lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Mon, 25 Jul 2022 13:52:31 -0700 From: Mat Martineau <mathew.j.martineau@...ux.intel.com> To: netdev@...r.kernel.org Cc: Mat Martineau <mathew.j.martineau@...ux.intel.com>, davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com, edumazet@...gle.com, matthieu.baerts@...sares.net, fw@...len.de, mptcp@...ts.linux.dev Subject: [PATCH net] mptcp: Do not return EINPROGRESS when subflow creation succeeds New subflows are created within the kernel using O_NONBLOCK, so EINPROGRESS is the expected return value from kernel_connect(). __mptcp_subflow_connect() has the correct logic to consider EINPROGRESS to be a successful case, but it has also used that error code as its return value. Before v5.19 this was benign: all the callers ignored the return value. Starting in v5.19 there is a MPTCP_PM_CMD_SUBFLOW_CREATE generic netlink command that does use the return value, so the EINPROGRESS gets propagated to userspace. Make __mptcp_subflow_connect() always return 0 on success instead. Fixes: ec3edaa7ca6c ("mptcp: Add handling of outgoing MP_JOIN requests") Fixes: 702c2f646d42 ("mptcp: netlink: allow userspace-driven subflow establishment") Acked-by: Paolo Abeni <pabeni@...hat.com> Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com> --- Note: The original author of ec3edaa7ca6c is no longer reachable at that email address. --- net/mptcp/subflow.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 63e8892ec807..af28f3b60389 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -1533,7 +1533,7 @@ int __mptcp_subflow_connect(struct sock *sk, const struct mptcp_addr_info *loc, mptcp_sock_graft(ssk, sk->sk_socket); iput(SOCK_INODE(sf)); WRITE_ONCE(msk->allow_infinite_fallback, false); - return err; + return 0; failed_unlink: list_del(&subflow->node); base-commit: 9af0620de1e118666881376f6497d1785758b04c -- 2.37.1
Powered by blists - more mailing lists