[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.21' (ECDSA) to the list of known hosts. syzkaller login: [ 66.644784][ T6857] IPVS: ftp: loaded support on port[0] = 21 [ 66.649441][ T6851] IPVS: ftp: loaded support on port[0] = 21 [ 66.655717][ T6855] IPVS: ftp: loaded support on port[0] = 21 [ 66.668780][ T6859] IPVS: ftp: loaded support on port[0] = 21 [ 66.679931][ T6858] IPVS: ftp: loaded support on port[0] = 21 [ 66.690178][ T6856] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 76.617560][T10925] ------------[ cut here ]------------ [ 76.623096][T10925] ODEBUG: free active (active state 1) object type: rcu_head hint: 0x0 [ 76.631679][T10921] ------------[ cut here ]------------ [ 76.631755][T10925] WARNING: CPU: 0 PID: 10925 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 76.637185][T10921] ODEBUG: free active (active state 1) object type: rcu_head hint: 0x0 [ 76.646729][T10925] Kernel panic - not syncing: panic_on_warn set ... [ 76.655349][T10921] WARNING: CPU: 1 PID: 10921 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 76.661567][T10925] CPU: 0 PID: 10925 Comm: syz-executor256 Not tainted 5.9.0-rc1-syzkaller #0 [ 76.671085][T10921] Modules linked in: [ 76.679892][T10925] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.683797][T10921] CPU: 1 PID: 10921 Comm: syz-executor256 Not tainted 5.9.0-rc1-syzkaller #0 [ 76.693853][T10925] Call Trace: [ 76.702610][T10921] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.702643][T10921] RIP: 0010:debug_print_object+0x160/0x250 [ 76.705937][T10925] dump_stack+0x18f/0x20d [ 76.715990][T10921] Code: dd 60 27 94 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 60 27 94 88 48 c7 c7 c0 1c 94 88 e8 82 36 a6 fd <0f> 0b 83 05 c3 53 13 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 76.722014][T10925] panic+0x2e3/0x75c [ 76.726335][T10921] RSP: 0018:ffffc9000e297dd0 EFLAGS: 00010082 [ 76.745974][T10925] ? __warn_printk+0xf3/0xf3 [ 76.749871][T10921] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 76.755940][T10925] ? console_unlock+0x7f0/0xf30 [ 76.760511][T10921] RDX: ffff8880a1ea8100 RSI: ffffffff815dafc7 RDI: fffff52001c52fac [ 76.768495][T10925] ? __warn.cold+0x5/0x4a [ 76.773336][T10921] RBP: 0000000000000002 R08: 0000000000000001 R09: ffff8880ae720f8b [ 76.773352][T10921] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89bd6780 [ 76.781348][T10925] ? __warn+0xd6/0x1f2 [ 76.785653][T10921] R13: 0000000000000000 R14: dead000000000100 R15: dffffc0000000000 [ 76.793655][T10925] ? debug_print_object+0x160/0x250 [ 76.801620][T10921] FS: 00007ffb65530700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 76.805688][T10925] __warn.cold+0x20/0x4a [ 76.813649][T10921] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.818859][T10925] ? debug_print_object+0x160/0x250 [ 76.827781][T10921] CR2: 0000000020001100 CR3: 000000009f7f5000 CR4: 00000000001506e0 [ 76.832015][T10925] report_bug+0x1bd/0x210 [ 76.838578][T10921] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.843794][T10925] handle_bug+0x38/0x90 [ 76.851760][T10921] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.856090][T10925] ? __warn_printk+0xc6/0xf3 [ 76.864059][T10921] Call Trace: [ 76.868213][T10925] exc_invalid_op+0x14/0x40 [ 76.876176][T10921] debug_check_no_obj_freed+0x301/0x41c [ 76.880753][T10925] asm_exc_invalid_op+0x12/0x20 [ 76.884022][T10921] kmem_cache_free.part.0+0x16d/0x1f0 [ 76.888519][T10925] RIP: 0010:debug_print_object+0x160/0x250 [ 76.894052][T10921] task_work_run+0xdd/0x190 [ 76.898890][T10925] Code: dd 60 27 94 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 60 27 94 88 48 c7 c7 c0 1c 94 88 e8 82 36 a6 fd <0f> 0b 83 05 c3 53 13 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 76.904271][T10921] exit_to_user_mode_prepare+0x195/0x1c0 [ 76.910053][T10925] RSP: 0018:ffffc9000e267dd0 EFLAGS: 00010082 [ 76.914559][T10921] syscall_exit_to_user_mode+0x59/0x2b0 [ 