CVE-2025-38190
atm: Revert atm_account_tx() if copy_from_iter_full() fails.
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atm: Revert atm_account_tx() if copy_from_iter_full() fails.
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 by atm_account_tx(). It is expected to be reverted by atm_pop_raw() later called by vcc->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 in the failure path. Note that the corresponding sk_wmem_alloc operation can be found in alloc_tx() as of the blamed commit. $ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~
Reserved 2025-04-16 | Published 2025-07-04 | Updated 2025-07-04 | Assigner Linuxgit.kernel.org/...c/5e0d00992118e234ebf29d5145c1cc920342777e
git.kernel.org/...c/c12430edd92fd49a4800b0f3fb395b50cb16bcc1
git.kernel.org/...c/287b4f085d2ca3375cf1ee672af27410c64777e8
git.kernel.org/...c/2252c539c43f9a1431a7e8b34e3c18e9dd77a96d
git.kernel.org/...c/3902205eadf35db59dbc2186c2a98b9e6182efa5
git.kernel.org/...c/3d828519bd69bfcaabdd942a872679617ef06739
git.kernel.org/...c/7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685
git.kernel.org/...c/7851263998d4269125fd6cb3fdbfc7c6db853859
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