[PATCH 24/28] efi: add a sanity check to efivar_store_raw()

Ard Biesheuvel
2020-03-08T08:10:35Z

From: Vladis Dronov <vdronov@redhat.com>

Add a sanity check to efivar_store_raw() the same way
efivar_{attr,size,data}_read() and efivar_show_raw() have it.

Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Link: https://lore.kernel.org/r/20200305084041.24053-3-vdronov@redhat.com
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
drivers/firmware/efi/efivars.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/firmware/efi/efivars.c b/drivers/firmware/efi/efivars.c
index 485c592d7990..78ad1ba8c987 100644
--- a/drivers/firmware/efi/efivars.c
+++ b/drivers/firmware/efi/efivars.c
@@ -208,6 +208,9 @@ efivar_store_raw(struct efivar_entry *entry, const char *buf, size_t count)
u8 *data;
int err;

+ if (!entry || !buf)
+ return -EINVAL;
+
if (in_compat_syscall()) {
struct compat_efi_variable *compat;

--
2.17.1