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llc: fix NULL pointer deref for SOCK_ZAPPED
authorCong Wang <xiyou.wangcong@gmail.com>
Fri, 20 Apr 2018 04:54:34 +0000 (21:54 -0700)
committerDavid S. Miller <davem@davemloft.net>
Sun, 22 Apr 2018 18:56:22 +0000 (14:56 -0400)
commit3a04ce7130a7e5dad4e78d45d50313747f8c830f
tree52d1a44181da326f2fc5805efbd5875d159bc7b3tree
parent5e391dc5a8d801a2410d0032ad4a428d1d61800ccommit | diff
llc: fix NULL pointer deref for SOCK_ZAPPED

For SOCK_ZAPPED socket, we don't need to care about llc->sap,
so we should just skip these refcount functions in this case.

Fixes: f7e43672683b ("llc: hold llc_sap before release_sock()")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/llc/af_llc.c diff | blob | history
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