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proc: don't report kernel addresses in /proc/<pid>/stack

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This just changes the file to report them as zero, although maybe even
that could be removed.  I checked, and at least procps doesn't actually
seem to parse the 'stack' file at all.

And since the file doesn't necessarily even exist (it requires
CONFIG_STACKTRACE), possibly other tools don't really use it either.

That said, in case somebody parses it with tools, just having that zero
there should keep such tools happy.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2017-11-27 16:45:56 -08:00
parent 1751e8a6cb
commit 8f5abe842e
1 changed files with 1 additions and 2 deletions
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3
fs/proc/base.c
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@ -443,8 +443,7 @@ static int proc_pid_stack(struct seq_file *m, struct pid_namespace *ns,
save_stack_trace_tsk(task, &trace);
for (i = 0; i < trace.nr_entries; i++) {
seq_printf(m, "[<%pK>] %pB\n",
(void *)entries[i], (void *)entries[i]);
seq_printf(m, "[<0>] %pB\n", (void *)entries[i]);
}
unlock_trace(task);
}