MINSIGSTKSZ and SIGSTKSZ for ARM64 are not correctly set in latest kernel. This patch fixes this issue. This issue is reported in LTP (testcase: sigaltstack02.c). Testcase failed when sigaltstack() called with stack size "MINSIGSTKSZ - 1" Since in Glibc-2.22, MINSIGSTKSZ is set to 5120 but in kernel it is set to 2048 so testcase gets failed. Testcase Output: sigaltstack02 1 TPASS : stgaltstack() fails, Invalid Flag value,errno:22 sigaltstack02 2 TFAIL : sigaltstack() returned 0, expected -1,errno:12 Reported Issue in Glibc Bugzilla: https://sourceware.org/bugzilla/show_bug.cgi?id=16850 Bugfix in Glibc-2.22: https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=blob;f=sysdeps/unix/ sysv/linux/aarch64/bits/sigstack.h;h=8f2fb76e3e81734ef8a9cf9ae40daf4705 f31c35;hb=b763f6ae859ecea70a5dacb8ad45c71d5f667e2e Signed-off-by: Akhilesh Kumar <akhilesh.k@xxxxxxxxxxx> Signed-off-by: Manjeet Pawar <manjeet.p@xxxxxxxxxxx> Signed-off-by: Rohit Thapliyal <r.thapliyal@xxxxxxxxxxx> --- include/uapi/asm-generic/signal.h | 9 +++++++-- 1 files changed, 7 insertions(+), 2 deletions(-) diff --git a/include/uapi/asm-generic/signal.h b/include/uapi/asm-generic/signal.h index 9df61f1..2ffbe38 100644 --- a/include/uapi/asm-generic/signal.h +++ b/include/uapi/asm-generic/signal.h @@ -80,8 +80,13 @@ * SA_RESTORER 0x04000000 */ -#define MINSIGSTKSZ 2048 -#define SIGSTKSZ 8192 +#ifdef CONFIG_ARM64 +#define MINSIGSTKSZ 5120 +#define SIGSTKSZ 16384 +#else +#define MINSIGSTKSZ 2048 +#define SIGSTKSZ 8192 +#endif #ifndef __ASSEMBLY__ typedef struct { -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
