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rxrpc, afs: Fix selection of abort codes

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[ Upstream commit de696c4784f0706884458893c5a6c39b3a3ff65c ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
David Howells 2022-05-21 08:45:48 +01:00 committed by Greg Kroah-Hartman
parent 4a4e2e90ec
commit cb2ca93f8f
3 changed files with 8 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/afs/rxrpc.c
View File

@ -572,6 +572,8 @@ static void afs_deliver_to_call(struct afs_call *call)
case -ENODATA:
case -EBADMSG:
case -EMSGSIZE:
case -ENOMEM:
case -EFAULT:
abort_code = RXGEN_CC_UNMARSHAL;
if (state != AFS_CALL_CL_AWAIT_REPLY)
abort_code = RXGEN_SS_UNMARSHAL;
@ -579,7 +581,7 @@ static void afs_deliver_to_call(struct afs_call *call)
abort_code, ret, "KUM");
goto local_abort;
default:
abort_code = RX_USER_ABORT;
abort_code = RX_CALL_DEAD;
rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
abort_code, ret, "KER");
goto local_abort;
@ -871,7 +873,7 @@ void afs_send_empty_reply(struct afs_call *call)
case -ENOMEM:
_debug("oom");
rxrpc_kernel_abort_call(net->socket, call->rxcall,
RX_USER_ABORT, -ENOMEM, "KOO");
RXGEN_SS_MARSHAL, -ENOMEM, "KOO");
fallthrough;
default:
_leave(" [error]");
@ -913,7 +915,7 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
if (n == -ENOMEM) {
_debug("oom");
rxrpc_kernel_abort_call(net->socket, call->rxcall,
RX_USER_ABORT, -ENOMEM, "KOO");
RXGEN_SS_MARSHAL, -ENOMEM, "KOO");
}
_leave(" [error]");
}

4
net/rxrpc/call_event.c
View File

@ -377,9 +377,9 @@ void rxrpc_process_call(struct work_struct *work)
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;

2
net/rxrpc/conn_object.c
View File

@ -184,7 +184,7 @@ void __rxrpc_disconnect_call(struct rxrpc_connection *conn,
chan->last_type = RXRPC_PACKET_TYPE_ABORT;
break;
default:
chan->last_abort = RX_USER_ABORT;
chan->last_abort = RX_CALL_DEAD;
chan->last_type = RXRPC_PACKET_TYPE_ABORT;
break;
}