From: Alan Stern <stern@rowland.harvard.edu>
To: syzbot <syzbot+ec5f884c4a135aa0dbb9@syzkaller.appspotmail.com>
Cc: andreyknvl@google.com, <benjamin.tissoires@redhat.com>,
<jikos@kernel.org>, <linux-input@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-usb@vger.kernel.org>,
<syzkaller-bugs@googlegroups.com>
Subject: Re: INFO: rcu detected stall in hub_event
Date: Mon, 25 Nov 2019 16:24:05 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.44L0.1911251622420.1565-100000@iolanthe.rowland.org> (raw)
In-Reply-To: <00000000000003b7c305982885e3@google.com>
#syz test: https://github.com/google/kasan.git 46178223
Index: usb-devel/drivers/hid/hid-core.c
===================================================================
--- usb-devel.orig/drivers/hid/hid-core.c
+++ usb-devel/drivers/hid/hid-core.c
@@ -1057,6 +1057,8 @@ static void hid_apply_multiplier(struct
while (multiplier_collection->parent_idx != -1 &&
multiplier_collection->type != HID_COLLECTION_LOGICAL)
multiplier_collection = &hid->collection[multiplier_collection->parent_idx];
+ if (multiplier_collection->type != HID_COLLECTION_LOGICAL)
+ multiplier_collection = NULL;
effective_multiplier = hid_calculate_multiplier(hid, multiplier);
@@ -1191,6 +1193,9 @@ int hid_open_report(struct hid_device *d
}
device->collection_size = HID_DEFAULT_NUM_COLLECTIONS;
+ /* Needed for usages before the first collection */
+ device->collection[0].parent_idx = -1;
+
ret = -EINVAL;
while ((start = fetch_item(start, end, &item)) != NULL) {
next prev parent reply other threads:[~2019-11-25 21:24 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-21 14:45 INFO: rcu detected stall in hub_event syzbot
2019-11-22 16:51 ` Alan Stern
2019-11-22 21:31 ` Andrey Konovalov
2019-11-25 17:30 ` Alan Stern
2019-12-09 18:26 ` Alan Stern
2019-12-10 21:26 ` [PATCH] HID: Fix slab-out-of-bounds read in hid_field_extract Alan Stern
2019-12-11 14:18 ` Jiri Kosina
2019-12-11 15:10 ` Alan Stern
2019-12-13 8:44 ` Jiri Kosina
2024-04-08 16:55 ` INFO: rcu detected stall in hub_event Alan Stern
2019-11-23 20:20 ` syzbot
2019-11-24 16:17 ` Alan Stern
2019-11-25 9:38 ` syzbot
2019-11-25 21:24 ` Alan Stern [this message]
2019-11-26 7:48 ` Jiri Kosina
2019-11-26 15:18 ` Alan Stern
2019-11-26 20:21 ` syzbot
2022-07-30 10:27 ` [syzbot] " syzbot
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