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Commit 19a58ce1 authored by Xinpeng Liu's avatar Xinpeng Liu Committed by Steven Rostedt (VMware)
Browse files

tracing/probe: Fix null pointer dereference 

BUG: KASAN: null-ptr-deref in trace_probe_cleanup+0x8d/0xd0
Read of size 8 at addr 0000000000000000 by task syz-executor.0/9746
trace_probe_cleanup+0x8d/0xd0
free_trace_kprobe.part.14+0x15/0x50
alloc_trace_kprobe+0x23e/0x250

Link: http://lkml.kernel.org/r/1565220563-980-1-git-send-email-danielliu861@gmail.com



Fixes: e3dc9f89 ("tracing/probe: Add trace_event_call accesses APIs")
Signed-off-by: default avatarXinpeng Liu <danielliu861@gmail.com>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent 595a438c

kernel/trace/trace_probe.c

+2 −1
Original line number Diff line number Diff line
@@ -895,6 +895,7 @@ void trace_probe_cleanup(struct trace_probe *tp) 
	for (i = 0; i < tp->nr_args; i++)

		traceprobe_free_probe_arg(&tp->args[i]);



	if (call->class)

		kfree(call->class->system);

	kfree(call->name);

	kfree(call->print_fmt);