linux-kernel - Re: [syzbot] [usb?] WARNING: ODEBUG bug in get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <672170c8.050a0220.24951d.007d.GAE@google.com>
Date: Tue, 29 Oct 2024 16:33:28 -0700
From: syzbot <syzbot+ffe5c7db7c30a0fbb165@...kaller.appspotmail.com>
To: andrew+netdev@...n.ch, andrew@...n.ch, davem@...emloft.net, 
	edumazet@...gle.com, kuba@...nel.org, linux-kernel@...r.kernel.org, 
	linux-usb@...r.kernel.org, netdev@...r.kernel.org, oneukum@...e.com, 
	pabeni@...hat.com, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [usb?] WARNING: ODEBUG bug in get_taint

syzbot has found a reproducer for the following issue on:

HEAD commit:    e42b1a9a2557 Merge tag 'spi-fix-v6.12-rc5' of git://git.ke..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16fb4540580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=59c645aba1a913f
dashboard link: https://syzkaller.appspot.com/bug?extid=ffe5c7db7c30a0fbb165
compiler:       arm-linux-gnueabi-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16f7ee40580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12953687980000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/8ead8862021c/non_bootable_disk-e42b1a9a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/58af25eb211f/vmlinux-e42b1a9a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7c1b9c1d3d1b/zImage-e42b1a9a.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ffe5c7db7c30a0fbb165@...kaller.appspotmail.com

