From: Srivatsa Vaddagiri <vatsa@in.ibm.com> During some signal test, we found that v_regs pointer was not setup correctly. v_regs was made to point to itself, as a result of which the pointer was corrupted when vec registers were copied over. When the signal handler returned, restore_sigcontext tried derefering the invalid pointer and in the process killed the app with SIGSEGV. Signed-off-by: Srivatsa Vaddagiri <vatsa@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> --- 25-akpm/arch/ppc64/kernel/signal.c | 2 +- 1 files changed, 1 insertion(+), 1 deletion(-) diff -puN arch/ppc64/kernel/signal.c~ppc64-fix-v_regs-pointer-setup arch/ppc64/kernel/signal.c --- 25/arch/ppc64/kernel/signal.c~ppc64-fix-v_regs-pointer-setup Wed Aug 18 17:30:08 2004 +++ 25-akpm/arch/ppc64/kernel/signal.c Wed Aug 18 17:30:08 2004 @@ -127,7 +127,7 @@ static long setup_sigcontext(struct sigc * v_regs pointer or not */ #ifdef CONFIG_ALTIVEC - elf_vrreg_t __user *v_regs = (elf_vrreg_t __user *)(((unsigned long)sc->vmx_reserve) & ~0xful); + elf_vrreg_t __user *v_regs = (elf_vrreg_t __user *)(((unsigned long)sc->vmx_reserve + 15) & ~0xful); #endif long err = 0; _