diff options
| -rw-r--r-- | arch/x86/kernel/unwind_frame.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/kernel/unwind_frame.c b/arch/x86/kernel/unwind_frame.c index 9be9a8f8c5df..5639db619c03 100644 --- a/arch/x86/kernel/unwind_frame.c +++ b/arch/x86/kernel/unwind_frame.c @@ -20,7 +20,15 @@ unsigned long unwind_get_return_address(struct unwind_state *state) addr = ftrace_graph_ret_addr(state->task, &state->graph_idx, *addr_p, addr_p); - return __kernel_text_address(addr) ? addr : 0; + if (!__kernel_text_address(addr)) { + printk_deferred_once(KERN_WARNING + "WARNING: unrecognized kernel stack return address %p at %p in %s:%d\n", + (void *)addr, addr_p, state->task->comm, + state->task->pid); + return 0; + } + + return addr; } EXPORT_SYMBOL_GPL(unwind_get_return_address); |