Messages in this thread | | | From | Eric Biggers <> | Subject | [PATCH v2 0/6] KEYS: fix atomicity issues with key flags | Date | Tue, 26 Sep 2017 13:10:59 -0700 |
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From: Eric Biggers <ebiggers@google.com>
The first patch in this series fixes the race between updating and finding a negative key, which could be used by an unprivileged user to cause a kernel oops. That patch is Cc'ed to stable.
The remaining patches fix some other, more theoretical atomicity issues with accessing key->flags and key->expiry, then eliminate KEY_FLAG_NEGATIVE, which becomes unnecessary after the first patch.
Eric Biggers (6): KEYS: fix race between updating and finding negative key KEYS: load key flags atomically in key_is_instantiated() KEYS: load key flags and expiry time atomically in key_validate() KEYS: load key flags and expiry time atomically in keyring_search_iterator() KEYS: load key flags and expiry time atomically in proc_keys_show() KEYS: remove KEY_FLAG_NEGATIVE
include/linux/key.h | 37 +++++++++++++++++++++++--------- security/keys/encrypted-keys/encrypted.c | 2 +- security/keys/gc.c | 4 +--- security/keys/key.c | 24 +++++++++++++++------ security/keys/keyctl.c | 5 ++++- security/keys/keyring.c | 12 ++++++----- security/keys/permission.c | 7 +++--- security/keys/proc.c | 28 +++++++++++++----------- security/keys/request_key.c | 11 ++++++---- security/keys/trusted.c | 2 +- security/keys/user_defined.c | 2 +- 11 files changed, 86 insertions(+), 48 deletions(-)
-- 2.14.1.992.g2c7b836f3a-goog
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