Patch "riscv: stacktrace: Fixup ftrace_graph_ret_addr retp argument" has been added to the 4.19-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    riscv: stacktrace: Fixup ftrace_graph_ret_addr retp argument

to the 4.19-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     riscv-stacktrace-fixup-ftrace_graph_ret_addr-retp-ar.patch
and it can be found in the queue-4.19 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 72dea6c020220e8f4916d698293730b8f3dc8b27
Author: Guo Ren <guoren@xxxxxxxxxx>
Date:   Wed Nov 9 01:49:36 2022 -0500

    riscv: stacktrace: Fixup ftrace_graph_ret_addr retp argument
    
    [ Upstream commit 5c3022e4a616d800cf5f4c3a981d7992179e44a1 ]
    
    The 'retp' is a pointer to the return address on the stack, so we
    must pass the current return address pointer as the 'retp'
    argument to ftrace_push_return_trace(). Not parent function's
    return address on the stack.
    
    Fixes: b785ec129bd9 ("riscv/ftrace: Add HAVE_FUNCTION_GRAPH_RET_ADDR_PTR support")
    Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
    Signed-off-by: Guo Ren <guoren@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20221109064937.3643993-2-guoren@xxxxxxxxxx
    Cc: stable@xxxxxxxxxxxxxxx
    Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/arch/riscv/kernel/stacktrace.c b/arch/riscv/kernel/stacktrace.c
index 3d1e184e39e9..75ed5b5b1f9b 100644
--- a/arch/riscv/kernel/stacktrace.c
+++ b/arch/riscv/kernel/stacktrace.c
@@ -69,7 +69,7 @@ static void notrace walk_stackframe(struct task_struct *task,
 		} else {
 			fp = frame->fp;
 			pc = ftrace_graph_ret_addr(current, NULL, frame->ra,
-						   (unsigned long *)(fp - 8));
+						   &frame->ra);
 		}
 
 	}