Merge tag 'v5.16-rc5' into locking/core, to pick up fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index e9ee8b526319..04143a653a8a 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -964,6 +964,9 @@ unsigned long __get_wchan(struct task_struct *p)
 	struct unwind_state state;
 	unsigned long addr = 0;
 
+	if (!try_get_task_stack(p))
+		return 0;
+
 	for (unwind_start(&state, p, NULL, NULL); !unwind_done(&state);
 	     unwind_next_frame(&state)) {
 		addr = unwind_get_return_address(&state);
@@ -974,6 +977,8 @@ unsigned long __get_wchan(struct task_struct *p)
 		break;
 	}
 
+	put_task_stack(p);
+
 	return addr;
 }