GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-03-18 05:04:04 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

apparmor: fix reference count leak in aa_pivotroot()

Browse source 
commit 11c3627ec6 upstream.

The aa_pivotroot() function has a reference counting bug in a specific
path. When aa_replace_current_label() returns on success, the function
forgets to decrement the reference count of “target”, which is
increased earlier by build_pivotroot(), causing a reference leak.

Fix it by decreasing the refcount of “target” in that path.

Fixes: 2ea3ffb778 ("apparmor: add mount mediation")
Co-developed-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Co-developed-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: Xin Xiong <xiongx18@fudan.edu.cn>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xin Xiong 2022-04-28 11:39:08 +08:00 • committed by Justin Hammond
parent 3c1d209120
commit e70778fa09
1 changed files with 1 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
security/apparmor/mount.c
View file

@ -719,6 +719,7 @@ int aa_pivotroot(struct aa_label *label, const struct path *old_path,
aa_put_label(target);
goto out;
}
aa_put_label(target);
} else
/* already audited error */
error = PTR_ERR(target);