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| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-08-23 10:59:17 +0200 |
|---|---|---|
| committer | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-08-24 16:37:53 +0200 |
| commit | 15d8f008dc577bbef6ad98494c28553558941420 (patch) | |
| tree | ac0e32cc27ea556382bd1b5f90bc611ead1d808c /lib | |
| parent | 5bba77e48be801176a55223b1f76bc44e8e1b3cb (diff) | |
efi_loader: validate device path length in boot manager
Bootxxxx variables are provided by the user and therefore cannot be
trusted. We have to validate them before usage.
A device path provided by a Bootxxxx variable must have an end node within
the indicated device path length.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/efi_loader/efi_bootmgr.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/lib/efi_loader/efi_bootmgr.c b/lib/efi_loader/efi_bootmgr.c index 1e06e60963..61dc72a23d 100644 --- a/lib/efi_loader/efi_bootmgr.c +++ b/lib/efi_loader/efi_bootmgr.c @@ -105,10 +105,8 @@ efi_status_t efi_deserialize_load_option(struct efi_load_option *lo, u8 *data, if (*size < len) return EFI_INVALID_PARAMETER; lo->file_path = (struct efi_device_path *)data; - /* - * TODO: validate device path. There should be an end node within - * the indicated file_path_length. - */ + if (efi_dp_check_length(lo->file_path, len) < 0) + return EFI_INVALID_PARAMETER; data += len; *size -= len; |