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rxrpc, afs: Fix selection of abort codes

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The RX_USER_ABORT code should really only be used to indicate that the user
of the rxrpc service (ie. userspace) implicitly caused a call to be aborted
- for instance if the AF_RXRPC socket is closed whilst the call was in
progress.  (The user may also explicitly abort a call and specify the abort
code to use).

Change some of the points of generation to use other abort codes instead:

 (1) Abort the call with RXGEN_SS_UNMARSHAL or RXGEN_CC_UNMARSHAL if we see
     ENOMEM and EFAULT during received data delivery and abort with
     RX_CALL_DEAD in the default case.

 (2) Abort with RXGEN_SS_MARSHAL if we get ENOMEM whilst trying to send a
     reply.

 (3) Abort with RX_CALL_DEAD if we stop hearing from the peer if we had
     heard from the peer and abort with RX_CALL_TIMEOUT if we hadn't.

 (4) Abort with RX_CALL_DEAD if we try to disconnect a call that's not
     completed successfully or been aborted.

Reported-by: Jeffrey Altman <jaltman@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Howells
2022-05-21 08:45:48 +01:00
committed by David S. Miller
parent 4ba68c5192
commit de696c4784
3 changed files with 8 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
net/rxrpc/call_event.c
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@@ -377,9 +377,9 @@ recheck_state:
if (test_bit(RXRPC_CALL_RX_HEARD, &call->flags) &&
(int)call->conn->hi_serial - (int)call->rx_serial > 0) {
trace_rxrpc_call_reset(call);
rxrpc_abort_call("EXP", call, 0, RX_USER_ABORT, -ECONNRESET);
rxrpc_abort_call("EXP", call, 0, RX_CALL_DEAD, -ECONNRESET);
} else {
rxrpc_abort_call("EXP", call, 0, RX_USER_ABORT, -ETIME);
rxrpc_abort_call("EXP", call, 0, RX_CALL_TIMEOUT, -ETIME);
}
set_bit(RXRPC_CALL_EV_ABORT, &call->events);
goto recheck_state;