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| author |   Christian Brauner <christian.brauner@ubuntu.com> | 2021-01-21 14:19:42 +0100 |
|---|---|---|
| committer | Christian Brauner <christian.brauner@ubuntu.com> | 2021-01-24 14:27:19 +0100 |
| commit | 1ab29965b30599c797266eb3b970b4e6c8de3672 (patch) | |
| tree | 3fcc302263b0b5a129712eef9716e1cf9ef9e2ff /fs/9p/vfs_inode.c | |
| parent | would_dump: handle idmapped mounts (diff) | |
| download | linux-dev-1ab29965b30599c797266eb3b970b4e6c8de3672.tar.xz linux-dev-1ab29965b30599c797266eb3b970b4e6c8de3672.zip | |
exec: handle idmapped mounts
When executing a setuid binary the kernel will verify in bprm_fill_uid()
that the inode has a mapping in the caller's user namespace before
setting the callers uid and gid. Let bprm_fill_uid() handle idmapped
mounts. If the inode is accessed through an idmapped mount it is mapped
according to the mount's user namespace. Afterwards the checks are
identical to non-idmapped mounts. If the initial user namespace is
passed nothing changes so non-idmapped mounts will see identical
behavior as before.
Link: https://lore.kernel.org/r/20210121131959.646623-24-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: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'fs/9p/vfs_inode.c')
0 files changed, 0 insertions, 0 deletions