| Message ID | 156207932870.853.14700731055154895417.stgit@warthog.procyon.org.uk |
|---|---|
| State | Accepted |
| Delegated to: | David Miller |
| Headers | show |
| Series | [net-next] rxrpc: Fix uninitialized error code in rxrpc_send_data_packet() | expand |
From: David Howells <dhowells@redhat.com> Date: Tue, 02 Jul 2019 15:55:28 +0100 > With gcc 4.1: > > net/rxrpc/output.c: In function ‘rxrpc_send_data_packet’: > net/rxrpc/output.c:338: warning: ‘ret’ may be used uninitialized in this function > > Indeed, if the first jump to the send_fragmentable label is made, and > the address family is not handled in the switch() statement, ret will be > used uninitialized. > > Fix this by BUG()'ing as is done in other places in rxrpc where internal > support for future address families will need adding. It should not be > possible to reach this normally as the address families are checked > up-front. > > Fixes: 5a924b8951f835b5 ("rxrpc: Don't store the rxrpc header in the Tx queue sk_buffs") > Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> > Signed-off-by: David Howells <dhowells@redhat.com> Applied, thanks David.
diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c index a0b6abfbd277..948e3fe249ec 100644 --- a/net/rxrpc/output.c +++ b/net/rxrpc/output.c @@ -519,6 +519,9 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb, } break; #endif + + default: + BUG(); } if (ret < 0)
With gcc 4.1: net/rxrpc/output.c: In function ‘rxrpc_send_data_packet’: net/rxrpc/output.c:338: warning: ‘ret’ may be used uninitialized in this function Indeed, if the first jump to the send_fragmentable label is made, and the address family is not handled in the switch() statement, ret will be used uninitialized. Fix this by BUG()'ing as is done in other places in rxrpc where internal support for future address families will need adding. It should not be possible to reach this normally as the address families are checked up-front. Fixes: 5a924b8951f835b5 ("rxrpc: Don't store the rxrpc header in the Tx queue sk_buffs") Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: David Howells <dhowells@redhat.com> --- net/rxrpc/output.c | 3 +++ 1 file changed, 3 insertions(+)