Re: [PATCH net] ipv4: provide stronger user input validation in nl_fib_input()

2017-03-22 Thread David Miller
From: Eric Dumazet Date: Tue, 21 Mar 2017 19:22:28 -0700 > From: Eric Dumazet > > Alexander reported a KMSAN splat caused by reads of uninitialized > field (tb_id_in) from user provided struct fib_result_nl > > It turns out nl_fib_input() sanity

[PATCH net] ipv4: provide stronger user input validation in nl_fib_input()

2017-03-21 Thread Eric Dumazet
From: Eric Dumazet Alexander reported a KMSAN splat caused by reads of uninitialized field (tb_id_in) from user provided struct fib_result_nl It turns out nl_fib_input() sanity tests on user input is a bit wrong : User can pretend nlh->nlmsg_len is big enough, but provide