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| author | Vivek Goyal <vgoyal@redhat.com> | 2016-07-13 10:44:49 -0400 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2016-08-08 20:42:13 -0400 |
| commit | 121ab822ef21914adac2fa3730efeeb8fd762473 (patch) | |
| tree | 7fd5f6947837b361c249ec976af17bee10b22a2e /fs/overlayfs | |
| parent | 56909eb3f559103196ecbf2c08c923e0804980fb (diff) | |
| download | lwn-121ab822ef21914adac2fa3730efeeb8fd762473.tar.gz lwn-121ab822ef21914adac2fa3730efeeb8fd762473.zip | |
security,overlayfs: Provide security hook for copy up of xattrs for overlay file
Provide a security hook which is called when xattrs of a file are being
copied up. This hook is called once for each xattr and LSM can return
0 if the security module wants the xattr to be copied up, 1 if the
security module wants the xattr to be discarded on the copy, -EOPNOTSUPP
if the security module does not handle/manage the xattr, or a -errno
upon an error.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
[PM: whitespace cleanup for checkpatch.pl]
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'fs/overlayfs')
| -rw-r--r-- | fs/overlayfs/copy_up.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c index c297b1f5a05e..cd65f12b3464 100644 --- a/fs/overlayfs/copy_up.c +++ b/fs/overlayfs/copy_up.c @@ -103,6 +103,13 @@ retry: goto retry; } + error = security_inode_copy_up_xattr(name); + if (error < 0 && error != -EOPNOTSUPP) + break; + if (error == 1) { + error = 0; + continue; /* Discard */ + } error = vfs_setxattr(new, name, value, size, 0); if (error) break; |