[v2] tracing: Fix synth event printk format for str fields

[PATCH v2] tracing: Fix synth event printk format for str fields

Douglas RAILLARD posted 1 patch 8 months, 3 weeks ago

Diff against v1
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kernel/trace/trace_events_synth.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

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[PATCH v2] tracing: Fix synth event printk format for str fields

Posted by Douglas RAILLARD 8 months, 3 weeks ago

From: Douglas Raillard <douglas.raillard@arm.com>

The printk format for synth event uses "%.*s" to print string fields,
but then only passes the pointer part as var arg.

Replace %.*s with %s as the C string is guaranteed to be null-terminated.

Signed-off-by: Douglas Raillard <douglas.raillard@arm.com>
---
 kernel/trace/trace_events_synth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_events_synth.c b/kernel/trace/trace_events_synth.c
index e3f7d09e5512..f71e49cd35b0 100644
--- a/kernel/trace/trace_events_synth.c
+++ b/kernel/trace/trace_events_synth.c
@@ -305,7 +305,7 @@ static const char *synth_field_fmt(char *type)
 	else if (strcmp(type, "gfp_t") == 0)
 		fmt = "%x";
 	else if (synth_field_is_string(type))
-		fmt = "%.*s";
+		fmt = "%s";
 	else if (synth_field_is_stack(type))
 		fmt = "%s";
 
-- 
2.43.0