------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: work_struct hint: smc_ib_port_event_work+0x0/0x340 net/smc/smc_ib.c:523
WARNING: CPU: 0 PID: 285 at lib/debugobjects.c:488 debug_print_object lib/debugobjects.c:485 [inline]
WARNING: CPU: 0 PID: 285 at lib/debugobjects.c:488 __debug_check_no_obj_freed lib/debugobjects.c:967 [inline]
WARNING: CPU: 0 PID: 285 at lib/debugobjects.c:488 debug_check_no_obj_freed+0x468/0x620 lib/debugobjects.c:998
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 285 Comm: kworker/u4:5 Not tainted 5.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound ib_unregister_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fb/0x318 lib/dump_stack.c:118
 panic+0x264/0x7a9 kernel/panic.c:221
 __warn+0x209/0x210 kernel/panic.c:582
 report_bug+0x1b6/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0xcf/0x1c0 arch/x86/kernel/traps.c:267
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:debug_print_object lib/debugobjects.c:485 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:967 [inline]
RIP: 0010:debug_check_no_obj_freed+0x468/0x620 lib/debugobjects.c:998
Code: 08 48 89 df e8 89 28 0f fe 4c 8b 03 48 c7 c7 13 ec f0 88 48 c7 c6 0f dd ee 88 4c 89 e2 44 89 f9 4d 89 e9 31 c0 e8 b8 c4 a3 fd <0f> 0b 48 ba 00 00 00 00 00 fc ff df 4c 8b 6d b0 ff 05 86 d0 c4 05
RSP: 0000:ffffc90001dc7b00 EFLAGS: 00010046
RAX: 051147730ba1ce00 RBX: ffffffff892d1200 RCX: ffff8880a8b4e0c0
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90001dc7b98 R08: ffffffff81601324 R09: ffffed1015d44592
R10: ffffed1015d44592 R11: 0000000000000000 R12: ffffffff88f4c97a
R13: ffffffff87de28e0 R14: ffff8880a1512a00 R15: 0000000000000000
 kfree+0xff/0x220 mm/slab.c:3756
 smc_ib_remove_dev+0x1e6/0x230 net/smc/smc_ib.c:583
 remove_client_context+0xb9/0x1e0 drivers/infiniband/core/device.c:724
 disable_device+0xfc/0x300 drivers/infiniband/core/device.c:1268
 __ib_unregister_device+0x70/0x160 drivers/infiniband/core/device.c:1435
 ib_unregister_work+0x19/0x30 drivers/infiniband/core/device.c:1545
 process_one_work+0x7f5/0x10f0 kernel/workqueue.c:2264
 worker_thread+0xbbc/0x1630 kernel/workqueue.c:2410
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..