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fw_cfg: prohibit insertion of duplicate fw_cfg file names

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Exit with an error (instead of simply logging a trace event)
whenever the same fw_cfg file name is added multiple times via
one of the fw_cfg_add_file[_callback]() host-side API calls.

Signed-off-by: Gabriel Somlo <somlo@cmu.edu>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gabriel L. Somlo 2015-04-29 11:21:52 -04:00 • committed by Gerd Hoffmann
parent 0f9b214139
commit 0eb973f915
2 changed files with 6 additions and 6 deletions
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11
hw/nvram/fw_cfg.c
View file

@ -515,18 +515,19 @@ void fw_cfg_add_file_callback(FWCfgState *s, const char *filename,
index = be32_to_cpu(s->files->count);
assert(index < FW_CFG_FILE_SLOTS);
fw_cfg_add_bytes_read_callback(s, FW_CFG_FILE_FIRST + index,
callback, callback_opaque, data, len);
pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name),
filename);
for (i = 0; i < index; i++) {
if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
trace_fw_cfg_add_file_dupe(s, s->files->f[index].name);
return;
error_report("duplicate fw_cfg file name: %s",
s->files->f[index].name);
exit(1);
}
}
fw_cfg_add_bytes_read_callback(s, FW_CFG_FILE_FIRST + index,
callback, callback_opaque, data, len);
s->files->f[index].size = cpu_to_be32(len);
s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
trace_fw_cfg_add_file(s, index, s->files->f[index].name, len);