- 14 2月, 2015 1 次提交
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由 Andrey Ryabinin 提交于
Recently instrumentation of builtin functions calls was removed from GCC 5.0. To check the memory accessed by such functions, userspace asan always uses interceptors for them. So now we should do this as well. This patch declares memset/memmove/memcpy as weak symbols. In mm/kasan/kasan.c we have our own implementation of those functions which checks memory before accessing it. Default memset/memmove/memcpy now now always have aliases with '__' prefix. For files that built without kasan instrumentation (e.g. mm/slub.c) original mem* replaced (via #define) with prefixed variants, cause we don't want to check memory accesses there. Signed-off-by: NAndrey Ryabinin <a.ryabinin@samsung.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Konstantin Serebryany <kcc@google.com> Cc: Dmitry Chernenkov <dmitryc@google.com> Signed-off-by: NAndrey Konovalov <adech.fo@gmail.com> Cc: Yuri Gribov <tetra2005@gmail.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Christoph Lameter <cl@linux.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 13 10月, 2013 3 次提交
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由 Kees Cook 提交于
Counts available alignment positions across all e820 maps, and chooses one randomly for the new kernel base address, making sure not to collide with unsafe memory areas. Signed-off-by: NKees Cook <keescook@chromium.org> Link: http://lkml.kernel.org/r/1381450698-28710-5-git-send-email-keescook@chromium.orgSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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由 Kees Cook 提交于
Adds potential sources of randomness: RDRAND, RDTSC, or the i8254. This moves the pre-alternatives inline rdrand function into the header so both pieces of code can use it. Availability of RDRAND is then controlled by CONFIG_ARCH_RANDOM, if someone wants to disable it even for kASLR. Signed-off-by: NKees Cook <keescook@chromium.org> Link: http://lkml.kernel.org/r/1381450698-28710-4-git-send-email-keescook@chromium.orgSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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由 Kees Cook 提交于
This allows decompress_kernel to return a new location for the kernel to be relocated to. Additionally, enforces CONFIG_PHYSICAL_START as the minimum relocation position when building with CONFIG_RELOCATABLE. With CONFIG_RANDOMIZE_BASE set, the choose_kernel_location routine will select a new location to decompress the kernel, though here it is presently a no-op. The kernel command line option "nokaslr" is introduced to bypass these routines. Signed-off-by: NKees Cook <keescook@chromium.org> Link: http://lkml.kernel.org/r/1381450698-28710-3-git-send-email-keescook@chromium.orgSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 29 1月, 2013 1 次提交
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由 H. Peter Anvin 提交于
Use the new sentinel field to detect bootloaders which fail to follow protocol and don't initialize fields in struct boot_params that they do not explicitly initialize to zero. Based on an original patch and research by Yinghai Lu. Changed by hpa to be invoked both in the decompression path and in the kernel proper; the latter for the case where a bootloader takes over decompression. Originally-by: NYinghai Lu <yinghai@kernel.org> Link: http://lkml.kernel.org/r/1359058816-7615-26-git-send-email-yinghai@kernel.orgSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 22 7月, 2012 4 次提交
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由 Gokul Caushik 提交于
CONFIG_EARLY_PRINTK is the only feature that might use command line parsing in the decompression stage. If it is disabled then we can exclude the related code to save space. This can result in an estimated space savings of 2240 bytes from the compressed kernel image. Signed-off-by: NJoe Millenbach <jmillenbach@gmail.com> Link: http://lkml.kernel.org/r/1342746282-28497-8-git-send-email-jmillenbach@gmail.comSigned-off-by: NGokul Caushik <caushik1@gmail.com> Reviewed-by: NJosh Triplett <josh@joshtriplett.org> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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由 Joe Millenbach 提交于
Removes early_serial_console.c code if we don't have the config option that enables it (EARLY_PRINTK). When disabling this code, make early_serial_base a constant 0 to allow the compiler to optimize away the code that checks for early_serial_base. Signed-off-by: NJoe Millenbach <jmillenbach@gmail.com> Link: http://lkml.kernel.org/r/1342746282-28497-7-git-send-email-jmillenbach@gmail.comSigned-off-by: NGokul Caushik <caushik1@gmail.com> Reviewed-by: NJosh Triplett <josh@joshtriplett.org> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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由 Joe Millenbach 提交于
Changed putstr flagging from parameter to conditional compilation for puts, debug_putstr, and error_putstr. This allows for space savings since most configurations won't use this feature. Signed-off-by: NJoe Millenbach <jmillenbach@gmail.com> Link: http://lkml.kernel.org/r/1342746282-28497-5-git-send-email-jmillenbach@gmail.comSigned-off-by: NGokul Caushik <caushik1@gmail.com> Reviewed-by: NJosh Triplett <josh@joshtriplett.org> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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由 Joe Millenbach 提交于
For consistency we changed the error output path to match the new debug path. Signed-off-by: NJoe Millenbach <jmillenbach@gmail.com> Link: http://lkml.kernel.org/r/1342746282-28497-4-git-send-email-jmillenbach@gmail.comSigned-off-by: NGokul Caushik <caushik1@gmail.com> Reviewed-by: NJosh Triplett <josh@joshtriplett.org> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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- 03 8月, 2010 2 次提交
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由 H. Peter Anvin 提交于
It is a subset of <ctype.h> functionality, so name it ctype.h. Also, reorganize header files so #include statements are clustered near the top as they should be. Signed-off-by: NH. Peter Anvin <hpa@zytor.com> LKML-Reference: <4C5752F2.8030206@kernel.org>
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由 Yinghai Lu 提交于
This enables the decompressor output to be seen on the serial console. Most of the code is shared with the regular boot code. We could add printf to the decompressor if needed, but currently there is no sufficiently compelling user. -v2: define BOOT_BOOT_H to avoid include boot.h -v3: early_serial_base need to be static in misc.c ? -v4: create seperate string.c printf.c cmdline.c early_serial_console.c after hpa's patch that allow global variables in compressed/misc stage -v5: remove printf.c related Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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