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| author | Kees Cook <keescook@chromium.org> | 2024-04-25 23:08:50 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-04-26 06:55:59 +0300 |
| commit | e13106952faad91c6e492bf23b7cbdf1b1c269ce (patch) | |
| tree | 8d16261343e213ee7e0a9c2acdc0d3978b31863d | |
| parent | 2c321f3f70bc284510598f712b702ce8d60c4d14 (diff) | |
| download | linux-e13106952faad91c6e492bf23b7cbdf1b1c269ce.tar.xz | |
alloc_tag: Tighten file permissions on /proc/allocinfo
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>
| -rw-r--r-- | lib/alloc_tag.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/alloc_tag.c b/lib/alloc_tag.c index 26af9982ddc4..531dbe2f5456 100644 --- a/lib/alloc_tag.c +++ b/lib/alloc_tag.c @@ -129,7 +129,7 @@ size_t alloc_tag_top_users(struct codetag_bytes *tags, size_t count, bool can_sl 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, |