diff options
| author | Kuan-Wei Chiu <visitorckw@gmail.com> | 2023-09-24 22:26:33 +0800 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2023-10-13 12:32:37 +0200 |
| commit | 0d3ad1917996839a5042d18f04e41915cfa1b74a (patch) | |
| tree | 891cd5b7328e3efd4a8f6c0a53a7b79fb66bfa31 /drivers/firmware/efi | |
| parent | ff07186b4d774ac22a5345d30763045af4569416 (diff) | |
| download | linux-0d3ad1917996839a5042d18f04e41915cfa1b74a.tar.gz linux-0d3ad1917996839a5042d18f04e41915cfa1b74a.tar.bz2 linux-0d3ad1917996839a5042d18f04e41915cfa1b74a.zip | |
efi: fix memory leak in krealloc failure handling
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@gmail.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'drivers/firmware/efi')
| -rw-r--r-- | drivers/firmware/efi/efi.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 1599f1176842..9cfac61812f6 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -273,9 +273,13 @@ 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; } |