1 files changed, 106 insertions, 0 deletions
diff --git a/0043-netfs-gcc-12-temporarily-disable-Wattribute-warning-.patch b/0043-netfs-gcc-12-temporarily-disable-Wattribute-warning-.patch
new file mode 100644
index 000000000000..d577472d1bba
--- /dev/null
+++ b/0043-netfs-gcc-12-temporarily-disable-Wattribute-warning-.patch
@@ -0,0 +1,106 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Linus Torvalds <torvalds@linux-foundation.org>
+Date: Thu, 9 Jun 2022 11:29:36 -0700
+Subject: [PATCH] netfs: gcc-12: temporarily disable '-Wattribute-warning' for
+ now
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+[ Upstream commit 507160f46c55913955d272ebf559d63809a8e560 ]
+
+This is a pure band-aid so that I can continue merging stuff from people
+while some of the gcc-12 fallout gets sorted out.
+
+In particular, gcc-12 is very unhappy about the kinds of pointer
+arithmetic tricks that netfs does, and that makes the fortify checks
+trigger in afs and ceph:
+
+  In function ‘fortify_memset_chk’,
+      inlined from ‘netfs_i_context_init’ at include/linux/netfs.h:327:2,
+      inlined from ‘afs_set_netfs_context’ at fs/afs/inode.c:61:2,
+      inlined from ‘afs_root_iget’ at fs/afs/inode.c:543:2:
+  include/linux/fortify-string.h:258:25: warning: call to ‘__write_overflow_field’ declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Wattribute-warning]
+    258 |                         __write_overflow_field(p_size_field, size);
+        |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+and the reason is that netfs_i_context_init() is passed a 'struct inode'
+pointer, and then it does
+
+        struct netfs_i_context *ctx = netfs_i_context(inode);
+
+        memset(ctx, 0, sizeof(*ctx));
+
+where that netfs_i_context() function just does pointer arithmetic on
+the inode pointer, knowing that the netfs_i_context is laid out
+immediately after it in memory.
+
+This is all truly disgusting, since the whole "netfs_i_context is laid
+out immediately after it in memory" is not actually remotely true in
+general, but is just made to be that way for afs and ceph.
+
+See for example fs/cifs/cifsglob.h:
+
+  struct cifsInodeInfo {
+        struct {
+                /* These must be contiguous */
+                struct inode    vfs_inode;      /* the VFS's inode record */
+                struct netfs_i_context netfs_ctx; /* Netfslib context */
+        };
+	[...]
+
+and realize that this is all entirely wrong, and the pointer arithmetic
+that netfs_i_context() is doing is also very very wrong and wouldn't
+give the right answer if netfs_ctx had different alignment rules from a
+'struct inode', for example).
+
+Anyway, that's just a long-winded way to say "the gcc-12 warning is
+actually quite reasonable, and our code happens to work but is pretty
+disgusting".
+
+This is getting fixed properly, but for now I made the mistake of
+thinking "the week right after the merge window tends to be calm for me
+as people take a breather" and I did a sustem upgrade.  And I got gcc-12
+as a result, so to continue merging fixes from people and not have the
+end result drown in warnings, I am fixing all these gcc-12 issues I hit.
+
+Including with these kinds of temporary fixes.
+
+Cc: Kees Cook <keescook@chromium.org>
+Cc: David Howells <dhowells@redhat.com>
+Link: https://lore.kernel.org/all/AEEBCF5D-8402-441D-940B-105AA718C71F@chromium.org/
+Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
+Signed-off-by: Sasha Levin <sashal@kernel.org>
+---
+ fs/afs/inode.c  | 3 +++
+ fs/ceph/inode.c | 3 +++
+ 2 files changed, 6 insertions(+)
+
+diff --git a/fs/afs/inode.c b/fs/afs/inode.c
+index 30b066299d39f70a450539823dbe75602427e81a..65b439cd53d29c78701fa62f98433f5058907166 100644
+--- a/fs/afs/inode.c
++++ b/fs/afs/inode.c
+@@ -25,6 +25,9 @@
+ #include "internal.h"
+ #include "afs_fs.h"
+ 
++// Temporary: netfs does disgusting things with inode pointers
++#pragma GCC diagnostic ignored "-Wattribute-warning"
++
+ static const struct inode_operations afs_symlink_inode_operations = {
+ 	.get_link	= page_get_link,
+ };
+diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
+index 63113e2a4890763e255048c31a0b228cdba13a22..83739dae52687d94837d2e0babb5c7852d31686f 100644
+--- a/fs/ceph/inode.c
++++ b/fs/ceph/inode.c
+@@ -20,6 +20,9 @@
+ #include "cache.h"
+ #include <linux/ceph/decode.h>
+ 
++// Temporary: netfs does disgusting things with inode pointers
++#pragma GCC diagnostic ignored "-Wattribute-warning"
++
+ /*
+  * Ceph inode operations
+  *