[ 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 '10.128.1.25' (ECDSA) to the list of known hosts. syzkaller login: [ 45.893922][ T6838] IPVS: ftp: loaded support on port[0] = 21 [ 45.897602][ T6839] IPVS: ftp: loaded support on port[0] = 21 [ 45.904694][ T6836] IPVS: ftp: loaded support on port[0] = 21 [ 45.910736][ T6837] IPVS: ftp: loaded support on port[0] = 21 [ 45.920077][ T6832] IPVS: ftp: loaded support on port[0] = 21 [ 45.920778][ T6840] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 62.926919][T16548] ------------[ cut here ]------------ [ 62.934516][T16574] ------------[ cut here ]------------ [ 62.940179][T16574] ODEBUG: free active (active state 1) object type: rcu_head hint: 0x0 [ 62.948838][T16574] WARNING: CPU: 0 PID: 16574 at lib/debugobjects.c:488 debug_check_no_obj_freed+0x45c/0x640 [ 62.959710][T16574] Kernel panic - not syncing: panic_on_warn set ... [ 62.966552][T16574] CPU: 0 PID: 16574 Comm: syz-executor566 Not tainted 5.9.0-rc2-syzkaller #0 executing program executing program [ 62.975312][T16574] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.985989][T16574] Call Trace: [ 62.989294][T16574] dump_stack+0x1f0/0x31e [ 62.993872][T16574] panic+0x264/0x7a0 [ 62.997778][T16574] ? __warn+0x102/0x250 [ 63.002127][T16574] ? debug_check_no_obj_freed+0x45c/0x640 [ 63.008112][T16574] ? debug_check_no_obj_freed+0x45c/0x640 [ 63.013932][T16574] __warn+0x227/0x250 [ 63.017929][T16574] ? debug_check_no_obj_freed+0x45c/0x640 [ 63.023699][T16574] report_bug+0x1b1/0x2e0 [ 63.028138][T16574] handle_bug+0x42/0x80 [ 63.032420][T16574] exc_invalid_op+0x16/0x40 [ 63.037111][T16574] asm_exc_invalid_op+0x12/0x20 [ 63.042199][T16574] RIP: 0010:debug_check_no_obj_freed+0x45c/0x640 [ 63.048533][T16574] Code: 74 08 4c 89 f7 e8 e4 14 10 fe 4d 8b 06 48 c7 c7 23 9a 15 89 48 c7 c6 46 73 13 89 48 89 da 89 e9 4d 89 f9 31 c0 e8 94 df a1 fd <0f> 0b 48 ba 00 00 00 00 00 fc ff df ff 05 2e 86 ea 05 48 8b 5c 24 [ 63.050972][T16575] ------------[ cut here ]------------ [ 63.068690][T16574] RSP: 0018:ffffc9000e0ffe10 EFLAGS: 00010046 [ 63.074440][T16575] ODEBUG: free active (active state 1) object type: rcu_head hint: 0x0 [ 63.074694][T16575] WARNING: CPU: 1 PID: 16575 at lib/debugobjects.c:488 debug_check_no_obj_freed+0x45c/0x640 [ 63.080501][T16574] RAX: a88b825b5afa8800 RBX: ffffffff8919a3af RCX: ffff888089ab0240 [ 63.080511][T16574] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 63.088827][T16575] Modules linked in: [ 63.099038][T16574] RBP: 0000000000000001 R08: ffffffff815e2109 R09: ffffed1015d041c3 [ 63.099047][T16574] R10: ffffed1015d041c3 R11: 0000000000000000 R12: ffff888090cabd34 [ 63.107274][T16575] CPU: 1 PID: 16575 Comm: syz-executor566 Not tainted 5.9.0-rc2-syzkaller #0 [ 63.115311][T16574] R13: ffffffff8ba72a18 R14: ffffffff894fe588 R15: 0000000000000000 [ 63.115332][T16574] ? vprintk_emit+0x339/0x3c0 [ 63.119444][T16575] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.119459][T16575] RIP: 0010:debug_check_no_obj_freed+0x45c/0x640 [ 63.128170][T16574] kmem_cache_free+0x66/0xf0 [ 63.136295][T16575] Code: 74 08 4c 89 f7 e8 e4 14 10 fe 4d 8b 06 48 c7 c7 23 9a 15 89 48 c7 c6 46 73 13 89 48 89 da 89 e9 4d 89 f9 31 c0 e8 94 df a1 fd <0f> 0b 48 ba 00 00 00 00 00 fc ff df ff 05 2e 86 ea 05 48 8b 5c 24 [ 63.145133][T16574] task_work_run+0x137/0x1c0 [ 63.153529][T16575] RSP: 0018:ffffc9000c8efe10 EFLAGS: 00010046 [ 63.158415][T16574] exit_to_user_mode_prepare+0xfa/0x1b0 [ 63.171840][T16575] RAX: 730052c1191c9e00 RBX: ffffffff8919a3af RCX: ffff888097b6e300 [ 63.171850][T16575] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 63.179005][T16574] syscall_exit_to_user_mode+0x5e/0x1a0 [ 63.183732][T16575] RBP: 0000000000000001 R08: ffffffff815e2109 R09: ffffed1015d241c3 [ 63.183742][T16575] R10: ffffed1015d241c3 R11: 0000000000000000 R12: ffff8880a778a554 [ 63.204099][T16574] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.208748][T16575] R13: ffffffff8ba91060 R14: ffffffff894fe588 R15: 