From: Ingo Molnar <mingo@kernel.org>
To: Nathan Chancellor <nathan@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"David S. Miller" <davem@davemloft.net>,
Ard Biesheuvel <ardb@kernel.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Jonathan Corbet <corbet@lwn.net>,
Al Viro <viro@zeniv.linux.org.uk>,
llvm@lists.linux.dev
Subject: [PATCH] headers/deps: Add header dependencies to .c files: <linux/ptrace_api.h>
Date: Sat, 8 Jan 2022 11:32:31 +0100 [thread overview]
Message-ID: <YdloP5TfDSTURAh3@gmail.com> (raw)
In-Reply-To: <YdYQu9YxNw0CxJRn@archlinux-ax161>
* Nathan Chancellor <nathan@kernel.org> wrote:
> 1. kernel/stackleak.c build failure:
>
> $ make -skj"$(nproc)" ARCH=x86_64 allmodconfig kernel/stackleak.o
> kernel/stackleak.c: In function ‘stackleak_erase’:
> kernel/stackleak.c:92:13: error: implicit declaration of function ‘on_thread_stack’; did you mean ‘setup_thread_stack’? [-Werror=implicit-function-declaration]
So it turns out that my build environment didn't have the stackleak code
enabled at all:
kepler:~/mingo.tip.git> make ARCH=x86_64 allmodconfig
#
# configuration written to .config
#
kepler:~/mingo.tip.git> grep -E 'STACKLEAK|GCC_PLUGIN' .config
CONFIG_HAVE_ARCH_STACKLEAK=y
CONFIG_HAVE_GCC_PLUGINS=y
... because it failed this condition:
menuconfig GCC_PLUGINS
...
depends on $(success,test -e $(shell,$(CC) -print-file-name=plugin)/include/plugin-version.h)
... because there were no plugin headers:
kepler:~/mingo.tip.git> gcc -print-file-name=plugin
/usr/lib/gcc/x86_64-linux-gnu/10/plugin
kepler:~/mingo.tip.git> ls $(gcc -print-file-name=plugin)/include/
ls: cannot access '/usr/lib/gcc/x86_64-linux-gnu/10/plugin/include/': No such file or directory
... because I needed to install the plugin-development packages for gcc-10.
After installing those I have stackleak:
kepler:~/mingo.tip.git> grep STACKLEAK .config
CONFIG_HAVE_ARCH_STACKLEAK=y
CONFIG_GCC_PLUGIN_STACKLEAK=y
CONFIG_STACKLEAK_TRACK_MIN_SIZE=100
CONFIG_STACKLEAK_METRICS=y
CONFIG_STACKLEAK_RUNTIME_DISABLE=y
and was able to reproduce your build failure. :-)
> This is fixed with the following diff although I am unsure if that is as
> minimal as it should be.
>
> diff --git a/kernel/stackleak.c b/kernel/stackleak.c
> index ce161a8e8d97..d67c5475183b 100644
> --- a/kernel/stackleak.c
> +++ b/kernel/stackleak.c
> @@ -10,8 +10,10 @@
> * reveal and blocks some uninitialized stack variable attacks.
> */
>
> +#include <asm/processor_api.h>
> #include <linux/stackleak.h>
> #include <linux/kprobes.h>
> +#include <linux/align.h>
Yeah - I used a simpler & more generic header: <linux/ptrace_api.h> - see
the patch below.
But your solution is functionally equivalent. This fix will be included in
-v2, hopefully released later today.
Thanks,
Ingo
===============>
From: Ingo Molnar <mingo@kernel.org>
Date: Sat, 8 Jan 2022 11:29:17 +0100
Subject: [PATCH] headers/deps: Add header dependencies to .c files: <linux/ptrace_api.h>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
kernel/stackleak.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/stackleak.c b/kernel/stackleak.c
index ce161a8e8d97..fde49e2f209a 100644
--- a/kernel/stackleak.c
+++ b/kernel/stackleak.c
@@ -10,6 +10,7 @@
* reveal and blocks some uninitialized stack variable attacks.
