Matthew Wilcox (Oracle) 430f24f94c XArray: Fix infinite loop with entry at ULONG_MAX ...

If there is an entry at ULONG_MAX, xa_for_each() will overflow the
'index + 1' in xa_find_after() and wrap around to 0.  Catch this case
and terminate the loop by returning NULL.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: stable@vger.kernel.org

2020-01-17 22:32:24 -05:00

53 KiB

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