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| author | David Howells <dhowells@redhat.com> | 2021-11-26 14:59:10 +0000 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2022-01-07 13:41:14 +0000 |
| commit | 254947d47945f2fa02e9b3366594fad2ed127618 (patch) | |
| tree | b65de1ad1bcbbc7bfe9aefccff113b9285d2cdf0 /fs/cachefiles/Makefile | |
| parent | 1493bf74bcf2434a840eacef60c0f56966faa11a (diff) | |
| download | linux-stable-254947d47945f2fa02e9b3366594fad2ed127618.tar.gz linux-stable-254947d47945f2fa02e9b3366594fad2ed127618.tar.bz2 linux-stable-254947d47945f2fa02e9b3366594fad2ed127618.zip | |
cachefiles: Add security derivation
Implement code to derive a new set of creds for the cachefiles to use when
making VFS or I/O calls and to change the auditing info since the
application interacting with the network filesystem is not accessing the
cache directly. Cachefiles uses override_creds() to change the effective
creds temporarily.
set_security_override_from_ctx() is called to derive the LSM 'label' that
the cachefiles driver will act with. set_create_files_as() is called to
determine the LSM 'label' that will be applied to files and directories
created in the cache. These functions alter the new creds.
Also implement a couple of functions to wrap the calls to begin/end cred
overriding.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
Link: https://lore.kernel.org/r/163819627469.215744.3603633690679962985.stgit@warthog.procyon.org.uk/ # v1
Link: https://lore.kernel.org/r/163906928172.143852.15886637013364286786.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/163967138138.1823006.7620933448261939504.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/164021537001.640689.4081334436031700558.stgit@warthog.procyon.org.uk/ # v4
Diffstat (limited to 'fs/cachefiles/Makefile')
| -rw-r--r-- | fs/cachefiles/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/cachefiles/Makefile b/fs/cachefiles/Makefile index 183fb5f3b8b1..28bbb0d14868 100644 --- a/fs/cachefiles/Makefile +++ b/fs/cachefiles/Makefile @@ -4,7 +4,8 @@ # cachefiles-y := \ - main.o + main.o \ + security.o cachefiles-$(CONFIG_CACHEFILES_ERROR_INJECTION) += error_inject.o |