seq_file: fix big-enough lseek() + read()
lseek() further than length of the file will leave stale ->index
(second-to-last during iteration). Next seq_read() will not notice
that ->f_pos is big enough to return 0, but will print last item
as if ->f_pos is pointing to it.
Introduced in commit cb510b8172
aka "seq_file: more atomicity in traverse()".
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -102,6 +102,7 @@ static int traverse(struct seq_file *m, loff_t offset)
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p = m->op->next(m, p, &index);
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}
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m->op->stop(m, p);
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m->index = index;
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return error;
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Eoverflow:
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