amt: fix possible null-ptr-deref in amt_rcv()

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When amt interface receives amt message, it tries to obtain amt private
data from sock.
If there is no amt private data, it frees an skb immediately.
After kfree_skb(), it increases the rx_dropped stats.
But in order to use rx_dropped, amt private data is needed.
So, it makes amt_rcv() to do not increase rx_dropped stats when it can
not obtain amt private data.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 1a1a0e80e0 ("amt: fix possible memory leak in amt_rcv()")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Taehee Yoo 2022-06-02 14:01:07 +00:00 • committed by Jakub Kicinski

parent f55a07074f

commit d16207f92a

1 changed files with 2 additions and 1 deletions

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drivers/net/amt.c

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