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Re: [Qemu-devel] [PATCH 13/13] nbd: avoid uninitialized warnings
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH 13/13] nbd: avoid uninitialized warnings |
Date: |
Fri, 29 Nov 2013 16:27:44 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130923 Thunderbird/17.0.9 |
Il 29/11/2013 15:58, Marc-André Lureau ha scritto:
> ==15815== Thread 1:
> ==15815== Syscall param socketcall.sendto(msg) points to uninitialised byte(s)
> ==15815== at 0x65AD5CB: send (send.c:31)
> ==15815== by 0x37F84B: nbd_wr_sync (nbd.c:145)
> ==15815== by 0x37F94B: write_sync (nbd.c:186)
> ==15815== by 0x380FA9: nbd_send_request (nbd.c:681)
> ==15815== by 0x1C4A2D: nbd_teardown_connection (nbd-client.c:337)
> ==15815== by 0x1C4AD8: nbd_client_session_close (nbd-client.c:354)
> ==15815== by 0x1ED2D8: close_socketpair (spicebd.c:132)
> ==15815== by 0x1EE265: spice_close (spicebd.c:457)
> ==15815== by 0x1ACBF6: bdrv_close (block.c:1519)
> ==15815== by 0x1AD804: bdrv_delete (block.c:1772)
> ==15815== by 0x1B4136: bdrv_unref (block.c:4476)
> ==15815== by 0x1ACCE0: bdrv_close (block.c:1541)
> ==15815== Address 0x7feffef98 is on thread 1's stack
>
> Signed-off-by: Marc-André Lureau <address@hidden>
> ---
> block/nbd-client.c | 21 +++++++++------------
> 1 file changed, 9 insertions(+), 12 deletions(-)
>
> diff --git a/block/nbd-client.c b/block/nbd-client.c
> index ad6fb01..82806f1 100644
> --- a/block/nbd-client.c
> +++ b/block/nbd-client.c
> @@ -186,11 +186,10 @@ static int nbd_co_readv_1(NbdClientSession *client,
> int64_t sector_num,
> int nb_sectors, QEMUIOVector *qiov,
> int offset)
> {
> - struct nbd_request request;
> + struct nbd_request request = { .type = NBD_CMD_READ };
> struct nbd_reply reply;
> ssize_t ret;
>
> - request.type = NBD_CMD_READ;
> request.from = sector_num * 512;
> request.len = nb_sectors * 512;
>
> @@ -210,11 +209,10 @@ static int nbd_co_writev_1(NbdClientSession *client,
> int64_t sector_num,
> int nb_sectors, QEMUIOVector *qiov,
> int offset)
> {
> - struct nbd_request request;
> + struct nbd_request request = { .type = NBD_CMD_WRITE };
> struct nbd_reply reply;
> ssize_t ret;
>
> - request.type = NBD_CMD_WRITE;
> if (!bdrv_enable_write_cache(client->bs) &&
> (client->nbdflags & NBD_FLAG_SEND_FUA)) {
> request.type |= NBD_CMD_FLAG_FUA;
> @@ -276,7 +274,7 @@ int nbd_client_session_co_writev(NbdClientSession
> *client, int64_t sector_num,
>
> int nbd_client_session_co_flush(NbdClientSession *client)
> {
> - struct nbd_request request;
> + struct nbd_request request = { .type = NBD_CMD_FLUSH };
> struct nbd_reply reply;
> ssize_t ret;
>
> @@ -284,7 +282,6 @@ int nbd_client_session_co_flush(NbdClientSession *client)
> return 0;
> }
>
> - request.type = NBD_CMD_FLUSH;
> if (client->nbdflags & NBD_FLAG_SEND_FUA) {
> request.type |= NBD_CMD_FLAG_FUA;
> }
> @@ -306,14 +303,13 @@ int nbd_client_session_co_flush(NbdClientSession
> *client)
> int nbd_client_session_co_discard(NbdClientSession *client, int64_t
> sector_num,
> int nb_sectors)
> {
> - struct nbd_request request;
> + struct nbd_request request = { .type = NBD_CMD_TRIM };
> struct nbd_reply reply;
> ssize_t ret;
>
> if (!(client->nbdflags & NBD_FLAG_SEND_TRIM)) {
> return 0;
> }
> - request.type = NBD_CMD_TRIM;
> request.from = sector_num * 512;
> request.len = nb_sectors * 512;
>
> @@ -331,11 +327,12 @@ int nbd_client_session_co_discard(NbdClientSession
> *client, int64_t sector_num,
>
> static void nbd_teardown_connection(NbdClientSession *client)
> {
> - struct nbd_request request;
> + struct nbd_request request = {
> + .type = NBD_CMD_DISC,
> + .from = 0,
> + .len = 0
> + };
>
> - request.type = NBD_CMD_DISC;
> - request.from = 0;
> - request.len = 0;
> nbd_send_request(client->sock, &request);
>
> qemu_aio_set_fd_handler(client->sock, NULL, NULL, NULL);
>
Reviewed-by: Paolo Bonzini <address@hidden>
- Re: [Qemu-devel] [PATCH 08/13] Split nbd block client code, (continued)
- [Qemu-devel] [PATCH 09/13] nbd: don't change socket block during negotiate, Marc-André Lureau, 2013/11/29
- [Qemu-devel] [PATCH 10/13] nbd: pass export name as init argument, Marc-André Lureau, 2013/11/29
- [Qemu-devel] [PATCH 11/13] nbd: make session_close() idempotent, Marc-André Lureau, 2013/11/29
- [Qemu-devel] [PATCH 12/13] nbd: finish any pending coroutine, Marc-André Lureau, 2013/11/29
- [Qemu-devel] [PATCH 13/13] nbd: avoid uninitialized warnings, Marc-André Lureau, 2013/11/29
- Re: [Qemu-devel] [PATCH 13/13] nbd: avoid uninitialized warnings,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH 00/13] Spice block device, ready-to-go patches, Paolo Bonzini, 2013/11/29