Re: [PATCH -next] ftrace: Fix potential warning in trace_printk_seq during ftrace_dump
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2025-08-21 14:51:13
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On Thu, 21 Aug 2025 09:53:53 +0800 Tengda Wu [off-list ref] wrote:
There remains an edge case that concerns me: if size is 0, setting len to size - 1 would cause an underflow. Should we handle this edge case?
When the trace_seq is allocated, the size is set to 8K. If size is ever zero, then there would be no buffer. So no, we should not worry about that edge case because if it happened then we have a lot of other things to worry about. -- Steve