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From: | Stefan Berger |
Subject: | Re: [Qemu-devel] [PATCH 32/42] tpm-passthrough: make it safer to destroy after creation |
Date: | Tue, 10 Oct 2017 14:13:31 -0400 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 |
On 10/09/2017 06:56 PM, Marc-André Lureau wrote:
Check fds values before closing, to avoid close(-1). Signed-off-by: Marc-André Lureau <address@hidden>
Typicall free() can be called with a NULL pointer. I am also fine with this change here, but could we move the fd < 0 check into qemu_close?
Reviewed-by: Stefan Berger <address@hidden>
--- hw/tpm/tpm_passthrough.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c index 7371d50739..aa9167e3c6 100644 --- a/hw/tpm/tpm_passthrough.c +++ b/hw/tpm/tpm_passthrough.c @@ -347,8 +347,12 @@ static void tpm_passthrough_inst_finalize(Object *obj)tpm_passthrough_cancel_cmd(TPM_BACKEND(obj)); - qemu_close(tpm_pt->tpm_fd);- qemu_close(tpm_pt->cancel_fd); + if (tpm_pt->tpm_fd >= 0) { + qemu_close(tpm_pt->tpm_fd); + } + if (tpm_pt->cancel_fd >= 0) { + qemu_close(tpm_pt->cancel_fd); + } qapi_free_TPMPassthroughOptions(tpm_pt->options); }
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