On Fri, 22 Mar 2019 at 11:34, Lee, Chun-Yi <joeyli.kernel@xxxxxxxxx> wrote: > > When loading certificates list from UEFI variable, the original error > message direct shows the efi status code from UEFI firmware. It looks > ugly: > > [ 2.335031] Couldn't get size: 0x800000000000000e > [ 2.335032] Couldn't get UEFI MokListRT > [ 2.339985] Couldn't get size: 0x800000000000000e > [ 2.339987] Couldn't get UEFI dbx list > Why is it an error in the first place if these EFI variables do not exist? > So, this patch shows the status string instead of status code. > > On the other hand, the error message of EFI_NOT_FOUND > (0x800000000000000e) doesn't need to be exposed because kernel > already prints "Couldn't get UEFI..." message. This patch also > filtered out it. > > Link: https://forums.opensuse.org/showthread.php/535324-MODSIGN-Couldn-t-get-UEFI-db-list?p=2897516#post2897516 > Cc: James Morris <jmorris@xxxxxxxxx> > Cc: Serge E. Hallyn" <serge@xxxxxxxxxx> > Cc: David Howells <dhowells@xxxxxxxxxx> > Cc: Nayna Jain <nayna@xxxxxxxxxxxxx> > Cc: Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx> > Cc: Mimi Zohar <zohar@xxxxxxxxxxxxx> > Signed-off-by: "Lee, Chun-Yi" <jlee@xxxxxxxx> > --- > security/integrity/platform_certs/load_uefi.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/security/integrity/platform_certs/load_uefi.c b/security/integrity/platform_certs/load_uefi.c > index 81b19c52832b..fe261166621f 100644 > --- a/security/integrity/platform_certs/load_uefi.c > +++ b/security/integrity/platform_certs/load_uefi.c > @@ -48,7 +48,9 @@ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid, > > status = efi.get_variable(name, guid, NULL, &lsize, &tmpdb); > if (status != EFI_BUFFER_TOO_SMALL) { > - pr_err("Couldn't get size: 0x%lx\n", status); > + if (status != EFI_NOT_FOUND) > + pr_err("Couldn't get size: %s\n", > + efi_status_to_str(status)); > return NULL; > } > > @@ -59,7 +61,8 @@ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid, > status = efi.get_variable(name, guid, NULL, &lsize, db); > if (status != EFI_SUCCESS) { > kfree(db); > - pr_err("Error reading db var: 0x%lx\n", status); > + pr_err("Error reading db var: %s\n", > + efi_status_to_str(status)); > return NULL; > } > > -- > 2.16.4 >
