From: Kees Cook <keescook@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>,
Francis Laniel <laniel_francis@privacyrequired.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Daniel Micay <danielmicay@gmail.com>,
Bart Van Assche <bvanassche@acm.org>,
David Gow <davidgow@google.com>,
linux-mm@kvack.org, clang-built-linux@googlegroups.com,
linux-hardening@vger.kernel.org
Subject: [PATCH for-next 15/25] fortify: Move remaining fortify helpers into fortify-string.h
Date: Sun, 22 Aug 2021 00:51:12 -0700 [thread overview]
Message-ID: <20210822075122.864511-16-keescook@chromium.org> (raw)
In-Reply-To: <20210822075122.864511-1-keescook@chromium.org>
When commit a28a6e860c6c ("string.h: move fortified functions definitions
in a dedicated header.") moved the fortify-specific code, some helpers
were left behind. Move the remaining fortify-specific helpers into
fortify-string.h so they're together where they're used. This requires
that any FORTIFY helper function prototypes be conditionally built to
avoid "no prototype" warnings. Additionally removes unused helpers.
Acked-by: Francis Laniel <laniel_francis@privacyrequired.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
include/linux/fortify-string.h | 7 +++++++
include/linux/string.h | 9 ---------
lib/string_helpers.c | 2 ++
3 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/include/linux/fortify-string.h b/include/linux/fortify-string.h
index c1be37437e77..7e67d02764db 100644
--- a/include/linux/fortify-string.h
+++ b/include/linux/fortify-string.h
@@ -2,6 +2,13 @@
#ifndef _LINUX_FORTIFY_STRING_H_
#define _LINUX_FORTIFY_STRING_H_
+#define __FORTIFY_INLINE extern __always_inline __attribute__((gnu_inline))
+#define __RENAME(x) __asm__(#x)
+
+void fortify_panic(const char *name) __noreturn __cold;
+void __read_overflow(void) __compiletime_error("detected read beyond size of object (1st parameter)");
+void __read_overflow2(void) __compiletime_error("detected read beyond size of object (2nd parameter)");
+void __write_overflow(void) __compiletime_error("detected write beyond size of object (1st parameter)");
#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
extern void *__underlying_memchr(const void *p, int c, __kernel_size_t size) __RENAME(memchr);
diff --git a/include/linux/string.h b/include/linux/string.h
index b48d2d28e0b1..9473f81b9db2 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -249,15 +249,6 @@ static inline const char *kbasename(const char *path)
return tail ? tail + 1 : path;
}
-#define __FORTIFY_INLINE extern __always_inline __attribute__((gnu_inline))
-#define __RENAME(x) __asm__(#x)
-
-void fortify_panic(const char *name) __noreturn __cold;
-void __read_overflow(void) __compiletime_error("detected read beyond size of object passed as 1st parameter");
-void __read_overflow2(void) __compiletime_error("detected read beyond size of object passed as 2nd parameter");
-void __read_overflow3(void) __compiletime_error("detected read beyond size of object passed as 3rd parameter");
-void __write_overflow(void) __compiletime_error("detected write beyond size of object passed as 1st parameter");
-
#if !defined(__NO_FORTIFY) && defined(__OPTIMIZE__) && defined(CONFIG_FORTIFY_SOURCE)
#include <linux/fortify-string.h>
#endif
diff --git a/lib/string_helpers.c b/lib/string_helpers.c
index e9433caab217..1274f45ffaf4 100644
--- a/lib/string_helpers.c
+++ b/lib/string_helpers.c
@@ -879,9 +879,11 @@ char *strreplace(char *s, char old, char new)
}
EXPORT_SYMBOL(strreplace);
+#ifdef CONFIG_FORTIFY_SOURCE
void fortify_panic(const char *name)
{
pr_emerg("detected buffer overflow in %s\n", name);
BUG();
}
EXPORT_SYMBOL(fortify_panic);
+#endif /* CONFIG_FORTIFY_SOURCE */
--
2.30.2
