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numa: Check for qemu_strtosz_MiB error

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As shown in the previous commit, qemu_strtosz_MiB sometimes leaves the
result value untouched (we have to audit further to learn that in that
case, the QAPI generator says that visit_type_NumaOptions() will have
zero-initialized it), and sometimes leaves it with the value of a
partial parse before -EINVAL occurs because of trailing garbage.
Rather than blindly treating any string the user may throw at us as
valid, we should check for parse failures.

Fixes: cc001888 ("numa: fixup parsed NumaNodeOptions earlier", v2.11.0)
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230522190441.64278-14-eblake@redhat.com>
This commit is contained in:
Eric Blake 2023-05-22 14:04:35 -05:00
parent f49371ecae
commit a73049b2a1
1 changed files with 9 additions and 2 deletions
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11
hw/core/numa.c
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@ -531,10 +531,17 @@ static int parse_numa(void *opaque, QemuOpts *opts, Error **errp)
/* Fix up legacy suffix-less format */
if ((object->type == NUMA_OPTIONS_TYPE_NODE) && object->u.node.has_mem) {
const char *mem_str = qemu_opt_get(opts, "mem");
qemu_strtosz_MiB(mem_str, NULL, &object->u.node.mem);
int ret = qemu_strtosz_MiB(mem_str, NULL, &object->u.node.mem);
if (ret < 0) {
error_setg_errno(&err, -ret, "could not parse memory size '%s'",
mem_str);
}
}
set_numa_options(ms, object, &err);
if (!err) {
set_numa_options(ms, object, &err);
}
qapi_free_NumaOptions(object);
if (err) {