Hi, Greg, The commit 11e4f3b ("mm: propagate error from stack expansion even for guard page") for 3.14-stable makes the testcase get "bus error", while it had "segmentation fault" in older kernels. ===== testcase ===== int main(void) { main(); return 0; } ==================== These 2 patches fix it by adding a VM_FAULT_SIGSEGV in all architecture fault handlers. [PATCH 1/2] is asjusted to ignore un-supported arch in 3.14. And some files are separated or renamed in newer kernel, so [PATCH 1/2] is also adjusted to add the VM_FAULT_SIGSEGV handling in the original files in 3.14. [PATCH 2/2] is cherry-picked from upstream. thanks, Sheng Linus Torvalds (1): vm: make stack guard page errors return VM_FAULT_SIGSEGV rather than SIGBUS Sheng Yong (1): vm: add VM_FAULT_SIGSEGV handling support arch/alpha/mm/fault.c | 2 ++ arch/arc/mm/fault.c | 2 ++ arch/avr32/mm/fault.c | 2 ++ arch/cris/mm/fault.c | 2 ++ arch/frv/mm/fault.c | 2 ++ arch/ia64/mm/fault.c | 2 ++ arch/m32r/mm/fault.c | 2 ++ arch/m68k/mm/fault.c | 2 ++ arch/metag/mm/fault.c | 2 ++ arch/microblaze/mm/fault.c | 2 ++ arch/mips/mm/fault.c | 2 ++ arch/mn10300/mm/fault.c | 2 ++ arch/openrisc/mm/fault.c | 2 ++ arch/parisc/mm/fault.c | 2 ++ arch/powerpc/mm/fault.c | 2 ++ arch/powerpc/platforms/cell/spu_fault.c | 2 +- arch/s390/mm/fault.c | 6 ++++++ arch/score/mm/fault.c | 2 ++ arch/sh/mm/fault.c | 2 ++ arch/sparc/mm/fault_32.c | 2 ++ arch/sparc/mm/fault_64.c | 2 ++ arch/tile/mm/fault.c | 2 ++ arch/um/kernel/trap.c | 2 ++ arch/x86/mm/fault.c | 2 ++ arch/xtensa/mm/fault.c | 2 ++ drivers/staging/lustre/lustre/llite/vvp_io.c | 2 +- include/linux/mm.h | 6 ++++-- mm/ksm.c | 2 +- mm/memory.c | 7 ++++--- 29 files changed, 63 insertions(+), 8 deletions(-) -- 1.8.3.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html