Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:atm: Revert atm_account_tx() if copy_from_iter_full() fails.In vcc_sendmsg(), we account skb->truesize to sk->sk_wmem_alloc byatm_account_tx().It is expected to be reverted by atm_pop_raw() later called byvcc->dev->ops->send(vcc, skb).However, vcc_sendmsg() misses the same revert when copy_from_iter_full()fails, and then we will leak a socket.Let's factorise the revert part as atm_return_tx() and call it inthe failure path.Note that the corresponding sk_wmem_alloc operation can be found inalloc_tx() as of the blamed commit. $ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~
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- https://github.com/w4zu/Debian_security