path: root/fs/9p
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authorChristian Brauner <christian.brauner@ubuntu.com>2021-01-21 14:19:42 +0100
committerChristian Brauner <christian.brauner@ubuntu.com>2021-01-24 14:27:19 +0100
commit1ab29965b30599c797266eb3b970b4e6c8de3672 (patch)
tree3fcc302263b0b5a129712eef9716e1cf9ef9e2ff /fs/9p
parentwould_dump: handle idmapped mounts (diff)
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')
0 files changed, 0 insertions, 0 deletions