Commit 9cdae82d authored by Richard Kuo's avatar Richard Kuo
Browse files

Hexagon: check to if we will overflow the signal stack 



Signed-off-by: default avatarRichard Kuo <rkuo@codeaurora.org>
parent a11e67c2

arch/hexagon/kernel/signal.c

+4 −0
Original line number Diff line number Diff line
@@ -41,6 +41,10 @@ static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, 
{

	unsigned long sp = regs->r29;



	/* check if we would overflow the alt stack */

	if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size)))

		return (void __user __force *)-1UL;



	/* Switch to signal stack if appropriate */

	if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags(sp) == 0))

		sp = current->sas_ss_sp + current->sas_ss_size;