linux/security
Jann Horn e58f543fc7 apparmor: don't try to replace stale label in ptrace access check
[ Upstream commit 1f8266ff58 ]

As a comment above begin_current_label_crit_section() explains,
begin_current_label_crit_section() must run in sleepable context because
when label_is_stale() is true, aa_replace_current_label() runs, which uses
prepare_creds(), which can sleep.
Until now, the ptrace access check (which runs with a task lock held)
violated this rule.

Also add a might_sleep() assertion to begin_current_label_crit_section(),
because asserts are less likely to be ignored than comments.

Fixes: b2d09ae449 ("apparmor: move ptrace checks to using labels")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-01-27 14:49:55 +01:00
..
apparmor apparmor: don't try to replace stale label in ptrace access check 2020-01-27 14:49:55 +01:00
integrity
keys
loadpin
selinux LSM: generalize flag passing to security_capable 2020-01-23 08:21:29 +01:00
smack LSM: generalize flag passing to security_capable 2020-01-23 08:21:29 +01:00
tomoyo
yama
commoncap.c LSM: generalize flag passing to security_capable 2020-01-23 08:21:29 +01:00
device_cgroup.c
inode.c
Kconfig
lsm_audit.c
Makefile
min_addr.c
security.c LSM: generalize flag passing to security_capable 2020-01-23 08:21:29 +01:00