* [PATCH 1/1] efi_loader: NULL dereference in efi_convert_pointer
@ 2020-07-07 1:46 Heinrich Schuchardt
0 siblings, 0 replies; only message in thread
From: Heinrich Schuchardt @ 2020-07-07 1:46 UTC (permalink / raw)
To: u-boot
Avoid a possible NULL pointer dereference in efi_convert_pointer().
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
---
lib/efi_loader/efi_runtime.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c
index c0bd99b867..121e2f65c6 100644
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -499,7 +499,7 @@ static __efi_runtime efi_status_t EFIAPI efi_convert_pointer_runtime(
static __efi_runtime efi_status_t EFIAPI efi_convert_pointer(
efi_uintn_t debug_disposition, void **address)
{
- efi_physical_addr_t addr = (uintptr_t)*address;
+ efi_physical_addr_t addr;
efi_uintn_t i;
efi_status_t ret = EFI_NOT_FOUND;
@@ -515,6 +515,7 @@ static __efi_runtime efi_status_t EFIAPI efi_convert_pointer(
goto out;
}
+ addr = (uintptr_t)*address;
for (i = 0; i < efi_descriptor_count; i++) {
struct efi_mem_desc *map = (void *)efi_virtmap +
(efi_descriptor_size * i);
--
2.27.0
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2020-07-07 1:46 [PATCH 1/1] efi_loader: NULL dereference in efi_convert_pointer Heinrich Schuchardt
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