Christian Brauner cce9107c31 ovl: check type and offset of struct vfsmount in ovl_entry ... [ Upstream commit f723edb8a5 ] Porting overlayfs to the new amount api I started experiencing random crashes that couldn't be explained easily. So after much debugging and reasoning it became clear that struct ovl_entry requires the point to struct vfsmount to be the first member and of type struct vfsmount. During the port I added a new member at the beginning of struct ovl_entry which broke all over the place in the form of random crashes and cache corruptions. While there's a comment in ovl_free_fs() to the effect of "Hack! Reuse ofs->layers as a vfsmount array before freeing it" there's no such comment on struct ovl_entry which makes this easy to trip over. Add a comment and two static asserts for both the offset and the type of pointer in struct ovl_entry. Signed-off-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-07-27 08:50:32 +02:00
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copy_up.c	ovl: update of dentry revalidate flags after copy up	2023-07-19 16:21:33 +02:00
dir.c	ovl: update of dentry revalidate flags after copy up	2023-07-19 16:21:33 +02:00
export.c	ovl: update of dentry revalidate flags after copy up	2023-07-19 16:21:33 +02:00
file.c	ovl: update ->f_iocb_flags when ovl_change_flags() modifies ->f_flags	2023-01-04 11:29:00 +01:00
inode.c	ovl: fix null pointer dereference in ovl_get_acl_rcu()	2023-07-23 13:49:28 +02:00
Kconfig	docs: fix broken references to text files	2020-04-20 15:35:59 -06:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
namei.c	ovl: update of dentry revalidate flags after copy up	2023-07-19 16:21:33 +02:00
overlayfs.h	ovl: let helper ovl_i_path_real() return the realinode	2023-07-23 13:49:28 +02:00
ovl_entry.h	ovl: check type and offset of struct vfsmount in ovl_entry	2023-07-27 08:50:32 +02:00
readdir.c	whack-a-mole: constifying struct path *	2022-10-06 17:31:02 -07:00
super.c	ovl: update of dentry revalidate flags after copy up	2023-07-19 16:21:33 +02:00
util.c	ovl: let helper ovl_i_path_real() return the realinode	2023-07-23 13:49:28 +02:00