49b538e79b
-----BEGIN PGP SIGNATURE-----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=q6E6
-----END PGP SIGNATURE-----
Merge tag 'rxrpc-fixes-20181008' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
David Howells says:
====================
rxrpc: Fix packet reception code
Here are a set of patches that prepares for and fix problems in rxrpc's
package reception code. There serious problems are:
(A) There's a window between binding the socket and setting the data_ready
hook in which packets can find their way into the UDP socket's receive
queues.
(B) The skb_recv_udp() will return an error (and clear the error state) if
there was an error on the Tx side. rxrpc doesn't handle this.
(C) The rxrpc data_ready handler doesn't fully drain the UDP receive
queue.
(D) The rxrpc data_ready handler assumes it is called in a non-reentrant
state.
The second patch fixes (A) - (C); the third patch renders (B) and (C)
non-issues by using the recap_rcv hook instead of data_ready - and the
final patch fixes (D). That last is the most complex.
The preparatory patches are:
(1) Fix some places that are doing things in the wrong net namespace.
(2) Stop taking the rcu read lock as it's held by the IP input routine in
the call chain.
(3) Only end the Tx phase if *we* rotated the final packet out of the Tx
buffer.
(4) Don't assume that the call state won't change after dropping the
call_state lock.
(5) Only take receive window and MTU suze parameters from an ACK packet if
it's the latest ACK packet.
(6) Record connection-level abort information correctly.
(7) Fix a trace line.
And then there are three main patches - note that these are mixed in with
the preparatory patches somewhat:
(1) Fix the setup window (A), skb_recv_udp() error check (B) and packet
drainage (C).
(2) Switch to using the encap_rcv instead of data_ready to cut out the
effects of the UDP read queues and get the packets delivered directly.
(3) Add more locking into the various packet input paths to defend against
re-entrance (D).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
|
||
|---|---|---|
| .. | ||
| asm-generic | ||
| drm | ||
| linux | ||
| misc | ||
| mtd | ||
| rdma | ||
| scsi | ||
| sound | ||
| video | ||
| xen | ||