Hi Youwan,
On Wed, Jun 15, 2022 at 5:54 AM Youwan Wang <wangyouwan@xxxxxxxxxxxxx> wrote:
>
> PC1 -> PC2 in the process of transferring the file,
> PC2 terminate the reception.
> It is found that PC1 will receive the Rcvd
> Forbiden message.
> transfer_response func is called and go to failed:
> transfer_complete func is called and go to transfer_free
>
> Invalid read of size 8
> at 0x129C9B: put_get_data (gobex-transfer.c:138)
> by 0x128675: get_body (gobex-packet.c:397)
> by 0x128675: g_obex_packet_encode (gobex-packet.c:451)
> by 0x1264ED: write_data (gobex.c:461)
> by 0x1264ED: write_data (gobex.c:431)
> by 0x49B7E97: g_main_context_dispatch ()
> by 0x49B8287: ??? ()
> by 0x49B8581: g_main_loop_run ()
> by 0x120834: main (main.c:322)
> Address 0x7300028 is 56 bytes inside a block of size 64 free'd
> at 0x48369AB: free (vg_replace_malloc.c:530)
> by 0x12A404: transfer_response (gobex-transfer.c:245)
> by 0x126B02: handle_response (gobex.c:1128)
> by 0x127087: incoming_data (gobex.c:1373)
> by 0x49B7E97: g_main_context_dispatch ()
> by 0x49B8287: ??? ()
> by 0x49B8581: g_main_loop_run ()
> by 0x120834: main (main.c:322)
> Block was alloc'd at
> at 0x4837B65: calloc (vg_replace_malloc.c:752)
> by 0x49BD9D8: g_malloc0 ()
> by 0x129A49: transfer_new (gobex-transfer.c:258)
> by 0x12A612: g_obex_put_req_pkt (gobex-transfer.c:282)
> by 0x12A612: g_obex_put_req_pkt (gobex-transfer.c:271)
> by 0x145862: transfer_start_put (transfer.c:880)
> by 0x145862: obc_transfer_start (transfer.c:911)
> by 0x13B487: session_process_transfer (session.c:836)
> by 0x13C128: session_process_queue (session.c:887)
> by 0x13C128: session_process_queue (session.c:872)
> by 0x13C18F: session_process (session.c:820)
> by 0x49B7E97: g_main_context_dispatch (in /usr/lib/x86_64-linux-gnu/)
> by 0x49B8287: ??? (in /usr/lib/x86_64-linux-gnu/)
> by 0x49B8581: g_main_loop_run (in /usr/lib/x86_64-linux-gnu/)
> by 0x120834: main (main.c:322)
> ---
> gobex/gobex-transfer.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/gobex/gobex-transfer.c b/gobex/gobex-transfer.c
> index c94d018b2..8e97fc73e 100644
> --- a/gobex/gobex-transfer.c
> +++ b/gobex/gobex-transfer.c
> @@ -197,6 +197,14 @@ static void transfer_response(GObex *obex, GError *err, GObexPacket *rsp,
> }
>
> rspcode = g_obex_packet_get_operation(rsp, &final);
> + if (rspcode == G_OBEX_RSP_FORBIDDEN) {
> + err = g_error_new(G_OBEX_ERROR, rspcode, "%s",
> + g_obex_strerror(rspcode));
> + g_obex_debug(G_OBEX_DEBUG_ERROR, "%s", err->message);
> + g_error_free(err);
> + return;
> + }
This is not quite right, in fact the if statement below already treat
such errors, we might be missing something like final:
/* Reset if final so it can no longer be cancelled */
if (final_rsp)
obex->pending_req = NULL;
This would be a problem on the remote implementation which is
indicating that perhaps it is just a temporary failure, anyway then:
id = transfer->req_id;
transfer->req_id = 0;
This resets the req_id so on transfer_free the following code is not run:
if (transfer->req_id > 0)
g_obex_cancel_req(transfer->obex, transfer->req_id, TRUE);
So either we have to restore the transfer->req_id = id or not reset it
to 0, so perhaps something like this works better:
diff --git a/gobex/gobex-transfer.c b/gobex/gobex-transfer.c
index c94d018b2..8fae65d8d 100644
--- a/gobex/gobex-transfer.c
+++ b/gobex/gobex-transfer.c
@@ -200,6 +200,11 @@ static void transfer_response(GObex *obex, GError
*err, GObexPacket *rsp,
if (rspcode != G_OBEX_RSP_SUCCESS && rspcode != G_OBEX_RSP_CONTINUE) {
err = g_error_new(G_OBEX_ERROR, rspcode, "%s",
g_obex_strerror(rspcode));
+ /* If not marked as final response but transfer_complete gonna
+ * be called restore the req_id so it can be properly cancelled
+ */
+ if (!final)
+ transport->req_id = id;
goto failed;
}
> +
> if (rspcode != G_OBEX_RSP_SUCCESS && rspcode != G_OBEX_RSP_CONTINUE) {
> err = g_error_new(G_OBEX_ERROR, rspcode, "%s",
> g_obex_strerror(rspcode));
> --
> 2.20.1
>
>
>
--
Luiz Augusto von Dentz
