linux/security/apparmor
Tycho Andersen c7c7a1a18a
xattr: handle idmapped mounts
When interacting with extended attributes the vfs verifies that the
caller is privileged over the inode with which the extended attribute is
associated. For posix access and posix default extended attributes a uid
or gid can be stored on-disk. Let the functions handle posix extended
attributes on idmapped mounts. If the inode is accessed through an
idmapped mount we need to map it according to the mount's user
namespace. Afterwards the checks are identical to non-idmapped mounts.
This has no effect for e.g. security xattrs since they don't store uids
or gids and don't perform permission checks on them like posix acls do.

Link: https://lore.kernel.org/r/20210121131959.646623-10-christian.brauner@ubuntu.com
Cc: Christoph Hellwig <hch@lst.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Morris <jamorris@linux.microsoft.com>
Signed-off-by: Tycho Andersen <tycho@tycho.pizza>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
2021-01-24 14:27:17 +01:00
..
include security: add const qualifier to struct sock in various places 2020-12-03 12:56:03 -08:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
apparmorfs.c apparmor: remove duplicate macro list_entry_is_head() 2020-12-15 22:46:19 -08:00
audit.c audit: purge audit_log_string from the intra-kernel audit API 2020-07-21 11:12:31 -04:00
capability.c
crypto.c
domain.c xattr: handle idmapped mounts 2021-01-24 14:27:17 +01:00
file.c audit: purge audit_log_string from the intra-kernel audit API 2020-07-21 11:12:31 -04:00
ipc.c audit: purge audit_log_string from the intra-kernel audit API 2020-07-21 11:12:31 -04:00
Kconfig Minor fixes for v5.9. 2020-08-11 14:30:36 -07:00
label.c apparmor: Fix memory leak of profile proxy 2020-06-07 13:38:55 -07:00
lib.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
lsm.c security: add const qualifier to struct sock in various places 2020-12-03 12:56:03 -08:00
Makefile
match.c apparmor: ensure that dfa state tables have entries 2020-04-08 04:42:48 -07:00
mount.c apparmor: fix bind mounts aborting with -ENOMEM 2020-01-02 05:31:40 -08:00
net.c security: add const qualifier to struct sock in various places 2020-12-03 12:56:03 -08:00
nulldfa.in
path.c AppArmor: Remove semicolon 2020-01-18 15:36:58 -08:00
policy_ns.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
policy_unpack_test.c apparmor: add AppArmor KUnit tests for policy unpack 2020-01-09 16:27:43 -07:00
policy_unpack.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
policy.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
procattr.c
resource.c
secid.c
stacksplitdfa.in
task.c