From: Thomas Huth <thuth@redhat.com>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: QEMU Developers <qemu-devel@nongnu.org>
Subject: [Qemu-devel] Something wrong in usb_try_create_simple()
Date: Wed, 27 Sep 2017 13:38:04 +0200 [thread overview]
Message-ID: <70a6ee09-f482-58f9-dded-2fa90bdab90e@redhat.com> (raw)
Hi Gerd,
today, I've run into this issue reported by valgrind:
$ valgrind x86_64-softmmu/qemu-system-x86_64 -device usb-ehci -nographic -S
==2043== Memcheck, a memory error detector
==2043== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==2043== Using Valgrind-3.12.0 and LibVEX; rerun with -h for copyright info
==2043== Command: x86_64-softmmu/qemu-system-x86_64 -device usb-ehci -nographic -S
==2043==
QEMU 2.10.50 monitor - type 'help' for more information
(qemu) device_add usb-tablet
(qemu) device_add usb-tablet
(qemu) device_add usb-tablet
(qemu) device_add usb-tablet
(qemu) device_add usb-tablet
(qemu) device_add usb-tablet
==2043== Invalid read of size 8
==2043== at 0x60EF50: object_unparent (object.c:445)
==2043== by 0x580F0D: usb_try_create_simple (bus.c:346)
==2043== by 0x581BEB: usb_claim_port (bus.c:451)
==2043== by 0x582310: usb_qdev_realize (bus.c:257)
==2043== by 0x4CB399: device_set_realized (qdev.c:914)
==2043== by 0x60E26D: property_set_bool (object.c:1886)
==2043== by 0x61235E: object_property_set_qobject (qom-qobject.c:27)
==2043== by 0x61000F: object_property_set_bool (object.c:1162)
==2043== by 0x4567C3: qdev_device_add (qdev-monitor.c:630)
==2043== by 0x456D52: qmp_device_add (qdev-monitor.c:807)
==2043== by 0x470A99: hmp_device_add (hmp.c:1933)
==2043== by 0x3679C3: handle_hmp_command (monitor.c:3123)
==2043== Address 0x2100b430 is 32 bytes inside a block of size 6,448 free'd
==2043== at 0x4C2ACDD: free (vg_replace_malloc.c:530)
==2043== by 0xA04EBCD: g_free (in /usr/lib64/libglib-2.0.so.0.5000.3)
==2043== by 0x60F735: object_finalize (object.c:471)
==2043== by 0x60F735: object_unref (object.c:902)
==2043== by 0x60E746: object_property_del_child.isra.7 (object.c:427)
==2043== by 0x4CB2B2: device_set_realized (qdev.c:994)
==2043== by 0x60E26D: property_set_bool (object.c:1886)
==2043== by 0x61235E: object_property_set_qobject (qom-qobject.c:27)
==2043== by 0x61000F: object_property_set_bool (object.c:1162)
==2043== by 0x580EBB: usb_try_create_simple (bus.c:341)
==2043== by 0x581BEB: usb_claim_port (bus.c:451)
==2043== by 0x582310: usb_qdev_realize (bus.c:257)
==2043== by 0x4CB399: device_set_realized (qdev.c:914)
==2043== Block was alloc'd at
==2043== at 0x4C29BE3: malloc (vg_replace_malloc.c:299)
==2043== by 0xA04EABD: g_malloc (in /usr/lib64/libglib-2.0.so.0.5000.3)
==2043== by 0x60EE0C: object_new_with_type (object.c:482)
==2043== by 0x4CA080: qdev_try_create (qdev.c:152)
==2043== by 0x580E7A: usb_try_create_simple (bus.c:336)
==2043== by 0x581BEB: usb_claim_port (bus.c:451)
==2043== by 0x582310: usb_qdev_realize (bus.c:257)
==2043== by 0x4CB399: device_set_realized (qdev.c:914)
==2043== by 0x60E26D: property_set_bool (object.c:1886)
==2043== by 0x61235E: object_property_set_qobject (qom-qobject.c:27)
==2043== by 0x61000F: object_property_set_bool (object.c:1162)
==2043== by 0x4567C3: qdev_device_add (qdev-monitor.c:630)
Any idea what could be wrong here?
Thomas
next reply other threads:[~2017-09-27 11:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-27 11:38 Thomas Huth [this message]
2017-09-27 13:25 ` [Qemu-devel] Something wrong in usb_try_create_simple() Paolo Bonzini
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