MIPS: traps: Fix SIGFPE information leak from `do_ov' and `do_trap_or_bp'

[pandora-kernel.git] / arch / mips / kernel / traps.c

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 261ccbc..e0ee75d 100644 (file)
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -656,14 +656,14 @@ static int simulate_sync(struct pt_regs *regs, unsigned int opcode)
 
 asmlinkage void do_ov(struct pt_regs *regs)
 {
-       siginfo_t info;
+       siginfo_t info = {
+               .si_signo = SIGFPE,
+               .si_code = FPE_INTOVF,
+               .si_addr = (void __user *)regs->cp0_epc,
+       };
 
        die_if_kernel("Integer overflow", regs);
 
-       info.si_code = FPE_INTOVF;
-       info.si_signo = SIGFPE;
-       info.si_errno = 0;
-       info.si_addr = (void __user *) regs->cp0_epc;
        force_sig_info(SIGFPE, &info, current);
 }
 
@@ -758,7 +758,7 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
 static void do_trap_or_bp(struct pt_regs *regs, unsigned int code,
        const char *str)
 {
-       siginfo_t info;
+       siginfo_t info = { 0 };
        char b[40];
 
 #ifdef CONFIG_KGDB_LOW_LEVEL_TRAP
@@ -785,7 +785,6 @@ static void do_trap_or_bp(struct pt_regs *regs, unsigned int code,
                else
                        info.si_code = FPE_INTOVF;
                info.si_signo = SIGFPE;
-               info.si_errno = 0;
                info.si_addr = (void __user *) regs->cp0_epc;
                force_sig_info(SIGFPE, &info, current);
                break;
@@ -1596,7 +1595,8 @@ void __cpuinit per_cpu_trap_init(void)
        }
 #endif /* CONFIG_MIPS_MT_SMTC */
 
-       cpu_data[cpu].asid_cache = ASID_FIRST_VERSION;
+       if (!cpu_data[cpu].asid_cache)
+               cpu_data[cpu].asid_cache = ASID_FIRST_VERSION;
 
        atomic_inc(&init_mm.mm_count);
        current->active_mm = &init_mm;