dm9601 1-1:47.0 eth1: unregister 'dm9601' usb-dummy_hcd.0-1, Davicom DM96xx USB 10/100 Ethernet
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1781 at lib/debugobjects.c:514 debug_print_object+0xc4/0xd8 lib/debugobjects.c:514
ODEBUG: free active (active state 0) object: 8436afcc object type: work_struct hint: usbnet_deferred_kevent+0x0/0x394 drivers/net/usb/usbnet.c:633
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 UID: 0 PID: 1781 Comm: kworker/0:3 Not tainted 6.12.0-rc5-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: usb_hub_wq hub_event
Call trace: 
[<8199a4d8>] (dump_backtrace) from [<8199a5d4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:82622f44 r5:00000000 r4:8203d914
[<8199a5bc>] (show_stack) from [<819b8a70>] (__dump_stack lib/dump_stack.c:94 [inline])
[<8199a5bc>] (show_stack) from [<819b8a70>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:120)
[<819b8a1c>] (dump_stack_lvl) from [<819b8ab0>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r5:00000000 r4:82870d18
[<819b8a98>] (dump_stack) from [<8199b100>] (panic+0x120/0x374 kernel/panic.c:354)
[<8199afe0>] (panic) from [<802420e0>] (check_panic_on_warn kernel/panic.c:243 [inline])
[<8199afe0>] (panic) from [<802420e0>] (get_taint+0x0/0x1c kernel/panic.c:238)
 r3:8260c5c4 r2:00000001 r1:82025ce8 r0:8202d750
 r7:808547a0
[<8024206c>] (check_panic_on_warn) from [<80242244>] (__warn+0x80/0x188 kernel/panic.c:748)
[<802421c4>] (__warn) from [<80242534>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:783)
 r8:00000009 r7:8208ca38 r6:eb0b9a8c r5:8357b000 r4:00000000
[<80242350>] (warn_slowpath_fmt) from [<808547a0>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:514)
 r10:00000005 r9:8436a800 r8:81a01c24 r7:820b7828 r6:828dd084 r5:eb0b9b34
 r4:8260cda4
[<808546dc>] (debug_print_object) from [<80856030>] (__debug_check_no_obj_freed lib/debugobjects.c:989 [inline])
[<808546dc>] (debug_print_object) from [<80856030>] (debug_check_no_obj_freed+0x254/0x2a0 lib/debugobjects.c:1019)
 r8:8436b000 r7:8436afcc r6:00000100 r5:00000003 r4:00000000
[<80855ddc>] (debug_check_no_obj_freed) from [<804c91c4>] (slab_free_hook mm/slub.c:2273 [inline])
[<80855ddc>] (debug_check_no_obj_freed) from [<804c91c4>] (slab_free mm/slub.c:4579 [inline])
[<80855ddc>] (debug_check_no_obj_freed) from [<804c91c4>] (kfree+0x190/0x394 mm/slub.c:4727)
 r10:8277dc60 r9:844b0c80 r8:8436a800 r7:8046d198 r6:82c023c0 r5:dde90aa0
 r4:8436a800
[<804c9034>] (kfree) from [<8046d198>] (kvfree+0x2c/0x30 mm/util.c:701)
 r10:8277dc60 r9:844b0c80 r8:8436a800 r7:00000000 r6:845e6200 r5:84745e80
 r4:8436a800
[<8046d16c>] (kvfree) from [<814fc658>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2034)
 r5:84745e80 r4:8436a800
[<814fc62c>] (netdev_release) from [<80aa3b24>] (device_release+0x38/0xa8 drivers/base/core.c:2575)
 r5:84745e80 r4:8436abc0
[<80aa3aec>] (device_release) from [<8197432c>] (kobject_cleanup lib/kobject.c:689 [inline])
[<80aa3aec>] (device_release) from [<8197432c>] (kobject_release lib/kobject.c:720 [inline])
[<80aa3aec>] (device_release) from [<8197432c>] (kref_put include/linux/kref.h:65 [inline])
[<80aa3aec>] (device_release) from [<8197432c>] (kobject_put+0xa0/0x1f4 lib/kobject.c:737)
 r5:81b4c9c4 r4:8436abc0
[<8197428c>] (kobject_put) from [<80aa3d50>] (put_device+0x18/0x1c drivers/base/core.c:3783)
 r7:844b3800 r6:00000000 r5:8436a800 r4:00000000
[<80aa3d38>] (put_device) from [<814b0d24>] (free_netdev+0x134/0x1ac net/core/dev.c:11255)
[<814b0bf0>] (free_netdev) from [<80d88104>] (usbnet_disconnect+0xb8/0xfc drivers/net/usb/usbnet.c:1652)
 r6:8436af94 r5:8436ae80 r4:00000000
[<80d8804c>] (usbnet_disconnect) from [<80df0930>] (usb_unbind_interface+0x84/0x2c4 drivers/usb/core/driver.c:461)
 r8:00000044 r7:844b3830 r6:8277dc60 r5:00000000 r4:844b3800
[<80df08ac>] (usb_unbind_interface) from [<80aabc14>] (device_remove drivers/base/dd.c:569 [inline])
[<80df08ac>] (usb_unbind_interface) from [<80aabc14>] (device_remove+0x64/0x6c drivers/base/dd.c:561)
 r10:00000000 r9:844b0c80 r8:00000044 r7:844b3874 r6:8277dc60 r5:00000000
 r4:844b3830
[<80aabbb0>] (device_remove) from [<80aad100>] (__device_release_driver drivers/base/dd.c:1273 [inline])
[<80aabbb0>] (device_remove) from [<80aad100>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1296)
 r5:00000000 r4:844b3830
[<80aacf74>] (device_release_driver_internal) from [<80aad18c>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1319)
 r9:844b0c80 r8:83410140 r7:83410138 r6:8341010c r5:844b3830 r4:83410130
[<80aad174>] (device_release_driver) from [<80aab270>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:576)
[<80aab1a4>] (bus_remove_device) from [<80aa55ac>] (device_del+0x148/0x38c drivers/base/core.c:3864)
 r9:844b0c80 r8:8357b000 r7:04208060 r6:00000000 r5:844b3830 r4:844b3874
[<80aa5464>] (device_del) from [<80dee34c>] (usb_disable_device+0xdc/0x1f0 drivers/usb/core/message.c:1418)
 r10:00000000 r9:00000000 r8:844b3800 r7:844b0c00 r6:842e7a48 r5:00000002
 r4:00000070
[<80dee270>] (usb_disable_device) from [<80de31b0>] (usb_disconnect+0xec/0x29c drivers/usb/core/hub.c:2304)
 r10:00000001 r9:8450a000 r8:844b0cc4 r7:83d3a800 r6:844b0c80 r5:844b0c00
 r4:60000013
[<80de30c4>] (usb_disconnect) from [<80de5e60>] (hub_port_connect drivers/usb/core/hub.c:5361 [inline])
[<80de30c4>] (usb_disconnect) from [<80de5e60>] (hub_port_connect_change drivers/usb/core/hub.c:5661 [inline])
[<80de30c4>] (usb_disconnect) from [<80de5e60>] (port_event drivers/usb/core/hub.c:5821 [inline])
[<80de30c4>] (usb_disconnect) from [<80de5e60>] (hub_event+0xe78/0x194c drivers/usb/core/hub.c:5903)
 r10:00000001 r9:00000100 r8:83c7f100 r7:844b0c00 r6:83d3a000 r5:83d3aa10
 r4:00000001
[<80de4fe8>] (hub_event) from [<80266034>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3229)
 r10:82fd8405 r9:8357b000 r8:00800000 r7:dddd00c0 r6:82fd8400 r5:83c7f100
 r4:83e18e00
[<80265e80>] (process_one_work) from [<80266c18>] (process_scheduled_works kernel/workqueue.c:3310 [inline])
[<80265e80>] (process_one_work) from [<80266c18>] (worker_thread+0x1ec/0x3bc kernel/workqueue.c:3391)
 r10:8357b000 r9:83e18e2c r8:61c88647 r7:dddd00e0 r6:82604d40 r5:dddd00c0
 r4:83e18e00
[<80266a2c>] (worker_thread) from [<8026fc94>] (kthread+0x104/0x134 kernel/kthread.c:389)
 r10:00000000 r9:df839e78 r8:83e16fc0 r7:83e18e00 r6:80266a2c r5:8357b000
 r4:83e16f40
[<8026fb90>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137)
Exception stack(0xeb0b9fb0 to 0xeb0b9ff8)
9fa0:                                     00000000 00000000 00000000 00000000
9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026fb90 r4:83e16f40
Rebooting in 86400 seconds..


---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.