proc: move "struct pde_opener" to kmem cache

"struct pde_opener" is fixed size and we can have more granular approach
to debugging.

For those who don't know, per cache SLUB poisoning and red zoning don't
work if there is at least one object allocated which is hopeless in case
of kmalloc-64 but not in case of standalone cache.  Although systemd
opens 2 files from the get go, so it is hopeless after all.

Link: http://lkml.kernel.org/r/20180214082306.GB17157@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This commit is contained in:

Alexey Dobriyan

2018-04-10 16:31:09 -07:00

committed by

Linus Torvalds

parent a9fabc3df4

commit 195b8cf068

3 changed files with 10 additions and 6 deletions

									
										fs/proc/root.c
									
		+1
		-1
	
												View File
												
				@@ -125,7 +125,7 @@ void __init proc_root_init(void)

				{

					int err;

					proc_init_inodecache();

					proc_init_kmemcache();

					set_proc_pid_nlink();

					err = register_filesystem(&proc_fs_type);

					if (err)