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| author |   Vasily Gorbik <gor@linux.ibm.com> | 2017-11-17 16:52:22 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-10-09 11:21:21 +0200 |
| commit | 7fef92ccadd744492526d7749eebfe24dd8dcc48 (patch) | |
| tree | 1222e34e9258e2312d294020cff6ba2f749f228f | |
| parent | s390/kasan: add initialization code and enable it (diff) | |
| download | linux-dev-7fef92ccadd744492526d7749eebfe24dd8dcc48.tar.xz linux-dev-7fef92ccadd744492526d7749eebfe24dd8dcc48.zip | |
s390/kasan: double the stack size
Kasan stack instrumentation pads stack variables with redzones, which
increases stack frames size significantly. Stack sizes are increased
from 16k to 32k in the code, as well as for the kernel stack overflow
detection option (CHECK_STACK).
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/Makefile | 2 | ||||
| -rw-r--r-- | arch/s390/include/asm/thread_info.h | 4 |
2 files changed, 5 insertions, 1 deletions
diff --git a/arch/s390/Makefile b/arch/s390/Makefile index ee65185bbc80..0b33577932c3 100644 --- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -27,7 +27,7 @@ KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-option,-ffreestanding) KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) UTS_MACHINE := s390x -STACK_SIZE := 16384 +STACK_SIZE := $(if $(CONFIG_KASAN),32768,16384) CHECKFLAGS += -D__s390__ -D__s390x__ export LD_BFD diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h index 1bbbaf6ae511..79b40600f523 100644 --- a/arch/s390/include/asm/thread_info.h +++ b/arch/s390/include/asm/thread_info.h @@ -13,7 +13,11 @@ /* * General size of kernel stacks */ +#ifdef CONFIG_KASAN +#define THREAD_SIZE_ORDER 3 +#else #define THREAD_SIZE_ORDER 2 +#endif #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) #ifndef __ASSEMBLY__ |