Subject: [wrecked] anon_inodefs-forbid-open-via-proc.patch removed from -mm tree
To: oleg@xxxxxxxxxx,luto@xxxxxxxxxxxxxx,mm-commits@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 11 Nov 2013 10:42:28 -0800
The patch titled
Subject: anon_inodefs: forbid open via /proc
has been removed from the -mm tree. Its filename was
anon_inodefs-forbid-open-via-proc.patch
This patch was dropped because other changes were merged, which wrecked this patch
------------------------------------------------------
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Subject: anon_inodefs: forbid open via /proc
open("/proc/pid/$anon-fd") should fail, we can't create the new file with
correct f_op/etc correctly. Currently this creates the bogus file with
the empty anon_inode_fops, this is harmless but still wrong and
misleading.
Add anon_inode_fops->anon_open() which simply returns ENXIO like
sock_no_open() does in this case.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/anon_inodes.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff -puN fs/anon_inodes.c~anon_inodefs-forbid-open-via-proc fs/anon_inodes.c
--- a/fs/anon_inodes.c~anon_inodefs-forbid-open-via-proc
+++ a/fs/anon_inodes.c
@@ -24,7 +24,15 @@
static struct vfsmount *anon_inode_mnt __read_mostly;
static struct inode *anon_inode_inode;
-static const struct file_operations anon_inode_fops;
+
+static int anon_open(struct inode *inode, struct file *file)
+{
+ return -ENXIO;
+}
+
+static const struct file_operations anon_inode_fops = {
+ .open = anon_open,
+};
/*
* anon_inodefs_dname() is called from d_path().
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
kthread-make-kthread_create-killable.patch
exec-ptrace-fix-get_dumpable-incorrect-tests.patch
linux-next.patch
mm-avoid-increase-sizeofstruct-page-due-to-split-page-table-lock.patch
mm-rename-use_split_ptlocks-to-use_split_pte_ptlocks.patch
mm-convert-mm-nr_ptes-to-atomic_long_t.patch
mm-introduce-api-for-split-page-table-lock-for-pmd-level.patch
mm-thp-change-pmd_trans_huge_lock-to-return-taken-lock.patch
mm-thp-move-ptl-taking-inside-page_check_address_pmd.patch
mm-thp-do-not-access-mm-pmd_huge_pte-directly.patch
mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock.patch
mm-convert-the-rest-to-new-page-table-lock-api.patch
mm-implement-split-page-table-lock-for-pmd-level.patch
x86-mm-enable-split-page-table-lock-for-pmd-level.patch
autofs4-allow-autofs-to-work-outside-the-initial-pid-namespace.patch
autofs4-translate-pids-to-the-right-namespace-for-the-daemon.patch
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