0000000000000000 [ 63.208759][T16575] FS: 00007f47500ca700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 63.214895][T16574] RIP: 0033:0x446a49 [ 63.220516][T16575] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.220525][T16575] CR2: 00007ffc56a17d60 CR3: 000000009f7af000 CR4: 00000000001506e0 [ 63.228484][T16574] Code: e8 8c 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 7b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.236854][T16575] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.242551][T16574] RSP: 002b:00007f47500c9db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 63.250603][T16575] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.250610][T16575] Call Trace: [ 63.258734][T16574] RAX: 0000000000000000 RBX: 00000000006dbc48 RCX: 0000000000446a49 [ 63.258743][T16574] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 [ 63.264717][T16575] kmem_cache_free+0x66/0xf0 [ 63.272811][T16574] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 63.272821][T16574] R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006dbc4c [ 63.281837][T16575] task_work_run+0x137/0x1c0 [ 63.285707][T16574] R13: 00007ffc56a17ccf R14: 00007f47500ca9c0 R15: 0000000000000064 [ 63.398090][T16575] exit_to_user_mode_prepare+0xfa/0x1b0 [ 63.403870][T16575] syscall_exit_to_user_mode+0x5e/0x1a0 [ 63.409457][T16575] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.415484][T16575] RIP: 0033:0x446a49 [ 63.419381][T16575] Code: e8 8c 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 7b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.439123][T16575] RSP: 002b:00007f47500c9db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 63.448216][T16575] RAX: 0000000000000000 RBX: 00000000006dbc48 RCX: 0000000000446a49 [ 63.456179][T16575] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 [ 63.464316][T16575] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 63.472498][T16575] R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006dbc4c [ 63.480720][T16575] R13: 00007ffc56a17ccf R14: 00007f47500ca9c0 R15: 0000000000000064 [ 63.488989][T16575] irq event stamp: 636 [ 63.493174][T16575] hardirqs last enabled at (635): [] call_rcu+0x511/0x840 [ 63.502010][T16575] hardirqs last disabled at (636): [] kmem_cache_free+0x48/0xf0 [ 63.511367][T16575] softirqs last enabled at (0): [] copy_process+0x1165/0x5200 [ 63.520682][T16575] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 63.527868][T16575] ---[ end trace ac8905cdca2cde0a ]--- [ 63.533310][T16575] ------------[ cut here ]------------ [ 63.538841][T16575] ODEBUG: free active (active state 1) object type: rcu_head hint: 0x0 [ 63.547624][T16575] WARNING: CPU: 1 PID: 16575 at lib/debugobjects.c:488 debug_check_no_obj_freed+0x45c/0x640 [ 63.557906][T16575] Modules linked in: [ 63.561797][T16575] CPU: 1 PID: 16575 Comm: syz-executor566 Tainted: G W 5.9.0-rc2-syzkaller #0 [ 63.572100][T16575] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.582269][T16575] RIP: 0010:debug_check_no_obj_freed+0x45c/0x640 [ 63.588656][T16575] Code: 74 08 4c 89 f7 e8 e4 14 10 fe 4d 8b 06 48 c7 c7 23 9a 15 89 48 c7 c6 46 73 13 89 48 89 da 89 e9 4d 89 f9 31 c0 e8 94 df a1 fd <0f> 0b 48 ba 00 00 00 00 00 fc ff df ff 05 2e 86 ea 05 48 8b 5c 24 [ 63.610310][T16575] RSP: 0018:ffffc9000c8efe10 EFLAGS: 00010046 [ 63.616506][T16575] RAX: 730052c1191c9e00 RBX: ffffffff8919a3af RCX: ffff888097b6e300 [ 63.624603][T16575] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 63.632738][T16575] RBP: 0000000000000001 R08: ffffffff815e2109 R09: ffffed1015d241c3 [ 63.640875][T16575] R10: ffffed1015d241c3 R11: 0000000000000000 R12: ffff8880a778a554 [ 63.648837][T16575] R13: ffffffff8ba91060 R14: ffffffff894fe588 R15: 0000000000000000 [ 63.656943][T16575] FS: 00007f47500ca700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 63.665955][T16575] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.672528][T16575] CR2: 00007ffc56a17d60 CR3: 000000009f7af000 CR4: 00000000001506e0 [ 