There is a single kmalloc in this driver, and it's not currently
guarded against allocation failure. Do it here by just bailing-out
the reboot handler, in case this tentative allocation fails.
Fixes: 416581e48679 ("efi: efibc: avoid efivar API for setting variables")
Signed-off-by: Guilherme G. Piccoli <gpiccoli@xxxxxxxxxx>
---
V2:
* Rebased against 6.0-rc4;
* Dropped from the original series [0].
[0] https://lore.kernel.org/linux-efi/20220729194532.228403-1-gpiccoli@xxxxxxxxxx/
drivers/firmware/efi/efibc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/firmware/efi/efibc.c b/drivers/firmware/efi/efibc.c
index 8ced7af8e56d..4f9fb086eab7 100644
--- a/drivers/firmware/efi/efibc.c
+++ b/drivers/firmware/efi/efibc.c
@@ -48,6 +48,9 @@ static int efibc_reboot_notifier_call(struct notifier_block *notifier,
return NOTIFY_DONE;
wdata = kmalloc(MAX_DATA_LEN * sizeof(efi_char16_t), GFP_KERNEL);
+ if (!wdata)
+ return NOTIFY_DONE;
+
for (l = 0; l < MAX_DATA_LEN - 1 && str[l] != '\0'; l++)
wdata[l] = str[l];
wdata[l] = L'\0';
--
2.37.2
