diff options
Diffstat (limited to 'arch/s390/kernel/dumpstack.c')
| -rw-r--r-- | arch/s390/kernel/dumpstack.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/s390/kernel/dumpstack.c b/arch/s390/kernel/dumpstack.c index 34bdc60c0b11..d306fe04489a 100644 --- a/arch/s390/kernel/dumpstack.c +++ b/arch/s390/kernel/dumpstack.c @@ -38,6 +38,7 @@ const char *stack_type_name(enum stack_type type) return "unknown"; } } +EXPORT_SYMBOL_GPL(stack_type_name); static inline bool in_stack(unsigned long sp, struct stack_info *info, enum stack_type type, unsigned long low, @@ -93,7 +94,9 @@ int get_stack_info(unsigned long sp, struct task_struct *task, if (!sp) goto unknown; - task = task ? : current; + /* Sanity check: ABI requires SP to be aligned 8 bytes. */ + if (sp & 0x7) + goto unknown; /* Check per-task stack */ if (in_task_stack(sp, task, info)) @@ -128,8 +131,6 @@ void show_stack(struct task_struct *task, unsigned long *stack) struct unwind_state state; printk("Call Trace:\n"); - if (!task) - task = current; unwind_for_each_frame(&state, task, NULL, (unsigned long) stack) printk(state.reliable ? " [<%016lx>] %pSR \n" : "([<%016lx>] %pSR)\n", |