RBP: 000000000075bf20 R08: fe03f80fe03f80ff R09: 00000000fbad8001 R10: 0000000000000400 R11: 0000000000000246 R12: 00007f935aecd6d4 R13: 00000000004c8b8d R14: 00000000004dfcb8 R15: 0000000000000003 ------------[ cut here ]------------ ODEBUG: free active (active state 1) object type: rcu_head hint: (null) WARNING: CPU: 0 PID: 17949 at lib/debugobjects.c:325 debug_print_object+0x168/0x250 lib/debugobjects.c:325 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 17949 Comm: syz-executor.3 Not tainted 4.19.75 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 panic+0x263/0x507 kernel/panic.c:185 __warn.cold+0x20/0x4a kernel/panic.c:540 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037 RIP: 0010:debug_print_object+0x168/0x250 lib/debugobjects.c:325 Code: dd 20 56 82 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 20 56 82 87 48 c7 c7 60 4b 82 87 e8 d6 04 19 fe <0f> 0b 83 05 cb 83 17 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 RSP: 0018:ffff888029107b70 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8155dbd6 RDI: ffffed1005220f60 RBP: ffff888029107bb0 R08: ffff88805696a4c0 R09: ffffed1015d03ee3 R10: ffffed1015d03ee2 R11: ffff8880ae81f717 R12: 0000000000000001 R13: ffffffff8879f200 R14: 0000000000000000 R15: ffff88804bf27860 __debug_check_no_obj_freed lib/debugobjects.c:785 [inline] debug_check_no_obj_freed+0x29f/0x464 lib/debugobjects.c:817 kmem_cache_free+0x18f/0x260 mm/slab.c:3764 free_task_struct kernel/fork.c:162 [inline] free_task+0xdd/0x120 kernel/fork.c:416 __put_task_struct+0x20f/0x4c0 kernel/fork.c:689 put_task_struct include/linux/sched/task.h:96 [inline] finish_task_switch+0x52b/0x780 kernel/sched/core.c:2710 context_switch kernel/sched/core.c:2829 [inline] __schedule+0x86e/0x1dc0 kernel/sched/core.c:3474 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:3701 retint_kernel+0x1b/0x2d RIP: 0010:exit_to_usermode_loop+0x73/0x2c0 arch/x86/entry/common.c:152 Code: 88 48 c1 e8 03 42 80 3c 20 00 0f 85 1f 02 00 00 48 83 3d a7 b5 71 07 00 0f 84 f4 01 00 00 e8 04 d2 6a 00 fb 66 0f 1f 44 00 00 <41> 89 dd 31 ff 41 83 e5 08 44 89 ee e8 6c d3 6a 00 45 85 ed 0f 85 RSP: 0018:ffff888029107ee0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff02 RAX: ffff88805696a4c0 RBX: 0000000000000008 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8100907c RDI: ffff88805696ad3c RBP: ffff888029107f10 R08: ffff88805696a4c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff1100ad2d498 R14: ffff888029107f58 R15: ffff88805696a4c0 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ef1 Code: 75 14 b8 23 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 24 d3 fb ff c3 48 83 ec 08 e8 ea 46 00 00 48 89 04 24 b8 23 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 33 47 00 00 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffeff40c3e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000023 RAX: 0000000000000000 RBX: 00000000000e4f99 RCX: 0000000000457ef1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffeff40c3f0 RBP: 0000000000000001 R08: ffffffffffffffff R09: ffffffffffffffff R10: 00007ffeff40c4e0 R11: 0000000000000293 R12: 000000000075bf20 R13: 000000000075c9a0 R14: 00000000007602c8 R15: 000000000075bf2c ======================================================