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由 Dave Watson 提交于
If icsk_ulp_ops is unset, it dereferences a null ptr. Add a null ptr check. BUG: KASAN: null-ptr-deref in copy_to_user include/linux/uaccess.h:168 [inline] BUG: KASAN: null-ptr-deref in do_tcp_getsockopt.isra.33+0x24f/0x1e30 net/ipv4/tcp.c:3057 Read of size 4 at addr 0000000000000020 by task syz-executor1/15452 Signed-off-by: NDave Watson <davejwatson@fb.com> Reported-by: N"Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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