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riscv: panic if IRQ handler stacks cannot be allocated

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init_irq_stacks() and init_irq_scs() may fail when arch_alloc_vmap_stack
or scs_alloc return NULL, call panic() in this case.

Signed-off-by: Osama Abdelkader <osama.abdelkader@gmail.com>
Link: https://patch.msgid.link/20260404185522.21767-1-osama.abdelkader@gmail.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Osama Abdelkader 2026-04-04 20:55:20 +02:00 committed by Paul Walmsley
parent 1b2c6b56a9
commit 2abd0dba56
1 changed files with 14 additions and 8 deletions
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22
arch/riscv/kernel/irq.c
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@ -75,28 +75,34 @@ DECLARE_PER_CPU(ulong *, irq_shadow_call_stack_ptr);
DEFINE_PER_CPU(ulong *, irq_shadow_call_stack_ptr);
#endif
static void init_irq_scs(void)
static void __init init_irq_scs(void)
{
int cpu;
void *s;
if (!scs_is_enabled())
return;
for_each_possible_cpu(cpu)
per_cpu(irq_shadow_call_stack_ptr, cpu) =
scs_alloc(cpu_to_node(cpu));
for_each_possible_cpu(cpu) {
s = scs_alloc(cpu_to_node(cpu));
if (!s)
panic("Failed to allocate IRQ shadow call stack resources\n");
per_cpu(irq_shadow_call_stack_ptr, cpu) = s;
}
}
DEFINE_PER_CPU(ulong *, irq_stack_ptr);
#ifdef CONFIG_VMAP_STACK
static void init_irq_stacks(void)
static void __init init_irq_stacks(void)
{
int cpu;
ulong *p;
for_each_possible_cpu(cpu) {
p = arch_alloc_vmap_stack(IRQ_STACK_SIZE, cpu_to_node(cpu));
if (!p)
panic("Failed to allocate IRQ stack resources\n");
per_cpu(irq_stack_ptr, cpu) = p;
}
}
@ -104,7 +110,7 @@ static void init_irq_stacks(void)
/* irq stack only needs to be 16 byte aligned - not IRQ_STACK_SIZE aligned. */
DEFINE_PER_CPU_ALIGNED(ulong [IRQ_STACK_SIZE/sizeof(ulong)], irq_stack);
static void init_irq_stacks(void)
static void __init init_irq_stacks(void)
{
int cpu;
@ -129,8 +135,8 @@ void do_softirq_own_stack(void)
#endif /* CONFIG_SOFTIRQ_ON_OWN_STACK */
#else
static void init_irq_scs(void) {}
static void init_irq_stacks(void) {}
static void __init init_irq_scs(void) {}
static void __init init_irq_stacks(void) {}
#endif /* CONFIG_IRQ_STACKS */
int arch_show_interrupts(struct seq_file *p, int prec)