4.19-stable patches

added patches:
	binder-fix-async-space-check-for-0-sized-buffers.patch

diff --git a/queue-4.19/binder-fix-async-space-check-for-0-sized-buffers.patch b/queue-4.19/binder-fix-async-space-check-for-0-sized-buffers.patch
new file mode 100644 (file)
index 0000000..ccd9e00
--- /dev/null
+++ b/queue-4.19/binder-fix-async-space-check-for-0-sized-buffers.patch
@@ -0,0 +1,44 @@
+From 3091c21d3e9322428691ce0b7a0cfa9c0b239eeb Mon Sep 17 00:00:00 2001
+From: Carlos Llamas <cmllamas@google.com>
+Date: Fri, 1 Dec 2023 17:21:33 +0000
+Subject: binder: fix async space check for 0-sized buffers
+
+From: Carlos Llamas <cmllamas@google.com>
+
+commit 3091c21d3e9322428691ce0b7a0cfa9c0b239eeb upstream.
+
+Move the padding of 0-sized buffers to an earlier stage to account for
+this round up during the alloc->free_async_space check.
+
+Fixes: 74310e06be4d ("android: binder: Move buffer out of area shared with user space")
+Reviewed-by: Alice Ryhl <aliceryhl@google.com>
+Signed-off-by: Carlos Llamas <cmllamas@google.com>
+Link: https://lore.kernel.org/r/20231201172212.1813387-5-cmllamas@google.com
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/android/binder_alloc.c |    7 ++++---
+ 1 file changed, 4 insertions(+), 3 deletions(-)
+
+--- a/drivers/android/binder_alloc.c
++++ b/drivers/android/binder_alloc.c
+@@ -398,6 +398,10 @@ static struct binder_buffer *binder_allo
+                               alloc->pid, extra_buffers_size);
+               return ERR_PTR(-EINVAL);
+       }
++
++      /* Pad 0-size buffers so they get assigned unique addresses */
++      size = max(size, sizeof(void *));
++
+       if (is_async &&
+           alloc->free_async_space < size + sizeof(struct binder_buffer)) {
+               binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
+@@ -406,9 +410,6 @@ static struct binder_buffer *binder_allo
+               return ERR_PTR(-ENOSPC);
+       }
+ 
+-      /* Pad 0-size buffers so they get assigned unique addresses */
+-      size = max(size, sizeof(void *));
+-
+       while (n) {
+               buffer = rb_entry(n, struct binder_buffer, rb_node);
+               BUG_ON(!buffer->free);

diff --git a/queue-4.19/series b/queue-4.19/series
index fba6603d0ef21c79a4e8537d2482f9c85e5be9f3..05f890ef6a4a7fd34ff987919d4e9b8bbb7be54d 100644 (file)
--- a/queue-4.19/series
+++ b/queue-4.19/series
@@ -109,3 +109,4 @@ watchdog-bcm2835_wdt-fix-wdioc_settimeout-handling.patch
 mmc-sdhci_omap-fix-ti-soc-dependencies.patch
 of-fix-double-free-in-of_parse_phandle_with_args_map.patch
 of-unittest-fix-of_count_phandle_with_args-expected-.patch
+binder-fix-async-space-check-for-0-sized-buffers.patch