linux/security
Yang Xu 4b67e5afc2 KEYS: reaching the keys quotas correctly
commit 2e356101e7 upstream.

Currently, when we add a new user key, the calltrace as below:

add_key()
  key_create_or_update()
    key_alloc()
    __key_instantiate_and_link
      generic_key_instantiate
        key_payload_reserve
          ......

Since commit a08bf91ce2 ("KEYS: allow reaching the keys quotas exactly"),
we can reach max bytes/keys in key_alloc, but we forget to remove this
limit when we reserver space for payload in key_payload_reserve. So we
can only reach max keys but not max bytes when having delta between plen
and type->def_datalen. Remove this limit when instantiating the key, so we
can keep consistent with key_alloc.

Also, fix the similar problem in keyctl_chown_key().

Fixes: 0b77f5bfb4 ("keys: make the keyring quotas controllable through /proc/sys")
Fixes: a08bf91ce2 ("KEYS: allow reaching the keys quotas exactly")
Cc: stable@vger.kernel.org # 5.0.x
Cc: Eric Biggers <ebiggers@google.com>
Signed-off-by: Yang Xu <xuyang2018.jy@cn.fujitsu.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-17 10:50:11 +02:00
..
apparmor
integrity efi: Only print errors about failing to get certs if EFI vars are found 2020-03-12 13:00:14 +01:00
keys KEYS: reaching the keys quotas correctly 2020-04-17 10:50:11 +02:00
loadpin
lockdown
safesetid
selinux selinux: ensure we cleanup the internal AVC counters on error in avc_update() 2020-02-24 08:36:39 +01:00
smack broken ping to ipv6 linklocal addresses on debian buster 2020-02-11 04:35:43 -08:00
tomoyo
yama
Kconfig
Kconfig.hardening
Makefile
commoncap.c
device_cgroup.c
inode.c
lsm_audit.c
min_addr.c
security.c