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linux/fs/ecryptfs
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Miklos Szeredi 54c202bbeb fs: limit filesystem stacking depth 
commit 69c433ed2e upstream.

Add a simple read-only counter to super_block that indicates how deep this
is in the stack of filesystems.  Previously ecryptfs was the only stackable
filesystem and it explicitly disallowed multiple layers of itself.

Overlayfs, however, can be stacked recursively and also may be stacked
on top of ecryptfs or vice versa.

To limit the kernel stack usage we must limit the depth of the
filesystem stack.  Initially the limit is set to 2.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
[bwh: Backported to 3.16: drop changes to overlayfs]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
History 2016-08-22 22:38:27 +01:00
..
crypto.c eCryptfs: Remove buggy and unnecessary write in file name decode routine 2015-01-15 10:44:18 +00:00
debug.c eCryptfs: update comment and debug statement 2007-10-16 09:43:11 -07:00
dentry.c eCryptfs: Invalidate dcache entries when lower i_nlink is zero 2015-09-28 10:21:45 +01:00
ecryptfs_kernel.h ecryptfs: get rid of ecryptfs_set_dentry_lower{,_mnt} 2013-10-24 23:34:48 -04:00
file.c ecryptfs: don't allow mmap when the lower fs doesn't support it 2016-08-22 22:38:26 +01:00
inode.c ecryptfs: avoid to access NULL pointer when write metadata in xattr 2014-10-30 09:40:18 -07:00
Kconfig Minor code cleanups and new Kconfig option to disable /dev/ecryptfs 2013-03-07 12:47:24 -08:00
keystore.c ecryptfs: Fix memory leakage in keystore.c 2013-10-16 15:18:01 -07:00
kthread.c eCryptfs: fix to use list_for_each_entry_safe() when delete items 2012-12-18 10:07:29 -06:00
main.c fs: limit filesystem stacking depth 2016-08-22 22:38:27 +01:00
Makefile eCryptfs: allow userspace messaging to be disabled 2013-03-03 23:59:59 -08:00
messaging.c eCryptfs: Cocci spatch "memdup.spatch" 2013-06-07 17:26:55 -07:00
miscdev.c ecryptfs: close rmmod race 2013-04-09 14:08:16 -04:00
mmap.c eCryptfs: Avoid unnecessary disk read and data decryption during writing 2012-11-07 17:56:16 -08:00
read_write.c ecryptfs: don't open-code kernel_read() 2013-05-09 13:39:58 -04:00
super.c mm + fs: store shadow entries in page cache 2014-04-03 16:21:01 -07:00