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Fix NULL pointer dereference in cn_filter()

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Check that sk_user_data is not NULL, else return from cn_filter().
Could not reproduce this issue, but Oliver Sang verified it has fixed
the "Closes" problem below.

Fixes: 2aa1f7a1f4 ("connector/cn_proc: Add filtering to fix some bugs")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202309201456.84c19e27-oliver.sang@intel.com/
Signed-off-by: Anjali Kulkarni <anjali.k.kulkarni@oracle.com>
Link: https://lore.kernel.org/r/20231020234058.2232347-1-anjali.k.kulkarni@oracle.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Anjali Kulkarni 2023-10-20 16:40:58 -07:00 committed by Paolo Abeni
parent d788c93383
commit 9644bc4970
1 changed files with 1 additions and 1 deletions
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2
drivers/connector/cn_proc.c
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@ -54,7 +54,7 @@ static int cn_filter(struct sock *dsk, struct sk_buff *skb, void *data)
enum proc_cn_mcast_op mc_op;
uintptr_t val;
if (!dsk || !data)
if (!dsk || !dsk->sk_user_data || !data)
return 0;
ptr = (__u32 *)data;