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mptcp: pm: check add_addr_accept_max before accepting new ADD_ADDR 

commit 0137a3c7c2ea3f9df8ebfc65d78b4ba712a187bb upstream.

The limits might have changed in between, it is best to check them
before accepting new ADD_ADDR.

Fixes: d0876b2284 ("mptcp: add the incoming RM_ADDR support")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20240819-net-mptcp-pm-reusing-id-v1-10-38035d40de5b@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthieu Baerts (NGI0) 2024-08-19 21:45:28 +02:00 committed by Greg Kroah-Hartman
parent d20bf2c96d
commit 9907af6a28
1 changed files with 2 additions and 2 deletions
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4
net/mptcp/pm_netlink.c
View File

@ -856,8 +856,8 @@ static void mptcp_pm_nl_rm_addr_or_subflow(struct mptcp_sock *msk,
/* Note: if the subflow has been closed before, this
* add_addr_accepted counter will not be decremented.
*/
msk->pm.add_addr_accepted--;
WRITE_ONCE(msk->pm.accept_addr, true);
if (--msk->pm.add_addr_accepted < mptcp_pm_get_add_addr_accept_max(msk))
WRITE_ONCE(msk->pm.accept_addr, true);
}
}
}