Thread (2 messages) 2 messages, 2 authors, 2021-07-18

Re: [PATCH net] sctp: trim optlen when it's a huge value in sctp_setsockopt

From: patchwork-bot+netdevbpf@kernel.org
Date: 2021-07-18 16:50:30
Also in: linux-sctp

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Sat, 17 Jul 2021 17:19:19 -0400 you wrote:
After commit ca84bd058dae ("sctp: copy the optval from user space in
sctp_setsockopt"), it does memory allocation in sctp_setsockopt with
the optlen, and it would fail the allocation and return error if the
optlen from user space is a huge value.

This breaks some sockopts, like SCTP_HMAC_IDENT, SCTP_RESET_STREAMS and
SCTP_AUTH_KEY, as when processing these sockopts before, optlen would
be trimmed to a biggest value it needs when optlen is a huge value,
instead of failing the allocation and returning error.

[...]
Here is the summary with links:
  - [net] sctp: trim optlen when it's a huge value in sctp_setsockopt
    https://git.kernel.org/netdev/net/c/2f3fdd8d4805

You are awesome, thank you!
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