diff options
| -rw-r--r-- | arch/x86/kernel/unwind_guess.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/kernel/unwind_guess.c b/arch/x86/kernel/unwind_guess.c index 2d721e533cf4..b80e8bf43cc6 100644 --- a/arch/x86/kernel/unwind_guess.c +++ b/arch/x86/kernel/unwind_guess.c @@ -7,11 +7,13 @@ unsigned long unwind_get_return_address(struct unwind_state *state) { + unsigned long addr = READ_ONCE_NOCHECK(*state->sp); + if (unwind_done(state)) return 0; return ftrace_graph_ret_addr(state->task, &state->graph_idx, - *state->sp, state->sp); + addr, state->sp); } EXPORT_SYMBOL_GPL(unwind_get_return_address); @@ -23,8 +25,10 @@ bool unwind_next_frame(struct unwind_state *state) return false; do { + unsigned long addr = READ_ONCE_NOCHECK(*state->sp); + for (state->sp++; state->sp < info->end; state->sp++) - if (__kernel_text_address(*state->sp)) + if (__kernel_text_address(addr)) return true; state->sp = info->next_sp; |