Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
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/[email protected] Cc: Christoph Hellwig <[email protected]> Cc: David Howells <[email protected]> Cc: Al Viro <[email protected]> Cc: [email protected] Reviewed-by: Christoph Hellwig <[email protected]> Reviewed-by: James Morris <[email protected]> Signed-off-by: Christian Brauner <[email protected]>
- Loading branch information