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linux/security/apparmor
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Xiyu Yang a0b845ffa0 apparmor: fix potential label refcnt leak in aa_change_profile 
aa_change_profile() invokes aa_get_current_label(), which returns
a reference of the current task's label.

According to the comment of aa_get_current_label(), the returned
reference must be put with aa_put_label().
However, when the original object pointed by "label" becomes
unreachable because aa_change_profile() returns or a new object
is assigned to "label", reference count increased by
aa_get_current_label() is not decreased, causing a refcnt leak.

Fix this by calling aa_put_label() before aa_change_profile() return
and dropping unnecessary aa_get_current_label().

Fixes: 9fcf78cca198 ("apparmor: update domain transitions that are subsets of confinement at nnp")
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2020-05-21 15:25:51 -07:00
..
include
+ Features
2019-12-03 12:51:35 -08:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
apparmorfs.c
Merge branch 'work.openat2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-01-29 11:20:24 -08:00
audit.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
capability.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
crypto.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
domain.c
apparmor: fix potential label refcnt leak in aa_change_profile
2020-05-21 15:25:51 -07:00
file.c
apparmor: only get a label reference if the fast path check fails
2020-01-02 05:31:40 -08:00
ipc.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
Kconfig
kunit: building kunit as a module breaks allmodconfig
2020-01-10 14:36:37 -07:00
label.c
+ Features
2019-12-03 12:51:35 -08:00
lib.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
lsm.c
+ Features
2019-12-03 12:51:35 -08:00
Makefile
apparmor: add base infastructure for socket mediation
2018-03-13 17:25:48 -07:00
match.c
+ Features
2019-12-03 12:51:35 -08:00
mount.c
apparmor: fix bind mounts aborting with -ENOMEM
2020-01-02 05:31:40 -08:00
net.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
nulldfa.in
apparmor: cleanup add proper line wrapping to nulldfa.in
2018-02-09 11:30:01 -08:00
path.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
policy_ns.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
policy_unpack_test.c
apparmor: add AppArmor KUnit tests for policy unpack
2020-01-09 16:27:43 -07:00
policy_unpack.c
apparmor: add AppArmor KUnit tests for policy unpack
2020-01-09 16:27:43 -07:00
policy.c
apparmor: fix aa_xattrs_match() may sleep while holding a RCU lock
2020-01-04 15:56:44 -08:00
procattr.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
resource.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
secid.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
stacksplitdfa.in
apparmor: use the dfa to do label parse string splitting
2018-02-09 11:30:01 -08:00
task.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00