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@xxxxxxxxxxxx>
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@xxxxxxxxxx
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Kent Overstreet <kent.overstreet@xxxxxxxxx>
Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxxxx are
lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-5.patch