next prev parent reply other threads:[~2021-08-22 7:57 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-22 7:50 [PATCH for-next 00/25] Prepare for better FORTIFY_SOURCE Kees Cook
2021-08-22 7:50 ` [PATCH for-next 01/25] scsi: ibmvscsi: Avoid multi-field memset() overflow by aiming at srp Kees Cook
2021-08-22 7:50 ` [PATCH for-next 02/25] powerpc: Split memset() to avoid multi-field overflow Kees Cook
2021-08-22 7:51 ` [PATCH for-next 03/25] stddef: Fix kerndoc for sizeof_field() and offsetofend() Kees Cook
2021-08-22 7:51 ` [PATCH for-next 04/25] stddef: Introduce struct_group() helper macro Kees Cook
2021-08-22 7:51 ` [PATCH for-next 05/25] cxl/core: Replace unions with struct_group() Kees Cook
2021-08-22 7:51 ` [PATCH for-next 06/25] bnxt_en: Use struct_group_attr() for memcpy() region Kees Cook
2021-08-22 7:51 ` [PATCH for-next 07/25] iommu/amd: Use struct_group() " Kees Cook
2021-08-22 7:51 ` [PATCH for-next 08/25] drm/mga/mga_ioc32: " Kees Cook
2021-08-22 7:51 ` [PATCH for-next 09/25] HID: cp2112: " Kees Cook
2021-08-22 7:51 ` [PATCH for-next 10/25] HID: roccat: Use struct_group() to zero kone_mouse_event Kees Cook
2021-08-22 7:51 ` [PATCH for-next 11/25] can: flexcan: Use struct_group() to zero struct flexcan_regs regions Kees Cook
2021-08-22 7:51 ` [PATCH for-next 12/25] cm4000_cs: Use struct_group() to zero struct cm4000_dev region Kees Cook
2021-08-22 7:51 ` [PATCH for-next 13/25] compiler_types.h: Remove __compiletime_object_size() Kees Cook
2021-08-23 6:43 ` Rasmus Villemoes
2021-08-25 19:43 ` Nick Desaulniers
2021-08-22 7:51 ` [PATCH for-next 14/25] lib/string: Move helper functions out of string.c Kees Cook
2021-08-25 21:48 ` Nick Desaulniers
2021-08-26 2:47 ` Kees Cook
2021-08-26 18:08 ` Nick Desaulniers
2021-08-22 7:51 ` Kees Cook [this message]
2021-08-25 21:59 ` [PATCH for-next 15/25] fortify: Move remaining fortify helpers into fortify-string.h Nick Desaulniers
2021-08-22 7:51 ` [PATCH for-next 16/25] fortify: Explicitly disable Clang support Kees Cook
2021-08-25 19:41 ` Nick Desaulniers
2021-08-22 7:51 ` [PATCH for-next 17/25] fortify: Fix dropped strcpy() compile-time write overflow check Kees Cook
2021-08-25 21:55 ` Nick Desaulniers
2021-08-22 7:51 ` [PATCH for-next 18/25] fortify: Prepare to improve strnlen() and strlen() warnings Kees Cook
2021-08-25 22:01 ` Nick Desaulniers
2021-08-22 7:51 ` [PATCH for-next 19/25] fortify: Allow strlen() and strnlen() to pass compile-time known lengths Kees Cook
2021-08-25 22:05 ` Nick Desaulniers
2021-08-26 2:56 ` Kees Cook
2021-08-26 18:02 ` Nick Desaulniers
2021-08-22 7:51 ` [PATCH for-next 20/25] fortify: Add compile-time FORTIFY_SOURCE tests Kees Cook
2021-08-22 7:51 ` [PATCH for-next 21/25] lib: Introduce CONFIG_TEST_MEMCPY Kees Cook
2021-08-24 7:00 ` David Gow
2021-08-25 2:32 ` Kees Cook
2021-10-18 15:46 ` Arnd Bergmann
2021-10-18 19:28 ` Kees Cook
2021-08-22 7:51 ` [PATCH for-next 22/25] string.h: Introduce memset_after() for wiping trailing members/padding Kees Cook
2021-08-22 7:51 ` [PATCH for-next 23/25] xfrm: Use memset_after() to clear padding Kees Cook
2021-08-22 7:51 ` [PATCH for-next 24/25] string.h: Introduce memset_startat() for wiping trailing members and padding Kees Cook
2021-08-22 7:51 ` [PATCH for-next 25/25] btrfs: Use memset_startat() to clear end of struct Kees Cook
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210822075122.864511-16-keescook@chromium.org \
--to=keescook@chromium.org \
--cc=bvanassche@acm.org \
--cc=clang-built-linux@googlegroups.com \
--cc=danielmicay@gmail.com \
--cc=davidgow@google.com \
--cc=laniel_francis@privacyrequired.com \
--cc=linux-hardening@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux@rasmusvillemoes.dk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).