bisecting fixing commit since d7c5303fbc8ac874ae3e597a5a0d3707dc0230b4 building syzkaller on 858ea628800647d5e5b68b11441e42b8ef5652c1 testing commit d7c5303fbc8ac874ae3e597a5a0d3707dc0230b4 with gcc (GCC) 10.2.1 20210217 kernel signature: 21d204cf96151e965038ec8e3272739cd99d84cd40de629413df1db4035028ce all runs: crashed: WARNING: ODEBUG bug in smsusb_term_device testing current HEAD b7050b242430f3170e0b57f5f55136e44cb8dc66 testing commit b7050b242430f3170e0b57f5f55136e44cb8dc66 with gcc (GCC) 10.2.1 20210217 kernel signature: cb1e164cf7f1f2559205255b4f66c3ca6e2cfcdafdaca9a38e35f538e987153a all runs: crashed: WARNING: ODEBUG bug in smsusb_term_device revisions tested: 2, total time: 20m29.058300635s (build: 13m37.036223031s, test: 6m30.494631504s) the crash still happens on HEAD commit msg: Merge tag 'pinctrl-v5.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl crash: WARNING: ODEBUG bug in smsusb_term_device smsmdtv:smscore_start_device: set device mode failed , rc -22 smsusb:smsusb_init_device: smscore_start_device(...) failed ------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: work_struct hint: do_submit_urb+0x0/0x3e0 drivers/media/usb/siano/smsusb.c:146 WARNING: CPU: 1 PID: 3801 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Modules linked in: CPU: 1 PID: 3801 Comm: kworker/1:2 Not tainted 5.13.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 af 00 00 00 48 8b 14 dd 80 42 ff 88 4c 89 ee 48 c7 c7 80 36 ff 88 e8 ca 35 8d 04 <0f> 0b 83 05 55 0e d9 08 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffc90003b4edc8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff52000769dab RBP: 0000000000000003 R08: 0000000000000001 R09: ffff8880b9f1fa5b R10: ffffed10173e3f4b R11: 735f6f64203a746e R12: ffffffff88aa32e0 R13: ffffffff88ff3cc0 R14: ffffffff81430380 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fac22638028 CR3: 00000000273bf000 CR4: 0000000000350ee0 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:987 [inline] debug_check_no_obj_freed+0x301/0x420 lib/debugobjects.c:1018 slab_free_hook mm/slub.c:1558 [inline] slab_free_freelist_hook+0x174/0x240 mm/slub.c:1608 slab_free mm/slub.c:3168 [inline] kfree+0xe5/0x7f0 mm/slub.c:4212 smsusb_term_device+0x176/0x2a0 drivers/media/usb/siano/smsusb.c:350 smsusb_init_device+0x961/0x9d7 drivers/media/usb/siano/smsusb.c:487 smsusb_probe+0xc0c/0xca4 drivers/media/usb/siano/smsusb.c:566 usb_probe_interface+0x274/0x6a0 drivers/usb/core/driver.c:396 really_probe+0x1fd/0xd10 drivers/base/dd.c:576 driver_probe_device+0x21a/0x3b0 drivers/base/dd.c:763 bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:431 __device_attach+0x1db/0x410 drivers/base/dd.c:938 bus_probe_device+0x19d/0x250 drivers/base/bus.c:491 device_add+0x9f0/0x1d60 drivers/base/core.c:3324 usb_set_configuration+0x9fc/0x1750 drivers/usb/core/message.c:2164 usb_generic_driver_probe+0x74/0xa0 drivers/usb/core/generic.c:238 usb_probe_device+0x98/0x240 drivers/usb/core/driver.c:293 really_probe+0x1fd/0xd10 drivers/base/dd.c:576 driver_probe_device+0x21a/0x3b0 drivers/base/dd.c:763 bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:431 __device_attach+0x1db/0x410 drivers/base/dd.c:938 bus_probe_device+0x19d/0x250 drivers/base/bus.c:491 device_add+0x9f0/0x1d60 drivers/base/core.c:3324 usb_new_device.cold+0x69a/0xee1 drivers/usb/core/hub.c:2558 hub_port_connect drivers/usb/core/hub.c:5278 [inline] hub_port_connect_change drivers/usb/core/hub.c:5418 [inline] port_event drivers/usb/core/hub.c:5564 [inline] hub_event+0x10a3/0x36d0 drivers/usb/core/hub.c:5646 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2276 worker_thread+0x598/0xf80 kernel/workqueue.c:2422 kthread+0x36f/0x450 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294