From 3785006ac3c8941feb63097c416de92114a6bc39 Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Wed, 21 Mar 2012 16:33:45 -0700 Subject: [PATCH] xtensa: don't mask signals if we fail to setup signal stack setup_frame() needs to return an indication of whether it succeeded or failed in setting up the signal stack frame. If setup_frame() fails then we must not modify current->blocked. Acked-by: Oleg Nesterov Cc: Chris Zankel Signed-off-by: Matt Fleming Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/xtensa/kernel/signal.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c index 24655e3..17ceab8 100644 --- a/arch/xtensa/kernel/signal.c +++ b/arch/xtensa/kernel/signal.c @@ -336,8 +336,8 @@ gen_return_code(unsigned char *codemem) } -static void setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs *regs) +static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info, + sigset_t *set, struct pt_regs *regs) { struct rt_sigframe *frame; int err = 0; @@ -422,10 +422,11 @@ static void setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info, current->comm, current->pid, signal, frame, regs->pc); #endif - return; + return 0; give_sigsegv: force_sigsegv(sig, current); + return -EFAULT; } /* @@ -534,7 +535,9 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset) /* Whee! Actually deliver the signal. */ /* Set up the stack frame */ - setup_frame(signr, &ka, &info, oldset, regs); + ret = setup_frame(signr, &ka, &info, oldset, regs); + if (ret) + return ret; spin_lock_irq(¤t->sighand->siglock); sigorsets(¤t->blocked, ¤t->blocked, &ka.sa.sa_mask); -- 2.7.4