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vinput: Fix NULL pointer dereference caused by failed kzalloc allocation

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When kzalloc fails to allocate memory and returns NULL, it leads to a
NULL pointer dereference error later on. Add a check for the return
value of kzalloc. When kzalloc fails to allocate memory, it prints an
error message and returns ERR_PTR(-ENOMEM).
This commit is contained in:
Kuan-Wei Chiu 2024-05-09 01:11:20 +08:00
parent 1e26743c30
commit c068fa47e9
1 changed files with 5 additions and 0 deletions
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5
examples/vinput.c
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@ -177,6 +177,11 @@ static struct vinput *vinput_alloc_vdevice(void)
int err; int err;
struct vinput *vinput = kzalloc(sizeof(struct vinput), GFP_KERNEL); struct vinput *vinput = kzalloc(sizeof(struct vinput), GFP_KERNEL);
if (!vinput) {
pr_err("vinput: Cannot allocate vinput input device\n");
return ERR_PTR(-ENOMEM);
}
try_module_get(THIS_MODULE); try_module_get(THIS_MODULE);
spin_lock_init(&vinput->lock); spin_lock_init(&vinput->lock);