Message-ID: <000000000000869803061fb207d1@google.com>
Date: Wed, 14 Aug 2024 22:22:31 -0700
From: syzbot <syzbot+ffe5c7db7c30a0fbb165@...kaller.appspotmail.com>
To: 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: [syzbot] [net?] [usb?] WARNING: ODEBUG bug in get_taint

Hello,

syzbot found the following issue on:

HEAD commit:    d07b43284ab3 Merge tag 'for-linus' of git://git.kernel.org..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11a20ad5980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=27ce3a8f7447229f
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

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/8ead8862021c/non_bootable_disk-d07b4328.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/79ba6ea858b2/vmlinux-d07b4328.xz
kernel image: https://storage.googleapis.com/syzbot-assets/64a75a9460ef/zImage-d07b4328.xz

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

asix 1-1:0.0 eth1: register 'asix' at usb-dummy_hcd.0-1, ASIX AX88178 USB 2.0 Ethernet, 02:0d:96:66:af:53
usb 1-1: USB disconnect, device number 4
asix 1-1:0.0 eth1: unregister 'asix' usb-dummy_hcd.0-1, ASIX AX88178 USB 2.0 Ethernet
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3790 at lib/debugobjects.c:515 debug_print_object+0xc4/0xd8 lib/debugobjects.c:515
ODEBUG: free active (active state 0) object: 84babfcc object type: work_struct hint: usbnet_deferred_kevent+0x0/0x388 drivers/net/usb/usbnet.c:630
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 UID: 0 PID: 3790 Comm: kworker/1:4 Not tainted 6.11.0-rc3-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: usb_hub_wq hub_event
Call trace: 
[<81954e48>] (dump_backtrace) from [<81954f44>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:826228c4 r5:00000000 r4:8200bc94
[<81954f2c>] (show_stack) from [<81972c18>] (__dump_stack lib/dump_stack.c:93 [inline])
[<81954f2c>] (show_stack) from [<81972c18>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:119)
[<81972bc4>] (dump_stack_lvl) from [<81972c58>] (dump_stack+0x18/0x1c lib/dump_stack.c:128)
 r5:00000000 r4:8286bd18
[<81972c40>] (dump_stack) from [<819559ec>] (panic+0x120/0x358 kernel/panic.c:348)
[<819558cc>] (panic) from [<80242204>] (check_panic_on_warn kernel/panic.c:241 [inline])
[<819558cc>] (panic) from [<80242204>] (get_taint+0x0/0x1c kernel/panic.c:236)
 r3:8260c5c4 r2:00000001 r1:81ff44b8 r0:81ffc290
 r7:808269c4
[<80242190>] (check_panic_on_warn) from [<80242358>] (__warn+0x7c/0x180 kernel/panic.c:735)
[<802422dc>] (__warn) from [<80242644>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:768)
 r8:00000009 r7:8205a9ac r6:dfdada8c r5:840eb000 r4:00000000
[<80242460>] (warn_slowpath_fmt) from [<808269c4>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:515)
 r10:00000005 r9:84bab800 r8:81a01c24 r7:82084f34 r6:828cf69c r5:dfdadb34
 r4:8260cda4
[<80826900>] (debug_print_object) from [<80828264>] (__debug_check_no_obj_freed lib/debugobjects.c:990 [inline])
[<80826900>] (debug_print_object) from [<80828264>] (debug_check_no_obj_freed+0x254/0x2a0 lib/debugobjects.c:1020)
 r8:84bac000 r7:84babfcc r6:00000100 r5:00000003 r4:00000000
[<80828010>] (debug_check_no_obj_freed) from [<804bc624>] (slab_free_hook mm/slub.c:2219 [inline])
[<80828010>] (debug_check_no_obj_freed) from [<804bc624>] (slab_free mm/slub.c:4473 [inline])
[<80828010>] (debug_check_no_obj_freed) from [<804bc624>] (kfree+0x198/0x338 mm/slub.c:4594)
 r10:82777c18 r9:849a7480 r8:84bab800 r7:80461638 r6:82c023c0 r5:ddea33a0
 r4:84bab800
[<804bc48c>] (kfree) from [<80461638>] (kvfree+0x2c/0x30 mm/util.c:696)
 r10:82777c18 r9:849a7480 r8:84bab800 r7:00000000 r6:8503a5c0 r5:85081f80
 r4:84bab800
[<8046160c>] (kvfree) from [<814bdc9c>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2031)
 r5:85081f80 r4:84bab800
[<814bdc70>] (netdev_release) from [<80a6d5c8>] (device_release+0x38/0xa8 drivers/base/core.c:2582)
