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function_graph: Fix args pointer mismatch in print_graph_retval() 

When funcgraph-args and funcgraph-retaddr are both enabled, many kernel
functions display invalid parameters in trace logs.

The issue occurs because print_graph_retval() passes a mismatched args
pointer to print_function_args(). Fix this by retrieving the correct
args pointer using the FGRAPH_ENTRY_ARGS() macro.

Link: https://patch.msgid.link/20260112021601.1300479-1-dolinux.peng@gmail.com
Fixes: f83ac7544f ("function_graph: Enable funcgraph-args and funcgraph-retaddr to work simultaneously")
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Donglin Peng <pengdonglin@xiaomi.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Donglin Peng 2026-01-12 10:16:01 +08:00 committed by Steven Rostedt (Google)
parent 00f13e28a9
commit c9703d17d2
1 changed files with 1 additions and 1 deletions
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2
kernel/trace/trace_functions_graph.c
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@ -901,7 +901,7 @@ static void print_graph_retval(struct trace_seq *s, struct ftrace_graph_ent_entr
trace_seq_printf(s, "%ps", func);
if (args_size >= FTRACE_REGS_MAX_ARGS * sizeof(long)) {
print_function_args(s, entry->args, (unsigned long)func);
print_function_args(s, FGRAPH_ENTRY_ARGS(entry), (unsigned long)func);
trace_seq_putc(s, ';');
} else
trace_seq_puts(s, "();");