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tracing: do not leak kernel addresses

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CVE-2017-0630

This likely breaks tracing tools like trace-cmd.  It logs in the same
format but now addresses are all 0x0.

Bug: 34277115
Change-Id: Ifb0d4d2a184bf0d95726de05b1acee0287a375d9
Signed-off-by: Jian Qiu <qiujian@rock-chips.com>
This commit is contained in:
Nick Desaulniers
2017-03-03 15:40:12 -08:00
committed by Tao Huang
parent 5f09850f65
commit 56bb2ed623
1 changed files with 1 additions and 1 deletions
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2
kernel/trace/trace_printk.c
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@@ -304,7 +304,7 @@ static int t_show(struct seq_file *m, void *v)
if (!*fmt)
return 0;
seq_printf(m, "0x%lx : \"", *(unsigned long *)fmt);
seq_printf(m, "0x%lx : \"", 0L);
/*
* Tabs and new lines need to be converted.