5.15-stable review patch. If anyone has any objections, please let me know.
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From: Jarkko Sakkinen jarkko@kernel.org
commit 31de287345f41bbfaec36a5c8cbdba035cf76442 upstream.
Do bind neither static calls nor trusted_key_exit() before a successful init, in order to maintain a consistent state. In addition, depart the init_trusted() in the case of a real error (i.e. getting back something else than -ENODEV).
Reported-by: Linus Torvalds torvalds@linux-foundation.org Closes: https://lore.kernel.org/linux-integrity/CAHk-=whOPoLaWM8S8GgoOPT7a2+nMH5h3TL... Cc: stable@vger.kernel.org # v5.13+ Fixes: 5d0682be3189 ("KEYS: trusted: Add generic trusted keys framework") Signed-off-by: Jarkko Sakkinen jarkko@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- security/keys/trusted-keys/trusted_core.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-)
--- a/security/keys/trusted-keys/trusted_core.c +++ b/security/keys/trusted-keys/trusted_core.c @@ -354,17 +354,17 @@ static int __init init_trusted(void) if (!get_random) get_random = kernel_get_random;
- static_call_update(trusted_key_seal, - trusted_key_sources[i].ops->seal); - static_call_update(trusted_key_unseal, - trusted_key_sources[i].ops->unseal); - static_call_update(trusted_key_get_random, - get_random); - trusted_key_exit = trusted_key_sources[i].ops->exit; - migratable = trusted_key_sources[i].ops->migratable; - ret = trusted_key_sources[i].ops->init(); - if (!ret) + if (!ret) { + static_call_update(trusted_key_seal, trusted_key_sources[i].ops->seal); + static_call_update(trusted_key_unseal, trusted_key_sources[i].ops->unseal); + static_call_update(trusted_key_get_random, get_random); + + trusted_key_exit = trusted_key_sources[i].ops->exit; + migratable = trusted_key_sources[i].ops->migratable; + } + + if (!ret || ret != -ENODEV) break; }