diff options
| author | Thorsten Blum <thorsten.blum@linux.dev> | 2026-02-28 00:00:09 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-03-10 16:01:48 -0700 |
| commit | 36f46b0e36892eba08978eef7502ff3c94ddba77 (patch) | |
| tree | 83c635b14afd852ca096392d38b64053a4c2ac87 /kernel | |
| parent | b4f0dd314b39ea154f62f3bd3115ed0470f9f71e (diff) | |
crash_dump: don't log dm-crypt key bytes in read_key_from_user_keying
When debug logging is enabled, read_key_from_user_keying() logs the first
8 bytes of the key payload and partially exposes the dm-crypt key. Stop
logging any key bytes.
Link: https://lkml.kernel.org/r/20260227230008.858641-2-thorsten.blum@linux.dev
Fixes: 479e58549b0f ("crash_dump: store dm crypt keys in kdump reserved memory")
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Cc: Baoquan He <bhe@redhat.com>
Cc: Coiby Xu <coxu@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/crash_dump_dm_crypt.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/crash_dump_dm_crypt.c b/kernel/crash_dump_dm_crypt.c index 1f4067fbdb94..a20d4097744a 100644 --- a/kernel/crash_dump_dm_crypt.c +++ b/kernel/crash_dump_dm_crypt.c @@ -168,8 +168,8 @@ static int read_key_from_user_keying(struct dm_crypt_key *dm_key) memcpy(dm_key->data, ukp->data, ukp->datalen); dm_key->key_size = ukp->datalen; - kexec_dprintk("Get dm crypt key (size=%u) %s: %8ph\n", dm_key->key_size, - dm_key->key_desc, dm_key->data); + kexec_dprintk("Get dm crypt key (size=%u) %s\n", dm_key->key_size, + dm_key->key_desc); out: up_read(&key->sem); |