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binder: fix max_thread type inconsistency

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commit 4231694133 upstream.

The type defined for the BINDER_SET_MAX_THREADS ioctl was changed from
size_t to __u32 in order to avoid incompatibility issues between 32 and
64-bit kernels. However, the internal types used to copy from user and
store the value were never updated. Use u32 to fix the inconsistency.

Fixes: a9350fc859 ("staging: android: binder: fix BINDER_SET_MAX_THREADS declaration")
Reported-by: Arve Hjønnevåg <arve@android.com>
Cc: stable@vger.kernel.org
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20240421173750.3117808-1-cmllamas@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Carlos Llamas
2024-04-21 17:37:49 +00:00
committed by Greg Kroah-Hartman
parent a4ffa8b2fc
commit e55b4d9383
2 changed files with 2 additions and 2 deletions
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2
drivers/android/binder.c
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@@ -5367,7 +5367,7 @@ static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
goto err;
break;
case BINDER_SET_MAX_THREADS: {
int max_threads;
u32 max_threads;
if (copy_from_user(&max_threads, ubuf,
sizeof(max_threads))) {

2
drivers/android/binder_internal.h
View File

@@ -421,7 +421,7 @@ struct binder_proc {
struct list_head todo;
struct binder_stats stats;
struct list_head delivered_death;
int max_threads;
u32 max_threads;
int requested_threads;
int requested_threads_started;
int tmp_ref;