76.934138][T10925] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 76.934156][T10925] RDX: ffff8880968341c0 RSI: ffffffff815dafc7 RDI: fffff52001c4cfac [ 76.939794][T10921] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 76.945870][T10925] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ae620f8b [ 76.951415][T10921] RIP: 0033:0x446aa9 [ 76.959401][T10925] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89bd6780 [ 76.967400][T10921] Code: e8 6c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 76.973294][T10925] R13: 0000000000000000 R14: dead000000000100 R15: dffffc0000000000 [ 76.973324][T10925] ? vprintk_func+0x97/0x1a6 [ 76.981288][T10921] RSP: 002b:00007ffb6552fd88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 76.985189][T10925] debug_check_no_obj_freed+0x301/0x41c [ 76.993148][T10921] RAX: 0000000000000000 RBX: 00000000006dbc48 RCX: 0000000000446aa9 [ 77.012761][T10925] kmem_cache_free.part.0+0x16d/0x1f0 [ 77.020722][T10921] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 [ 77.025316][T10925] task_work_run+0xdd/0x190 [ 77.033714][T10921] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 77.039281][T10925] exit_to_user_mode_prepare+0x195/0x1c0 [ 77.047240][T10921] R10: 0000000020001100 R11: 0000000000000246 R12: 00000000006dbc4c [ 77.052616][T10925] syscall_exit_to_user_mode+0x59/0x2b0 [ 77.060572][T10921] R13: 0000000000000005 R14: 0000000000000004 R15: 00007ffb655306d0 [ 77.065074][T10925] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 77.073048][T10921] irq event stamp: 852 [ 77.078679][T10925] RIP: 0033:0x446aa9 [ 77.086657][T10921] hardirqs last enabled at (851): [] call_rcu+0x360/0x7e0 [ 77.092184][T10925] Code: e8 6c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 77.100159][T10921] hardirqs last disabled at (852): [] kmem_cache_free.part.0+0x3e/0x1f0 [ 77.106028][T10925] RSP: 002b:00007ffb6552fd88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 77.110101][T10921] softirqs last enabled at (430): [] asm_call_on_stack+0xf/0x20 [ 77.113970][T10925] RAX: 0000000000000000 RBX: 00000000006dbc48 RCX: 0000000000446aa9 [ 77.122764][T10921] softirqs last disabled at (369): [] asm_call_on_stack+0xf/0x20 [ 77.142357][T10925] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 [ 77.152286][T10921] ---[ end trace 024a5696a440d8da ]--- [ 77.160696][T10925] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 77.169966][T10921] ------------[ cut here ]------------ [ 77.177950][T10925] R10: 0000000020001100 R11: 0000000000000246 R12: 00000000006dbc4c [ 77.177967][T10925] R13: 0000000000000005 R14: 0000000000000004 R15: 00007ffb655306d0 [ 77.187254][T10921] ODEBUG: free active (active state 1) object type: rcu_head hint: 0x0 [ 77.238640][T10921] WARNING: CPU: 1 PID: 10921 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 77.248182][T10921] Modules linked in: [ 77.252107][T10921] CPU: 1 PID: 10921 Comm: syz-executor256 Tainted: G W 5.9.0-rc1-syzkaller #0 [ 77.262252][T10921] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.272330][T10921] RIP: 0010:debug_print_object+0x160/0x250 [ 77.278145][T10921] Code: dd 60 27 94 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 60 27 94 88 48 c7 c7 c0 1c 94 88 e8 82 36 a6 fd <0f> 0b 83 05 c3 53 13 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 77.297760][T10921] RSP: 0018:ffffc9000e297dd0 EFLAGS: 00010082 [ 77.303833][T10921] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 77.311818][T10921] RDX: ffff8880a1ea8100 RSI: ffffffff815dafc7 RDI: fffff52001c52fac [ 77.319800][T10921] RBP: 0000000000000003 R08: 0000000000000001 R09: ffff8880ae720f8b [ 77.327774][T10921] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff89bd6780 [ 77.335751][T10921] R13: 0000000000000000 R14: dead000000000100 R15: dffffc0000000000 [ 77.343730][T10921] FS: 00007ffb65530700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 77.352667][T10921] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.359258][T10921] CR2: 