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certs: don't try to update blacklist keys

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When the same key is blacklisted repeatedly logging at pr_err() level is
excessive as no functionality is impaired.
When these duplicates are provided by buggy firmware there is nothing
the user can do to fix the situation.
Instead of spamming the bootlog with errors we use a warning that can
still be seen by OEMs when testing their firmware.

Link: https://lore.kernel.org/all/c8c65713-5cda-43ad-8018-20f2e32e4432@t-8ch.de/
Link: https://lore.kernel.org/all/20221104014704.3469-1-linux@weissschuh.net/
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Tested-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
This commit is contained in:
Thomas Weißschuh 2023-01-09 23:59:43 +00:00 committed by Jarkko Sakkinen
parent 6c1976addf
commit c95e8f6fd1
1 changed files with 12 additions and 9 deletions
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5
certs/blacklist.c
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@ -183,7 +183,7 @@ static int mark_raw_hash_blacklisted(const char *hash)
{
key_ref_t key;
key = key_create_or_update(make_key_ref(blacklist_keyring, true),
key = key_create(make_key_ref(blacklist_keyring, true),
"blacklist",
hash,
NULL,
@ -192,6 +192,9 @@ static int mark_raw_hash_blacklisted(const char *hash)
KEY_ALLOC_NOT_IN_QUOTA |
KEY_ALLOC_BUILT_IN);
if (IS_ERR(key)) {
if (PTR_ERR(key) == -EEXIST)
pr_warn("Duplicate blacklisted hash %s\n", hash);
else
pr_err("Problem blacklisting hash %s: %pe\n", hash, key);
return PTR_ERR(key);
}