diff options
| author | Stefan Metzmacher <metze@samba.org> | 2026-04-10 12:48:54 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-22 13:32:17 +0200 |
| commit | 830de6eeb9db4cb7e758201fb99328ef4ca4b032 (patch) | |
| tree | e2805e3615d6889d1f9299a58ad6a7ced38a8011 | |
| parent | f9a162c2bbcd0ac85bd07c5b37cf20286048b65c (diff) | |
smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list()
commit 84ff995ae826aa6bbcc6c7b9ea569ff67c021d72 upstream.
smb_direct_flush_send_list() already calls smb_direct_free_sendmsg(),
so we should not call it again after post_sendmsg()
moved it to the batch list.
Reported-by: Ruikai Peng <ruikai@pwno.io>
Closes: https://lore.kernel.org/linux-cifs/CAFD3drNOSJ05y3A+jNXSDxW-2w09KHQ0DivhxQ_pcc7immVVOQ@mail.gmail.com/
Fixes: 34abd408c8ba ("smb: server: make use of smbdirect_socket.send_io.bcredits")
Cc: stable@kernel.org
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Ruikai Peng <ruikai@pwno.io>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Cc: security@kernel.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Acked-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Tested-by: Ruikai Peng <ruikai@pwno.io>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/smb/server/transport_rdma.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/smb/server/transport_rdma.c b/fs/smb/server/transport_rdma.c index 188572491d53..dbc8dedb85dc 100644 --- a/fs/smb/server/transport_rdma.c +++ b/fs/smb/server/transport_rdma.c @@ -1588,15 +1588,21 @@ static int smb_direct_post_send_data(struct smbdirect_socket *sc, if (ret) goto err; + /* + * From here msg is moved to send_ctx + * and we should not free it explicitly. + */ + if (send_ctx == &_send_ctx) { ret = smb_direct_flush_send_list(sc, send_ctx, true); if (ret) - goto err; + goto flush_failed; } return 0; err: smb_direct_free_sendmsg(sc, msg); +flush_failed: header_failed: atomic_inc(&sc->send_io.credits.count); credit_failed: |