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Static: Fix bug in static route filter expressions
During reconfiguration, old and new filter expressions in static routes are compared using i_same() function. When filter expressions contain function calls, it is necessary that old filter expressions are the second argument in i_same(), as it is internally modified by i_same(). Otherwise pointers to old (and freed) data appear in the config structure. Thanks to Lennert Buytenhek for tracking and reporting the bug.
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@ -498,7 +498,8 @@ static_same_dest(struct static_route *x, struct static_route *y)
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static inline int
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static_same_rte(struct static_route *x, struct static_route *y)
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{
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return static_same_dest(x, y) && i_same(x->cmds, y->cmds);
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/* Note that i_same() requires arguments in (new, old) order */
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return static_same_dest(x, y) && i_same(y->cmds, x->cmds);
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}
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