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The debug.config file is really great to easily enable a bunch of
general debugging features on a CI-like setup. But it would be great to
also include core networking debugging config.
A few CI's validating features from the Net tree also enable a few other
debugging options on top of debug.config. A small selection is quite
generic for the whole net tree. They validate some assumptions in
different parts of the core net tree. As suggested by Jakub Kicinski in
[1], having them added to this debug.config file would help other CIs
using network features to find bugs in this area.
Note that the two REFCNT configs also select REF_TRACKER, which doesn't
seem to be an issue.
Link: https://lore.kernel.org/netdev/[email protected]/T/ [1]
Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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Currently the Kconfig fragments in kernel/configs and arch/*/configs
that aren't used internally aren't discoverable through "make help",
which consists of hard-coded lists of config fragments. Instead, list
all the fragment targets that have a "# Help: " comment prefix so the
targets can be generated dynamically.
Add logic to the Makefile to search for and display the fragment and
comment. Add comments to fragments that are intended to be direct targets.
Signed-off-by: Kees Cook <[email protected]>
Co-developed-by: Masahiro Yamada <[email protected]>
Acked-by: Michael Ellerman <[email protected]> (powerpc)
Reviewed-by: Nicolas Schier <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>
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Previously, I failed to realize that Kees' patch [1] has not been merged
into the mainline yet, and dropped DEBUG_INFO=y too eagerly from the
mainline. As the results, "make debug.config" won't be able to flip
DEBUG_INFO=n from the existing .config. This should close the gaps of a
few weeks before Kees' patch is there, and work regardless of their
merging status anyway.
Link: https://lore.kernel.org/all/[email protected]/ [1]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Qian Cai <[email protected]>
Reported-by: Daniel Thompson <[email protected]>
Reviewed-by: Daniel Thompson <[email protected]>
Cc: Kees Cook <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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CONFIG_DEBUG_INFO can't be set by user directly, so set
CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y instead.
Otherwise, we end up with no debuginfo in vmlinux which is a big no-no
for kernel debugging.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Qian Cai <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Some general debugging features like kmemleak, KASAN, lockdep, UBSAN etc
help fix many viruses like a microscope. On the other hand, those
features are scatter around and mixed up with more situational debugging
options making them difficult to consume properly. This cold help
amplify the general debugging/testing efforts and help establish
sensitive default values for those options across the broad. This could
also help different distros to collaborate on maintaining debug-flavored
kernels.
The config is based on years' experiences running daily CI inside the
largest enterprise Linux distro company to seek regressions on
linux-next builds on different bare-metal and virtual platforms. It can
be used for example,
$ make ARCH=arm64 defconfig debug.config
Since KASAN and KCSAN can't be enabled together, we will need to create
a separate one for KCSAN later as well.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Qian Cai <[email protected]>
Acked-by: Paul E. McKenney <[email protected]>
Cc: Marco Elver <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Daniel Thompson <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Naresh Kamboju <[email protected]>
Cc: "Stephen Rothwell" <[email protected]>
Cc: Randy Dunlap <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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