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
Signed-off-by: Xinpeng Liu <danielliu...@gmail.com> --- kernel/trace/trace_probe.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index dbef0d1..fb6bfbc 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -895,7 +895,8 @@ void trace_probe_cleanup(struct trace_probe *tp) for (i = 0; i < tp->nr_args; i++) traceprobe_free_probe_arg(&tp->args[i]); - kfree(call->class->system); + if (call->class) + kfree(call->class->system); kfree(call->name); kfree(call->print_fmt); } -- 1.8.3.1