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author | David Howells <dhowells@redhat.com> | 2023-08-08 13:34:20 +0200 |
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committer | Christian Brauner <brauner@kernel.org> | 2023-08-15 08:32:30 +0200 |
commit | d80a8f1b58c2bc8d7c6bfb65401ea4f7ec8cddc2 (patch) | |
tree | f20b825962286f47e36e6e4e3d0f0e4a62549f16 /security/tomoyo | |
parent | fs: unexport d_genocide (diff) | |
download | linux-d80a8f1b58c2bc8d7c6bfb65401ea4f7ec8cddc2.tar.xz linux-d80a8f1b58c2bc8d7c6bfb65401ea4f7ec8cddc2.zip |
vfs, security: Fix automount superblock LSM init problem, preventing NFS sb sharing
When NFS superblocks are created by automounting, their LSM parameters
aren't set in the fs_context struct prior to sget_fc() being called,
leading to failure to match existing superblocks.
This bug leads to messages like the following appearing in dmesg when
fscache is enabled:
NFS: Cache volume key already in use (nfs,4.2,2,108,106a8c0,1,,,,100000,100000,2ee,3a98,1d4c,3a98,1)
Fix this by adding a new LSM hook to load fc->security for submount
creation.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://lore.kernel.org/r/165962680944.3334508.6610023900349142034.stgit@warthog.procyon.org.uk/ # v1
Link: https://lore.kernel.org/r/165962729225.3357250.14350728846471527137.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/165970659095.2812394.6868894171102318796.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/166133579016.3678898.6283195019480567275.stgit@warthog.procyon.org.uk/ # v4
Link: https://lore.kernel.org/r/217595.1662033775@warthog.procyon.org.uk/ # v5
Fixes: 9bc61ab18b1d ("vfs: Introduce fs_context, switch vfs_kern_mount() to it.")
Fixes: 779df6a5480f ("NFS: Ensure security label is set for root inode")
Tested-by: Jeff Layton <jlayton@kernel.org>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Acked-by: "Christian Brauner (Microsoft)" <brauner@kernel.org>
Acked-by: Paul Moore <paul@paul-moore.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Message-Id: <20230808-master-v9-1-e0ecde888221@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions