+ lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-5.patch added to mm-unstable branch

+ lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-5.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: alloc_tag: Tighten file permissions on /proc/allocinfo
has been added to the -mm mm-unstable branch.  Its filename is
     lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-5.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-5.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Kees Cook <keescook@chromium.org>
Subject: alloc_tag: Tighten file permissions on /proc/allocinfo
Date: Thu, 25 Apr 2024 13:08:50 -0700

The /proc/allocinfo file exposes a tremendous about of information about
kernel build details, memory allocations (obviously), and potentially even
image layout (due to ordering).  As this is intended to be consumed by
system owners (like /proc/slabinfo), use the same file permissions as
there: 0400.

Link: https://lkml.kernel.org/r/20240425200844.work.184-kees@kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/alloc_tag.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/alloc_tag.c~lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-5
+++ a/lib/alloc_tag.c
@@ -90,7 +90,7 @@ static const struct seq_operations alloc
 
 static void __init procfs_init(void)
 {
-	proc_create_seq("allocinfo", 0444, NULL, &allocinfo_seq_op);
+	proc_create_seq("allocinfo", 0400, NULL, &allocinfo_seq_op);
 }
 
 static bool alloc_tag_module_unload(struct codetag_type *cttype,
_

Patches currently in -mm which might be from keescook@chromium.org are

lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-5.patch