fault-injection: set bounds on what /proc/self/make-it-fail accepts.
/proc/self/make-it-fail is a boolean, but accepts any number, including negative ones. Change variable to unsigned, and cap upper bound at 1. [akpm@linux-foundation.org: don't make make_it_fail unsigned] Signed-off-by: Dave Jones <davej@fedoraproject.org> Reviewed-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -1236,6 +1236,9 @@ static ssize_t proc_fault_inject_write(struct file * file,
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make_it_fail = simple_strtol(strstrip(buffer), &end, 0);
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if (*end)
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return -EINVAL;
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if (make_it_fail < 0 || make_it_fail > 1)
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return -EINVAL;
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task = get_proc_task(file_inode(file));
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if (!task)
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return -ESRCH;
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