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Subject[PATCH] tracing: add checks for printing graph irq
Date
Check return value of trace_seq_printf.

Signed-off-by: Wenji Huang <wenji.huang@oracle.com>
---
kernel/trace/trace_functions_graph.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 45e6c01..3fa4055 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -555,8 +555,11 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
return TRACE_TYPE_PARTIAL_LINE;

/* Don't close the duration column if haven't one */
- if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION)
- trace_seq_printf(s, " |");
+ if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) {
+ ret = trace_seq_printf(s, " |");
+ if (!ret)
+ return TRACE_TYPE_PARTIAL_LINE;
+ }
ret = trace_seq_printf(s, "\n");

if (!ret)
--
1.5.6


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