[PATCH v4 11/21] cred: Reject inodes with invalid ids in set_create_file_as()
From: Seth Forshee <hidden>
Date: 2016-04-26 19:37:05
Also in:
cgroups, dm-devel, linux-bcache, linux-fsdevel, lkml, selinux
Subsystem:
credentials, the rest · Maintainers:
Paul Moore, Linus Torvalds
Using INVALID_[UG]ID for the LSM file creation context doesn't make sense, so return an error if the inode passed to set_create_file_as() has an invalid id. Signed-off-by: Seth Forshee <redacted> Acked-by: Serge Hallyn <redacted> --- kernel/cred.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/cred.c b/kernel/cred.c
index 0c0cd8a62285..5f264fb5737d 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c@@ -689,6 +689,8 @@ EXPORT_SYMBOL(set_security_override_from_ctx); */ int set_create_files_as(struct cred *new, struct inode *inode) { + if (!uid_valid(inode->i_uid) || !gid_valid(inode->i_gid)) + return -EINVAL; new->fsuid = inode->i_uid; new->fsgid = inode->i_gid; return security_kernel_create_files_as(new, inode);
--
2.7.4
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