Hello Wei Wang,
This is a semi-automatic email about new static checker warnings.
The patch 66f5d6ce53e6: "ipv6: replace rwlock with rcu and spinlock
in fib6_table" from Oct 6, 2017, leads to the following Smatch
complaint:
net/ipv6/ip6_fib.c:1462 fib6_locate()
warn: variable dereferenced before check 'fn' (see line 1459)
net/ipv6/ip6_fib.c
1458 if (src_len) {
1459 struct fib6_node *subtree = FIB6_SUBTREE(fn);
^^^^^^^^^^^^^^^^
We shifted this dereference
1460
1461 WARN_ON(saddr == NULL);
1462 if (fn && subtree)
^^
before the check for NULL.
1463 fn = fib6_locate_1(subtree, saddr, src_len,
1464 offsetof(struct rt6_info, rt6i_src),
regards,
dan carpenter
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