mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 06:31:52 +00:00
716f4aaa7b
-----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZcoMdAAKCRCRxhvAZXjc ogy4AQDVp4huR6BBnRMhOCZbIsmkuHmq6ynpIZNTTAM0DdMn5AEAlJ03aEIaG9WS RQMdaYajeVpZfR/vIUg8UdVkHQxOEgw= =akNF -----END PGP SIGNATURE----- Merge tag 'vfs-6.8-rc5.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull vfs fixes from Christian Brauner: - Fix performance regression introduced by moving the security permission hook out of do_clone_file_range() and into its caller vfs_clone_file_range(). This causes the security hook to be called in situation were it wasn't called before as the fast permission checks were left in do_clone_file_range(). Fix this by merging the two implementations back together and restoring the old ordering: fast permission checks first, expensive ones later. - Tweak mount_setattr() permission checking so that mount properties on the real rootfs can be changed. When we added mount_setattr() we added additional checks compared to legacy mount(2). If the mount had a parent then verify that the caller and the mount namespace the mount is attached to match and if not make sure that it's an anonymous mount. But the real rootfs falls into neither category. It is neither an anoymous mount because it is obviously attached to the initial mount namespace but it also obviously doesn't have a parent mount. So that means legacy mount(2) allows changing mount properties on the real rootfs but mount_setattr(2) blocks this. This causes regressions (See the commit for details). Fix this by relaxing the check. If the mount has a parent or if it isn't a detached mount, verify that the mount namespaces of the caller and the mount are the same. Technically, we could probably write this even simpler and check that the mount namespaces match if it isn't a detached mount. But the slightly longer check makes it clearer what conditions one needs to think about. * tag 'vfs-6.8-rc5.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: fs: relax mount_setattr() permission checks remap_range: merge do_clone_file_range() into vfs_clone_file_range() |
||
|---|---|---|
| .. | ||
| copy_up.c | ||
| dir.c | ||
| export.c | ||
| file.c | ||
| inode.c | ||
| Kconfig | ||
| Makefile | ||
| namei.c | ||
| overlayfs.h | ||
| ovl_entry.h | ||
| params.c | ||
| params.h | ||
| readdir.c | ||
| super.c | ||
| util.c | ||
| xattrs.c | ||