FAILED: patch "[PATCH] libceph: initialize CRUSH choose argument weights" failed to apply to 5.15-stable tree

FAILED: patch "[PATCH] libceph: initialize CRUSH choose argument weights" failed to apply to 5.15-stable tree

[Sasha Levin]

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x c3a995ff0782587789333c621e1f6bd5e574371e
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '20261107061213-failed-5.15-c3a995ff0782@kernel.org' --subject-prefix 'PATCH 5.15.y' 'HEAD^..'

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

From c3a995ff0782587789333c621e1f6bd5e574371e Mon Sep 17 00:00:00 2001
From: Darong Lu <zzyy19904204639@163.com>
Date: Mon, 28 Sep 2026 01:44:22 +0800
Subject: [PATCH] libceph: initialize CRUSH choose argument weights

Initialize the CRUSH choose argument weight-set array before decoding so
entries start in a defined state while the decoder fills them.

Cc: stable@vger.kernel.org
Fixes: 5cf9c4a9959b ("libceph, crush: per-pool crush_choose_arg_map for crush_do_rule()")
Reported-by: Vega <vega@nebusec.ai>
Assisted-by: LLM
Signed-off-by: Darong Lu <zzyy19904204639@163.com>
Signed-off-by: Ren Wei <weir@nebusec.ai>
Reviewed-by: Alex Markuze <amarkuze@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
 net/ceph/osdmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index 7d65a81148166..e69a2249ddfbf 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -319,7 +319,7 @@ static int decode_choose_arg(void **p, void *end, struct crush_choose_arg *arg)
 	if (arg->weight_set_size) {
 		u32 i;
 
-		arg->weight_set = kmalloc_objs(*arg->weight_set,
+		arg->weight_set = kzalloc_objs(*arg->weight_set,
 					       arg->weight_set_size, GFP_NOIO);
 		if (!arg->weight_set)
 			return -ENOMEM;
-- 
2.53.0

[PATCH 5.15.y] libceph: initialize CRUSH choose argument weights

[Sasha Levin]

From: Darong Lu <zzyy19904204639@163.com>

[ Upstream commit c3a995ff0782587789333c621e1f6bd5e574371e ]

Initialize the CRUSH choose argument weight-set array before decoding so
entries start in a defined state while the decoder fills them.

Cc: stable@vger.kernel.org
Fixes: 5cf9c4a9959b ("libceph, crush: per-pool crush_choose_arg_map for crush_do_rule()")
Reported-by: Vega <vega@nebusec.ai>
Assisted-by: LLM
Signed-off-by: Darong Lu <zzyy19904204639@163.com>
Signed-off-by: Ren Wei <weir@nebusec.ai>
Reviewed-by: Alex Markuze <amarkuze@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
[ sashal: Adapted kzalloc_objs() to kcalloc() with an explicit element size. ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/ceph/osdmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index af8b6c01784ec..4fab2aa5789c0 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -304,7 +304,7 @@ static int decode_choose_arg(void **p, void *end, struct crush_choose_arg *arg)
 	if (arg->weight_set_size) {
 		u32 i;
 
-		arg->weight_set = kmalloc_array(arg->weight_set_size,
+		arg->weight_set = kcalloc(arg->weight_set_size,
 						sizeof(*arg->weight_set),
 						GFP_NOIO);
 		if (!arg->weight_set)
-- 
2.53.0