0000000020001100 CR3: 000000009f7f5000 CR4: 00000000001506e0 [ 77.367240][T10921] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.375221][T10921] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.383203][T10921] Call Trace: [ 77.386506][T10921] debug_check_no_obj_freed+0x301/0x41c [ 77.392087][T10921] kmem_cache_free.part.0+0x16d/0x1f0 [ 77.397469][T10921] task_work_run+0xdd/0x190 [ 77.401978][T10921] exit_to_user_mode_prepare+0x195/0x1c0 [ 77.407624][T10921] syscall_exit_to_user_mode+0x59/0x2b0 [ 77.413177][T10921] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 77.419069][T10921] RIP: 0033:0x446aa9 [ 77.422962][T10921] Code: e8 6c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 77.442577][T10921] RSP: 002b:00007ffb6552fd88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 77.451000][T10921] RAX: 0000000000000000 RBX: 00000000006dbc48 RCX: 0000000000446aa9 [ 77.458976][T10921] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 [ 77.466953][T10921] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 77.474935][T10921] R10: 0000000020001100 R11: 0000000000000246 R12: 00000000006dbc4c [ 77.482915][T10921] R13: 0000000000000005 R14: 0000000000000004 R15: 00007ffb655306d0 [ 77.490927][T10921] irq event stamp: 852 [ 77.495015][T10921] hardirqs last enabled at (851): [] call_rcu+0x360/0x7e0 [ 77.503798][T10921] hardirqs last disabled at (852): [] kmem_cache_free.part.0+0x3e/0x1f0 [ 77.513701][T10921] softirqs last enabled at (430): [] asm_call_on_stack+0xf/0x20 [ 77.522992][T10921] softirqs last disabled at (369): [] asm_call_on_stack+0xf/0x20 [ 77.532283][T10921] ---[ end trace 024a5696a440d8db ]--- [ 77.537755][T10921] ------------[ cut here ]------------ [ 77.543216][T10921] ODEBUG: free active (active state 1) object type: rcu_head hint: 0x0 [ 77.551851][T10921] WARNING: CPU: 1 PID: 10921 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 77.561407][T10921] Modules linked in: [ 77.565325][T10921] CPU: 1 PID: 10921 Comm: syz-executor256 Tainted: G W 5.9.0-rc1-syzkaller #0 [ 77.575497][T10921] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.585580][T10921] RIP: 0010:debug_print_object+0x160/0x250 [ 77.591389][T10921] Code: dd 60 27 94 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 60 27 94 88 48 c7 c7 c0 1c 94 88 e8 82 36 a6 fd <0f> 0b 83 05 c3 53 13 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 77.611001][T10921] RSP: 0018:ffffc9000e297dd0 EFLAGS: 00010082 [ 77.617071][T10921] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 77.625048][T10921] RDX: ffff8880a1ea8100 RSI: ffffffff815dafc7 RDI: fffff52001c52fac [ 77.633113][T10921] RBP: 0000000000000004 R08: 0000000000000001 R09: ffff8880ae720f8b [ 77.641090][T10921] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff89bd6780 [ 77.649067][T10921] R13: 0000000000000000 R14: dead000000000100 R15: dffffc0000000000 [ 77.657055][T10921] FS: 00007ffb65530700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 77.665989][T10921] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.672578][T10921] CR2: 0000000020001100 CR3: 000000009f7f5000 CR4: 00000000001506e0 [ 77.680556][T10921] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.688553][T10921] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.696522][T10921] Call Trace: [ 77.699830][T10921] debug_check_no_obj_freed+0x301/0x41c [ 77.705387][T10921] kmem_cache_free.part.0+0x16d/0x1f0 [ 77.710772][T10921] task_work_run+0xdd/0x190 [ 77.715288][T10921] exit_to_user_mode_prepare+0x195/0x1c0 [ 77.720940][T10921] syscall_exit_to_user_mode+0x59/0x2b0 [ 77.726500][T10921] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 77.732413][T10921] RIP: 0033:0x446aa9 [ 77.736326][T10921] Code: e8 6c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 77.755938][T10921] RSP: 002b:00007ffb6552fd88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 77.764377][T10921] RAX: 0000000000000000 RBX: 00000000006dbc48 RCX: 0000000000446aa9 [ 