 r5:85081f80 r4:84babbc0
[<80a6d590>] (device_release) from [<8192ecd0>] (kobject_cleanup lib/kobject.c:689 [inline])
[<80a6d590>] (device_release) from [<8192ecd0>] (kobject_release lib/kobject.c:720 [inline])
[<80a6d590>] (device_release) from [<8192ecd0>] (kref_put include/linux/kref.h:65 [inline])
[<80a6d590>] (device_release) from [<8192ecd0>] (kobject_put+0xc8/0x1f8 lib/kobject.c:737)
 r5:81b4b6cc r4:84babbc0
[<8192ec08>] (kobject_put) from [<80a6d7f4>] (put_device+0x18/0x1c drivers/base/core.c:3790)
 r7:849a4000 r6:84bab90c r5:84bab800 r4:00000000
[<80a6d7dc>] (put_device) from [<81472c04>] (free_netdev+0x114/0x18c net/core/dev.c:11197)
[<81472af0>] (free_netdev) from [<80d4ef68>] (usbnet_disconnect+0xac/0xf0 drivers/net/usb/usbnet.c:1636)
 r6:84babf94 r5:84babe80 r4:00000000
[<80d4eebc>] (usbnet_disconnect) from [<80db6c88>] (usb_unbind_interface+0x84/0x2c4 drivers/usb/core/driver.c:461)
 r8:00000044 r7:849a4030 r6:82777c18 r5:00000000 r4:849a4000
[<80db6c04>] (usb_unbind_interface) from [<80a756cc>] (device_remove drivers/base/dd.c:568 [inline])
[<80db6c04>] (usb_unbind_interface) from [<80a756cc>] (device_remove+0x64/0x6c drivers/base/dd.c:560)
 r10:00000000 r9:849a7480 r8:00000044 r7:849a4074 r6:82777c18 r5:00000000
 r4:849a4030
[<80a75668>] (device_remove) from [<80a76be4>] (__device_release_driver drivers/base/dd.c:1272 [inline])
[<80a75668>] (device_remove) from [<80a76be4>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1295)
 r5:00000000 r4:849a4030
[<80a76a58>] (device_release_driver_internal) from [<80a76c70>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1318)
 r9:849a7480 r8:82fbc140 r7:82fbc138 r6:82fbc10c r5:849a4030 r4:82fbc130
[<80a76c58>] (device_release_driver) from [<80a74d50>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:574)
[<80a74c84>] (bus_remove_device) from [<80a6ee60>] (device_del+0x148/0x38c drivers/base/core.c:3871)
 r9:849a7480 r8:840eb000 r7:04208060 r6:00000000 r5:849a4030 r4:849a4074
[<80a6ed18>] (device_del) from [<80db46a4>] (usb_disable_device+0xdc/0x1f0 drivers/usb/core/message.c:1418)
 r10:00000000 r9:00000000 r8:849a4000 r7:849a7400 r6:851af308 r5:849a7400
 r4:60000113
[<80db45c8>] (usb_disable_device) from [<80da9504>] (usb_disconnect+0xec/0x29c drivers/usb/core/hub.c:2304)
 r10:00000001 r9:84348800 r8:849a74c4 r7:83c83000 r6:849a7480 r5:849a7400
 r4:60000113
[<80da9418>] (usb_disconnect) from [<80dac1b4>] (hub_port_connect drivers/usb/core/hub.c:5361 [inline])
[<80da9418>] (usb_disconnect) from [<80dac1b4>] (hub_port_connect_change drivers/usb/core/hub.c:5661 [inline])
[<80da9418>] (usb_disconnect) from [<80dac1b4>] (port_event drivers/usb/core/hub.c:5821 [inline])
[<80da9418>] (usb_disconnect) from [<80dac1b4>] (hub_event+0xe78/0x194c drivers/usb/core/hub.c:5903)
 r10:00000001 r9:00000100 r8:8390af00 r7:849a7400 r6:83c82800 r5:83c83210
 r4:00000001
[<80dab33c>] (hub_event) from [<80265f30>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3231)
 r10:82f1da05 r9:840eb000 r8:01800000 r7:ddde4000 r6:82f1da00 r5:8390af00
 r4:85005f00
[<80265d7c>] (process_one_work) from [<80266b14>] (process_scheduled_works kernel/workqueue.c:3312 [inline])
[<80265d7c>] (process_one_work) from [<80266b14>] (worker_thread+0x1ec/0x3f4 kernel/workqueue.c:3390)
 r10:840eb000 r9:85005f2c r8:61c88647 r7:ddde4020 r6:82604d40 r5:ddde4000
 r4:85005f00
[<80266928>] (worker_thread) from [<8026fb6c>] (kthread+0x104/0x134 kernel/kthread.c:389)
 r10:00000000 r9:df87de78 r8:84ba0280 r7:85005f00 r6:80266928 r5:840eb000
 r4:8500c1c0
[<8026fa68>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137)
Exception stack(0xdfdadfb0 to 0xdfdadff8)
dfa0:                                     00000000 00000000 00000000 00000000
dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026fa68 r4:8500c1c0
Rebooting in 86400 seconds..


---
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