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raw | patch | inline | side by side (parent: 4ddfc91)
raw | patch | inline | side by side (parent: 4ddfc91)
author | Arve Hjønnevåg <arve@android.com> | |
Mon, 6 Apr 2009 22:12:56 +0000 (15:12 -0700) | ||
committer | Greg Kroah-Hartman <gregkh@suse.de> | |
Fri, 17 Apr 2009 18:06:26 +0000 (11:06 -0700) |
Check that datasize is not smaller than one flat_binder_object.
Check that offsets are aligned.
Check that offsets_size is aligned.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Check that offsets are aligned.
Check that offsets_size is aligned.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/staging/android/binder.c | patch | blob | history |
index 761f5d6a9cf299fc1a4842309aeb0819dd9b6998..64f95ee8a70410eb9c59e49de3f8cc8673fc8104 100644 (file)
return_error = BR_FAILED_REPLY;
goto err_copy_data_failed;
}
+ if (!IS_ALIGNED(tr->offsets_size, sizeof(size_t))) {
+ binder_user_error("binder: %d:%d got transaction with "
+ "invalid offsets size, %zd\n",
+ proc->pid, thread->pid, tr->offsets_size);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_offset;
+ }
off_end = (void *)offp + tr->offsets_size;
for (; offp < off_end; offp++) {
struct flat_binder_object *fp;
- if (*offp > t->buffer->data_size - sizeof(*fp)) {
+ if (*offp > t->buffer->data_size - sizeof(*fp) ||
+ t->buffer->data_size < sizeof(*fp) ||
+ !IS_ALIGNED(*offp, sizeof(void *))) {
binder_user_error("binder: %d:%d got transaction with "
"invalid offset, %zd\n",
proc->pid, thread->pid, *offp);
@@ -1651,7 +1660,9 @@ binder_transaction_buffer_release(struct binder_proc *proc, struct binder_buffer
off_end = (void *)offp + buffer->offsets_size;
for (; offp < off_end; offp++) {
struct flat_binder_object *fp;
- if (*offp > buffer->data_size - sizeof(*fp)) {
+ if (*offp > buffer->data_size - sizeof(*fp) ||
+ buffer->data_size < sizeof(*fp) ||
+ !IS_ALIGNED(*offp, sizeof(void *))) {
printk(KERN_ERR "binder: transaction release %d bad"
"offset %zd, size %zd\n", debug_id, *offp, buffer->data_size);
continue;