Jann Horn 0b9dc6c9f0 keys: safe concurrent user->{session,uid}_keyring access ...

The current code can perform concurrent updates and reads on
user->session_keyring and user->uid_keyring. Add a comment to
struct user_struct to document the nontrivial locking semantics, and use
READ_ONCE() for unlocked readers and smp_store_release() for writers to
prevent memory ordering issues.

Fixes: 69664cf16af4 ("keys: don't generate user and user session keyrings unless they're accessed")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: James Morris <james.morris@microsoft.com>

2019-04-10 10:29:50 -07:00

..

encrypted-keys

encrypted-keys: fix Opt_err/Opt_error = -1

2019-02-04 17:36:01 -05:00

big_key.c

big key: get rid of stack array allocation

2018-05-11 13:07:45 -07:00

compat_dh.c

KEYS: DH: validate __spare field

2017-07-14 11:01:38 +10:00

compat.c

KEYS: Provide keyctls to drive the new key type ops for asymmetric keys [ver #2]

2018-10-26 09:30:46 +01:00

dh.c

Revert "uapi/linux/keyctl.h: don't use C++ reserved keyword as a struct member name"

2018-09-25 13:28:58 +02:00

gc.c

security: audit and remove any unnecessary uses of module.h

2018-12-12 14:58:51 -08:00

internal.h

keys: Fix dependency loop between construction record and auth key

2019-02-15 14:12:09 -08:00

Kconfig

security/keys: BIG_KEY requires CONFIG_CRYPTO

2017-10-18 09:12:40 +01:00

key.c

keys: Timestamp new keys

2019-02-15 14:12:09 -08:00

keyctl_pkey.c

KEYS: fix parsing invalid pkey info string

2019-01-01 13:13:19 -08:00

keyctl.c

Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

2019-03-07 11:44:01 -08:00

keyring.c

Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

2019-03-07 11:44:01 -08:00

Makefile

KEYS: Provide keyctls to drive the new key type ops for asymmetric keys [ver #2]

2018-10-26 09:30:46 +01:00

permission.c

security: audit and remove any unnecessary uses of module.h

2018-12-12 14:58:51 -08:00

persistent.c

sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>

2017-03-02 08:42:31 +01:00

proc.c

KEYS: always initialize keyring_index_key::desc_len

2019-02-22 10:11:34 -08:00

process_keys.c

keys: safe concurrent user->{session,uid}_keyring access

2019-04-10 10:29:50 -07:00

request_key_auth.c

KEYS: always initialize keyring_index_key::desc_len

2019-02-22 10:11:34 -08:00

request_key.c

keys: safe concurrent user->{session,uid}_keyring access

2019-04-10 10:29:50 -07:00

sysctl.c

security: Convert use of typedef ctl_table to struct ctl_table

2014-04-15 13:39:58 +10:00

trusted.c

tpm: pass an array of tpm_extend_digest structures to tpm_pcr_extend()

2019-02-13 09:48:52 +02:00

user_defined.c

security: audit and remove any unnecessary uses of module.h

2018-12-12 14:58:51 -08:00