From: Kuan-Wei Chiu <visitorckw@xxxxxxxxx> [ Upstream commit 0d3ad1917996839a5042d18f04e41915cfa1b74a ] In the previous code, there was a memory leak issue where the previously allocated memory was not freed upon a failed krealloc operation. This patch addresses the problem by releasing the old memory before setting the pointer to NULL in case of a krealloc failure. This ensures that memory is properly managed and avoids potential memory leaks. Signed-off-by: Kuan-Wei Chiu <visitorckw@xxxxxxxxx> Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/firmware/efi/efi.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index b43e5e6ddaf6e..b7c0e8cc0764f 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -245,9 +245,13 @@ static __init int efivar_ssdt_load(void) if (status == EFI_NOT_FOUND) { break; } else if (status == EFI_BUFFER_TOO_SMALL) { - name = krealloc(name, name_size, GFP_KERNEL); - if (!name) + efi_char16_t *name_tmp = + krealloc(name, name_size, GFP_KERNEL); + if (!name_tmp) { + kfree(name); return -ENOMEM; + } + name = name_tmp; continue; } -- 2.42.0