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SubjectRe: [PATCH] sctp: Fix error handling for switch statement case in the function sctp_cmd_interprete
On Tue, Apr 05, 2016 at 05:36:41PM -0400, Bastien Philbert wrote:
> This fixes error handling for the switch statement case
> SCTP_CMD_SEND_PKT by making the error value of the call
> to sctp_packet_transmit equal the variable error due to
> this function being able to fail with a error code. In
> addition allow the call to sctp_ootb_pkt_free afterwards
> to free up the no longer in use sctp packet even if the
> call to the function sctp_packet_transmit fails in order
> to avoid a memory leak here for not freeing the sctp

This leak shouldn't exist as sctp_packet_transmit() will free the packet
if it returns ENOMEM, through the nomem: handling.

But about making it visible to the user, that looks interesting to me
although I cannot foresee yet its effects, like the comment at the end
of sctp_packet_transmit() on not returning EHOSTUNREACH. Did you check
it?

>
> Signed-off-by: Bastien Philbert <bastienphilbert@gmail.com>
> ---
> net/sctp/sm_sideeffect.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
> index 7fe56d0..f3a8b58 100644
> --- a/net/sctp/sm_sideeffect.c
> +++ b/net/sctp/sm_sideeffect.c
> @@ -1434,7 +1434,7 @@ static int sctp_cmd_interpreter(sctp_event_t event_type,
> case SCTP_CMD_SEND_PKT:
> /* Send a full packet to our peer. */
> packet = cmd->obj.packet;
> - sctp_packet_transmit(packet, gfp);
> + error = sctp_packet_transmit(packet, gfp);
> sctp_ootb_pkt_free(packet);
> break;
>
> --
> 2.5.0
>
> --
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