diff options
| -rw-r--r-- | arch/x86/kernel/unwind_frame.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kernel/unwind_frame.c b/arch/x86/kernel/unwind_frame.c index ea7b7f9a3b9e..33aeaae961aa 100644 --- a/arch/x86/kernel/unwind_frame.c +++ b/arch/x86/kernel/unwind_frame.c @@ -46,7 +46,14 @@ static bool is_last_task_frame(struct unwind_state *state) unsigned long bp = (unsigned long)state->bp; unsigned long regs = (unsigned long)task_pt_regs(state->task); - return bp == regs - FRAME_HEADER_SIZE; + /* + * We have to check for the last task frame at two different locations + * because gcc can occasionally decide to realign the stack pointer and + * change the offset of the stack frame by a word in the prologue of a + * function called by head/entry code. + */ + return bp == regs - FRAME_HEADER_SIZE || + bp == regs - FRAME_HEADER_SIZE - sizeof(long); } /* |