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fault-injection: set bounds on what /proc/self/make-it-fail accepts.

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/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>
This commit is contained in:
Dave Jones 2014-04-07 15:39:15 -07:00 committed by Linus Torvalds
parent b06dd879f5
commit 16caed3196
1 changed files with 3 additions and 0 deletions
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fs/proc/base.c
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@ -1236,6 +1236,9 @@ static ssize_t proc_fault_inject_write(struct file * file,
make_it_fail = simple_strtol(strstrip(buffer), &end, 0);
if (*end)
return -EINVAL;
if (make_it_fail < 0 || make_it_fail > 1)
return -EINVAL;
task = get_proc_task(file_inode(file));
if (!task)
return -ESRCH;