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| author | Al Viro <viro@zeniv.linux.org.uk> | 2025-06-06 18:31:03 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-19 15:41:07 +0200 |
| commit | 917677d599e269bf0495e1a314f16232ed586b7b (patch) | |
| tree | 590de1ebcaa87fe8fd1b615b9591aed21292d01d /drivers/fpga/fpga-bridge.c | |
| parent | c3e3a011adebe5cfb286c7bdc5ff2f202b21e568 (diff) | |
do_move_mount(): split the checks in subtree-of-our-ns and entire-anon cases
commit 290da20e333955637f00647d9fff7c6e3c0b61e0 upstream.
... and fix the breakage in anon-to-anon case. There are two cases
acceptable for do_move_mount() and mixing checks for those is making
things hard to follow.
One case is move of a subtree in caller's namespace.
* source and destination must be in caller's namespace
* source must be detachable from parent
Another is moving the entire anon namespace elsewhere
* source must be the root of anon namespace
* target must either in caller's namespace or in a suitable
anon namespace (see may_use_mount() for details).
* target must not be in the same namespace as source.
It's really easier to follow if tests are *not* mixed together...
Reviewed-by: Christian Brauner <brauner@kernel.org>
Fixes: 3b5260d12b1f ("Don't propagate mounts into detached trees")
Reported-by: Allison Karlitskaya <lis@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga/fpga-bridge.c')
0 files changed, 0 insertions, 0 deletions