From: Xufeng Zhang <xufeng.zhang@xxxxxxxxxxxxx> Date: Thu, 12 Jun 2014 10:53:36 +0800 > Consider the scenario: > For a TCP-style socket, while processing the COOKIE_ECHO chunk in > sctp_sf_do_5_1D_ce(), after it has passed a series of sanity check, > a new association would be created in sctp_unpack_cookie(), but afterwards, > some processing maybe failed, and sctp_association_free() will be called to > free the previously allocated association, in sctp_association_free(), > sk_ack_backlog value is decremented for this socket, since the initial > value for sk_ack_backlog is 0, after the decrement, it will be 65535, > a wrap-around problem happens, and if we want to establish new associations > afterward in the same socket, ABORT would be triggered since sctp deem the > accept queue as full. > Fix this issue by only decrementing sk_ack_backlog for associations in > the endpoint's list. > > Fix-suggested-by: Neil Horman <nhorman@xxxxxxxxxxxxx> > Signed-off-by: Xufeng Zhang <xufeng.zhang@xxxxxxxxxxxxx> > --- > Change for v2: > Drop the redundant test for temp suggested by Vlad Yasevich. Applied and queued up for -stable, thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-sctp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
