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@xxxxxxxxxxxxxxxxxxxxxxxxx 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.
