diff --git a/fix-bounce_end_io.patch b/fix-bounce_end_io.patch
new file mode 100644
index 0000000..5a61ca6
--- /dev/null
+++ b/fix-bounce_end_io.patch
@@ -0,0 +1,42 @@
+From 08df0db0be41e6bea306bcf5b4d325f5a79dc7a1 Mon Sep 17 00:00:00 2001
+From: Ming Lei <ming.lei@canonical.com>
+Date: Sat, 12 Sep 2015 20:48:42 +0800
+Subject: [PATCH] block: fix bounce_end_io
+
+When bio bounce is involved, one new bio and its io vector are
+cloned from the coming bio, which can be one fast-cloned bio
+and its io vector can be shared with another bio too, especially
+after bio_split() is introduced.
+
+So it is obviously wrong to assume the start index of the original
+bio's io vector is zero, which can be any value between 0 and
+(bi_max_vecs - 1), especially in case of bio split.
+
+Signed-off-by: Ming Lei <ming.lei@canonical.com>
+---
+ block/bounce.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/block/bounce.c b/block/bounce.c
+index 0611aea1cfe9..1cb5dd3a5da1 100644
+--- a/block/bounce.c
++++ b/block/bounce.c
+@@ -128,12 +128,14 @@ static void bounce_end_io(struct bio *bio, mempool_t *pool)
+ 	struct bio *bio_orig = bio->bi_private;
+ 	struct bio_vec *bvec, *org_vec;
+ 	int i;
++	int start = bio_orig->bi_iter.bi_idx;
+ 
+ 	/*
+ 	 * free up bounce indirect pages used
+ 	 */
+ 	bio_for_each_segment_all(bvec, bio, i) {
+-		org_vec = bio_orig->bi_io_vec + i;
++		org_vec = bio_orig->bi_io_vec + i + start;
++
+ 		if (bvec->bv_page == org_vec->bv_page)
+ 			continue;
+ 
+-- 
+2.4.3
+
diff --git a/kernel.spec b/kernel.spec
index 459e4ee..476167c 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -67,7 +67,7 @@ Summary: The Linux kernel
 # The rc snapshot level
 %define rcrev 1
 # The git snapshot level
-%define gitrev 1
+%define gitrev 2
 # Set rpm version accordingly
 %define rpmversion 4.%{upstream_sublevel}.0
 %endif
@@ -594,6 +594,8 @@ Patch521: x86-alternatives-Make-optimize_nops-interrupt-safe-a.patch
 #rhbz 1237136
 Patch522: block-blkg_destroy_all-should-clear-q-root_blkg-and-.patch
 
+Patch523: fix-bounce_end_io.patch
+
 Patch904: kdbus.patch
 
 # END OF PATCH DEFINITIONS
@@ -2039,6 +2041,9 @@ fi
 #
 # 
 %changelog
+* Wed Sep 16 2015 Laura Abbott <labbott@redhat.com> - 4.3.0-0.rc1.git2.1
+- Linux v4.3-rc1-21-g865ca08
+
 * Tue Sep 15 2015 Josh Boyer <jwboyer@fedoraproject.org> - 4.3.0-0.rc1.git1.1
 - Linux v4.3-rc1-19-gd25ed277fbd4
 
diff --git a/sources b/sources
index f5b38f5..a972a5c 100644
--- a/sources
+++ b/sources
@@ -1,4 +1,4 @@
 3d5ea06d767e2f35c999eeadafc76523  linux-4.2.tar.xz
 4c964bfba54d65b5b54cc898baddecad  perf-man-4.2.tar.gz
 45904fd88e2d6f79693abcce148a12fe  patch-4.3-rc1.xz
-b1923ca84c3582207a3aadb461abcfb0  patch-4.3-rc1-git1.xz
+6a7a5f6a5a8370b9348da0757d23abd7  patch-4.3-rc1-git2.xz