increase the strict parsing of current and future netlink
attributes, also export such policies to userspace. From Johannes
Berg.
23) Allow DSA tag drivers to be modular, from Andrew Lunn.
24) Remove legacy DSA probing support, also from Andrew Lunn.
25) Allow ll_temac driver to be used on non-x86 platforms, from Esben
Haabendal.
26) Add a generic tracepoint for TX queue timeouts to ease debugging,
from Cong Wang.
27) More indirect call optimizations, from Paolo Abeni"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1763 commits)
cxgb4: Fix error path in cxgb4_init_module
net: phy: improve pause mode reporting in phy_print_status
dt-bindings: net: Fix a typo in the phy-mode list for ethernet bindings
net: macb: Change interrupt and napi enable order in open
net: ll_temac: Improve error message on error IRQ
net/sched: remove block pointer from common offload structure
net: ethernet: support of_get_mac_address new ERR_PTR error
net: usb: smsc: fix warning reported by kbuild test robot
staging: octeon-ethernet: Fix of_get_mac_address ERR_PTR check
net: dsa: support of_get_mac_address new ERR_PTR error
net: dsa: sja1105: Fix status initialization in sja1105_get_ethtool_stats
vrf: sit mtu should not be updated when vrf netdev is the link
net: dsa: Fix error cleanup path in dsa_init_module
l2tp: Fix possible NULL pointer dereference
taprio: add null check on sched_nest to avoid potential null pointer dereference
net: mvpp2: cls: fix less than zero check on a u32 variable
net_sched: sch_fq: handle non connected flows
net_sched: sch_fq: do not assume EDT packets are ordered
net: hns3: use devm_kcalloc when allocating desc_cb
net: hns3: some cleanup for struct hns3_enet_ring
...
