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perf util: Fix bad memory access in trace info.
In the write to the output_fd in the error condition of record_saved_cmdline(), we are writing 8 bytes from a memory location on the stack that contains a primitive that is only 4 bytes in size. Change the primitive to 8 bytes in size to match the size of the write in order to avoid reading unknown memory from the stack. Signed-off-by: Chris Phlipot <cphlipot0@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180829061954.18871-1-cphlipot0@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -377,7 +377,7 @@ static int record_ftrace_printk(void)
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static int record_saved_cmdline(void)
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{
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unsigned int size;
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unsigned long long size;
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char *path;
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struct stat st;
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int ret, err = 0;
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