The patch titled
Subject: alloc_tag: Tighten file permissions on /proc/allocinfo
has been added to the -mm mm-unstable branch. Its filename is
alloc_tag-tighten-file-permissions-on-proc-allocinfo.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/alloc_tag-tighten-file-permissions-on-proc-allocinfo.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
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~alloc_tag-tighten-file-permissions-on-proc-allocinfo
+++ a/lib/alloc_tag.c
@@ -129,7 +129,7 @@ size_t alloc_tag_top_users(struct codeta
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
alloc_tag-tighten-file-permissions-on-proc-allocinfo.patch
