diff options
| author | Tianyue Ren <rentianyue@kylinos.cn> | 2020-10-09 09:36:30 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-29 13:46:51 +0100 |
| commit | ce7acf72db8c4dbf7e9e9aa942ab26342a60ab7c (patch) | |
| tree | b0bb6c7b5889c3895e9718cbebc55e340233749f /security/selinux | |
| parent | 604f1f43d62f1841c472cab2c82f73d04e32eeed (diff) | |
selinux: fix error initialization in inode_doinit_with_dentry()
[ Upstream commit 83370b31a915493231e5b9addc72e4bef69f8d31 ]
Mark the inode security label as invalid if we cannot find
a dentry so that we will retry later rather than marking it
initialized with the unlabeled SID.
Fixes: 9287aed2ad1f ("selinux: Convert isec->lock into a spinlock")
Signed-off-by: Tianyue Ren <rentianyue@kylinos.cn>
[PM: minor comment tweaks]
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'security/selinux')
| -rw-r--r-- | security/selinux/hooks.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 5def19ec1179..af8ddae0dded 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -1569,7 +1569,13 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent * inode_doinit with a dentry, before these inodes could * be used again by userspace. */ - goto out; + isec->initialized = LABEL_INVALID; + /* + * There is nothing useful to jump to the "out" + * label, except a needless spin lock/unlock + * cycle. + */ + return 0; } len = INITCONTEXTLEN; @@ -1677,8 +1683,15 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent * inode_doinit() with a dentry, before these inodes * could be used again by userspace. */ - if (!dentry) - goto out; + if (!dentry) { + isec->initialized = LABEL_INVALID; + /* + * There is nothing useful to jump to the "out" + * label, except a needless spin lock/unlock + * cycle. + */ + return 0; + } rc = selinux_genfs_get_sid(dentry, sclass, sbsec->flags, &sid); dput(dentry); |