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hw/cxl: cdat: Fix open file not closed in ct3_load_cdat() 

Open file descriptor not closed in error paths. Fix by replace
open coded handling of read of whole file into a buffer with
g_file_get_contents()

Fixes: aba578bdac ("hw/cxl: CDAT Data Object Exchange implementation")
Signed-off-by: Zeng Hao <zenghao@kylinos.cn>
Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Suggested-by: Jonathan Cameron via <qemu-devel@nongnu.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

--
Changes since v5:
- Drop if guard on g_free() as per checkpatch warning.
Message-Id: <20230421132020.7408-2-Jonathan.Cameron@huawei.com>
Reviewed-by: Fan Ni <fan.ni@samsung.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
master
Hao Zeng 2023-04-21 14:20:19 +01:00 committed by Michael S. Tsirkin
parent 5d410557de
commit 71ba92f348
1 changed files with 8 additions and 21 deletions
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29
hw/cxl/cxl-cdat.c
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@ -110,29 +110,18 @@ static void ct3_load_cdat(CDATObject *cdat, Error **errp)
g_autofree CDATEntry *cdat_st = NULL;
uint8_t sum = 0;
int num_ent;
int i = 0, ent = 1, file_size = 0;
int i = 0, ent = 1;
gsize file_size = 0;
CDATSubHeader *hdr;
FILE *fp = NULL;
GError *error = NULL;
/* Read CDAT file and create its cache */
fp = fopen(cdat->filename, "r");
if (!fp) {
error_setg(errp, "CDAT: Unable to open file");
if (!g_file_get_contents(cdat->filename, (gchar **)&cdat->buf,
&file_size, &error)) {
error_setg(errp, "CDAT: File read failed: %s", error->message);
g_error_free(error);
return;
}
fseek(fp, 0, SEEK_END);
file_size = ftell(fp);
fseek(fp, 0, SEEK_SET);
cdat->buf = g_malloc0(file_size);
if (fread(cdat->buf, file_size, 1, fp) == 0) {
error_setg(errp, "CDAT: File read failed");
return;
}
fclose(fp);
if (file_size < sizeof(CDATTableHeader)) {
error_setg(errp, "CDAT: File too short");
return;
@ -218,7 +207,5 @@ void cxl_doe_cdat_release(CXLComponentState *cxl_cstate)
cdat->free_cdat_table(cdat->built_buf, cdat->built_buf_len,
cdat->private);
}
if (cdat->buf) {
free(cdat->buf);
}
g_free(cdat->buf);
}