77.772360][T10921] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 [ 77.780342][T10921] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 77.788323][T10921] R10: 0000000020001100 R11: 0000000000000246 R12: 00000000006dbc4c [ 77.796312][T10921] R13: 0000000000000005 R14: 0000000000000004 R15: 00007ffb655306d0 [ 77.804308][T10921] irq event stamp: 852 [ 77.808383][T10921] hardirqs last enabled at (851): [] call_rcu+0x360/0x7e0 [ 77.817155][T10921] hardirqs last disabled at (852): [] kmem_cache_free.part.0+0x3e/0x1f0 [ 77.827062][T10921] softirqs last enabled at (430): [] asm_call_on_stack+0xf/0x20 [ 77.836359][T10921] softirqs last disabled at (369): [] asm_call_on_stack+0xf/0x20 [ 77.845642][T10921] ---[ end trace 024a5696a440d8dc ]--- [ 77.851104][T10921] ------------[ cut here ]------------ [ 77.856598][T10921] ODEBUG: free active (active state 1) object type: rcu_head hint: 0x0 [ 77.865253][T10921] WARNING: CPU: 1 PID: 10921 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 77.874802][T10921] Modules linked in: [ 77.878705][T10921] CPU: 1 PID: 10921 Comm: syz-executor256 Tainted: G W 5.9.0-rc1-syzkaller #0 [ 77.888854][T10921] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.898953][T10921] RIP: 0010:debug_print_object+0x160/0x250 [ 77.904782][T10921] Code: dd 60 27 94 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 60 27 94 88 48 c7 c7 c0 1c 94 88 e8 82 36 a6 fd <0f> 0b 83 05 c3 53 13 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 77.924399][T10921] RSP: 0018:ffffc9000e297dd0 EFLAGS: 00010082 [ 77.930480][T10921] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 77.938478][T10921] RDX: ffff8880a1ea8100 RSI: ffffffff815dafc7 RDI: fffff52001c52fac [ 77.946468][T10921] RBP: 0000000000000005 R08: 0000000000000001 R09: ffff8880ae720f8b [ 77.954464][T10921] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff89bd6780 [ 77.962472][T10921] R13: 0000000000000000 R14: dead000000000100 R15: dffffc0000000000 [ 77.970460][T10921] FS: 00007ffb65530700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 77.979415][T10921] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.986007][T10921] CR2: 0000000020001100 CR3: 000000009f7f5000 CR4: 00000000001506e0 [ 77.994011][T10921] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.002003][T10921] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.009983][T10921] Call Trace: [ 78.013304][T10921] debug_check_no_obj_freed+0x301/0x41c [ 78.018881][T10921] kmem_cache_free.part.0+0x16d/0x1f0 [ 78.024269][T10921] task_work_run+0xdd/0x190 [ 78.028802][T10921] exit_to_user_mode_prepare+0x195/0x1c0 [ 78.034461][T10921] syscall_exit_to_user_mode+0x59/0x2b0 [ 78.040016][T10921] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 78.045909][T10921] RIP: 0033:0x446aa9 [ 78.049805][T10921] Code: e8 6c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 78.069435][T10921] RSP: 002b:00007ffb6552fd88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 78.077860][T10921] RAX: 0000000000000000 RBX: 00000000006dbc48 RCX: 0000000000446aa9 [ 78.085842][T10921] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 [ 78.093826][T10921] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 78.101805][T10921] R10: 0000000020001100 R11: 0000000000000246 R12: 00000000006dbc4c [ 78.109789][T10921] R13: 0000000000000005 R14: 0000000000000004 R15: 00007ffb655306d0 [ 78.117784][T10921] irq event stamp: 852 [ 78.121866][T10921] hardirqs last enabled at (851): [] call_rcu+0x360/0x7e0 [ 78.130639][T10921] hardirqs last disabled at (852): [] kmem_cache_free.part.0+0x3e/0x1f0 [ 78.140539][T10921] softirqs last enabled at (430): [] asm_call_on_stack+0xf/0x20 [ 78.149840][T10921] softirqs last disabled at (369): [] asm_call_on_stack+0xf/0x20 [ 78.159116][T10921] ---[ end trace 024a5696a440d8dd ]--- [ 78.291194][T10925] Shutting down cpus with NMI [ 78.297252][T10925] Kernel Offset: disabled [ 78.301639][T10925] Rebooting in 86400 seconds..