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efi_loader: NULL dereference in efi_convert_pointer 

Avoid a possible NULL pointer dereference in efi_convert_pointer().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2020-07-07 03:10:12 +02:00
parent 1047c6e23c
commit a27c78fddb
1 changed files with 2 additions and 1 deletions
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3
lib/efi_loader/efi_runtime.c
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@ -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( static __efi_runtime efi_status_t EFIAPI efi_convert_pointer(
efi_uintn_t debug_disposition, void **address) 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_uintn_t i;
efi_status_t ret = EFI_NOT_FOUND; efi_status_t ret = EFI_NOT_FOUND;
@ -515,6 +515,7 @@ static __efi_runtime efi_status_t EFIAPI efi_convert_pointer(
goto out; goto out;
} }
addr = (uintptr_t)*address;
for (i = 0; i < efi_descriptor_count; i++) { for (i = 0; i < efi_descriptor_count; i++) {
struct efi_mem_desc *map = (void *)efi_virtmap + struct efi_mem_desc *map = (void *)efi_virtmap +
(efi_descriptor_size * i); (efi_descriptor_size * i);