*/
+#include <linux/ptrace_api.h>
#include <linux/stackleak.h>
#include <linux/kprobes.h>
next prev parent reply other threads:[~2022-01-08 10:32 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-02 21:57 [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Ingo Molnar
2022-01-03 10:11 ` Greg Kroah-Hartman
2022-01-03 11:12 ` Ingo Molnar
2022-01-03 13:46 ` Greg Kroah-Hartman
2022-01-03 16:29 ` Ingo Molnar
2022-01-10 10:28 ` Peter Zijlstra
2022-01-04 14:10 ` [PATCH] per_task: Remove the PER_TASK_BYTES hard-coded constant Ingo Molnar
2022-01-04 15:14 ` Andy Shevchenko
2022-01-04 23:27 ` Ingo Molnar
2022-01-04 17:51 ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Arnd Bergmann
2022-01-05 0:05 ` Ingo Molnar
2022-01-05 1:37 ` Arnd Bergmann
2022-01-05 9:37 ` Andy Shevchenko
2022-01-04 14:05 ` [PATCH] per_task: Implement single template to define 'struct task_struct_per_task' fields and offsets Ingo Molnar
2022-01-03 13:54 ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Kirill A. Shutemov
2022-01-04 10:54 ` Ingo Molnar
2022-01-04 13:34 ` Greg Kroah-Hartman
2022-01-04 13:54 ` [PATCH] headers/uninline: Uninline single-use function: kobject_has_children() Ingo Molnar
2022-01-04 15:09 ` Greg Kroah-Hartman
2022-01-04 15:14 ` Greg Kroah-Hartman
2022-01-05 0:11 ` Ingo Molnar
2022-01-05 15:23 ` Greg Kroah-Hartman
2022-01-06 11:26 ` Ingo Molnar
2022-01-03 17:54 ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Nathan Chancellor
2022-01-04 10:47 ` Ingo Molnar
2022-01-04 10:56 ` [DEBUG PATCH] DO NOT MERGE: Enable SHADOW_CALL_STACK on GCC builds, for build testing Ingo Molnar
2022-01-04 11:02 ` [PATCH] headers/deps: dcache: Move the ____cacheline_aligned attribute to the head of the definition Ingo Molnar
2022-01-04 15:05 ` kernel test robot
2022-01-04 17:51 ` Nathan Chancellor
2022-01-05 0:20 ` Ingo Molnar
2022-01-05 0:26 ` [PATCH] headers/deps: Attribute placement fixes for Clang & GCC Ingo Molnar
2022-01-04 11:19 ` [TREE] "Fast Kernel Headers" Tree WIP/development branch Ingo Molnar
2022-01-04 17:25 ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Nick Desaulniers
2022-01-05 0:43 ` Ingo Molnar
2022-01-04 17:50 ` Nathan Chancellor
2022-01-05 0:35 ` [PATCH] x86/kbuild: Enable CONFIG_KALLSYMS_ALL=y in the defconfigs Ingo Molnar
2022-01-08 21:57 ` [tip: x86/build] " tip-bot2 for Ingo Molnar
2022-01-05 0:40 ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Ingo Molnar
2022-01-05 1:07 ` Ingo Molnar
2022-01-05 5:20 ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel'\''s "Dependency Hell Paul Zimmerman
2022-01-05 21:42 ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Nathan Chancellor
2022-01-08 10:32 ` Ingo Molnar [this message]
2022-01-08 11:08 ` [PATCH] FIX: headers/deps: uapi/headers: Create usr/include/uapi symbolic link Ingo Molnar
2022-01-08 11:18 ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Ingo Molnar
2022-01-08 11:38 ` [PATCH] x86/bitops: Remove unused __sw_hweight64() assembly implementation Ingo Molnar
2022-01-08 11:49 ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Ingo Molnar
2022-01-08 12:17 ` Ingo Molnar
2022-01-10 20:03 ` Nathan Chancellor
2022-01-10 20:05 ` Nathan Chancellor
2022-01-05 22:33 ` Nathan Chancellor
2022-01-08 15:16 ` Ingo Molnar
2022-01-07 0:29 ` Nathan Chancellor
2022-01-08 11:54 ` Ingo Molnar
2022-01-04 12:36 ` Willy Tarreau
2022-01-04 16:05 ` Andy Shevchenko
2022-01-04 16:18 ` Andy Shevchenko
2022-01-15 0:42 ` Paul E. McKenney
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