mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 11:19:37 +00:00
MIPS: traps: Fix SIGFPE information leak from do_ov' and
do_trap_or_bp'
Avoid sending a partially initialised `siginfo_t' structure along SIGFPE signals issued from `do_ov' and `do_trap_or_bp', leading to information leaking from the kernel stack. Signed-off-by: Maciej W. Rozycki <macro@imgtec.com> Cc: stable@vger.kernel.org Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
parent
887349f69f
commit
e723e3f7f9
1 changed files with 6 additions and 7 deletions
|
@ -690,15 +690,15 @@ static int simulate_sync(struct pt_regs *regs, unsigned int opcode)
|
|||
asmlinkage void do_ov(struct pt_regs *regs)
|
||||
{
|
||||
enum ctx_state prev_state;
|
||||
siginfo_t info;
|
||||
siginfo_t info = {
|
||||
.si_signo = SIGFPE,
|
||||
.si_code = FPE_INTOVF,
|
||||
.si_addr = (void __user *)regs->cp0_epc,
|
||||
};
|
||||
|
||||
prev_state = exception_enter();
|
||||
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);
|
||||
exception_exit(prev_state);
|
||||
}
|
||||
|
@ -874,7 +874,7 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
|
|||
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
|
||||
|
@ -903,7 +903,6 @@ 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;
|
||||
|
|
Loading…
Reference in a new issue