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| author |   Todd Kjos <tkjos@google.com> | 2020-11-20 15:37:43 -0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-09 15:41:21 +0100 |
| commit | 0f966cba95c78029f491b433ea95ff38f414a761 (patch) | |
| tree | 1cf9aeed5b3ffbf4a82d61f6be3e8a10055ef914 /drivers/android/binder.c | |
| parent | speakup: fix uninitialized flush_lock (diff) | |
| download | linux-dev-0f966cba95c78029f491b433ea95ff38f414a761.tar.xz linux-dev-0f966cba95c78029f491b433ea95ff38f414a761.zip | |
binder: add flag to clear buffer on txn complete
Add a per-transaction flag to indicate that the buffer
must be cleared when the transaction is complete to
prevent copies of sensitive data from being preserved
in memory.
Signed-off-by: Todd Kjos <tkjos@google.com>
Link: https://lore.kernel.org/r/20201120233743.3617529-1-tkjos@google.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/android/binder.c')
| -rw-r--r-- | drivers/android/binder.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c index 20b08f52e788..1338209f9f86 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -2756,6 +2756,7 @@ static void binder_transaction(struct binder_proc *proc, t->buffer->debug_id = t->debug_id; t->buffer->transaction = t; t->buffer->target_node = target_node; + t->buffer->clear_on_free = !!(t->flags & TF_CLEAR_BUF); trace_binder_transaction_alloc_buf(t->buffer); if (binder_alloc_copy_user_to_buffer( |