63.681061][T16575] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.689145][T16575] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.697223][T16575] Call Trace: [ 63.700523][T16575] kmem_cache_free+0x66/0xf0 [ 63.705253][T16575] task_work_run+0x137/0x1c0 [ 63.709987][T16575] exit_to_user_mode_prepare+0xfa/0x1b0 [ 63.715700][T16575] syscall_exit_to_user_mode+0x5e/0x1a0 [ 63.721351][T16575] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.727610][T16575] RIP: 0033:0x446a49 [ 63.731580][T16575] Code: e8 8c 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 7b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.751662][T16575] RSP: 002b:00007f47500c9db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 63.760312][T16575] RAX: 0000000000000000 RBX: 00000000006dbc48 RCX: 0000000000446a49 [ 63.768366][T16575] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 [ 63.776431][T16575] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 63.784485][T16575] R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006dbc4c [ 63.792452][T16575] R13: 00007ffc56a17ccf R14: 00007f47500ca9c0 R15: 0000000000000064 [ 63.800592][T16575] irq event stamp: 636 [ 63.804748][T16575] hardirqs last enabled at (635): [] call_rcu+0x511/0x840 [ 63.813682][T16575] hardirqs last disabled at (636): [] kmem_cache_free+0x48/0xf0 [ 63.822955][T16575] softirqs last enabled at (0): [] copy_process+0x1165/0x5200 [ 63.832222][T16575] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 63.839459][T16575] ---[ end trace ac8905cdca2cde0b ]--- [ 63.847979][T16575] ------------[ cut here ]------------ [ 63.853424][T16575] ODEBUG: free active (active state 1) object type: rcu_head hint: 0x0 [ 63.861870][T16575] WARNING: CPU: 1 PID: 16575 at lib/debugobjects.c:488 debug_check_no_obj_freed+0x45c/0x640 [ 63.872554][T16575] Modules linked in: [ 63.876447][T16575] CPU: 1 PID: 16575 Comm: syz-executor566 Tainted: G W 5.9.0-rc2-syzkaller #0 [ 63.886579][T16575] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.897235][T16575] RIP: 0010:debug_check_no_obj_freed+0x45c/0x640 [ 63.903659][T16575] Code: 74 08 4c 89 f7 e8 e4 14 10 fe 4d 8b 06 48 c7 c7 23 9a 15 89 48 c7 c6 46 73 13 89 48 89 da 89 e9 4d 89 f9 31 c0 e8 94 df a1 fd <0f> 0b 48 ba 00 00 00 00 00 fc ff df ff 05 2e 86 ea 05 48 8b 5c 24 [ 63.924013][T16575] RSP: 0018:ffffc9000c8efe10 EFLAGS: 00010046 [ 63.930072][T16575] RAX: 730052c1191c9e00 RBX: ffffffff8919a3af RCX: ffff888097b6e300 [ 63.938163][T16575] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 63.946588][T16575] RBP: 0000000000000001 R08: ffffffff815e2109 R09: ffffed1015d241c3 [ 63.954754][T16575] R10: ffffed1015d241c3 R11: 0000000000000000 R12: ffff8880a778a554 [ 63.963185][T16575] R13: ffffffff8ba91060 R14: ffffffff894fe588 R15: 0000000000000000 [ 63.971595][T16575] FS: 00007f47500ca700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 63.980599][T16575] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.987393][T16575] CR2: 00007ffc56a17d60 CR3: 000000009f7af000 CR4: 00000000001506e0 [ 63.995585][T16575] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.003555][T16575] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.011843][T16575] Call Trace: [ 64.015192][T16575] kmem_cache_free+0x66/0xf0 [ 64.019869][T16575] task_work_run+0x137/0x1c0 [ 64.024738][T16575] exit_to_user_mode_prepare+0xfa/0x1b0 [ 64.030724][T16575] syscall_exit_to_user_mode+0x5e/0x1a0 [ 64.036563][T16575] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.042628][T16575] RIP: 0033:0x446a49 [ 64.046514][T16575] Code: e8 8c 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 7b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 64.066676][T16575] RSP: 002b:00007f47500c9db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 64.075249][T16575] RAX: 0000000000000000 RBX: 00000000006dbc48 RCX: 0000000000446a49 [ 64.083376][T16575] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 [ 64.091430][T16575] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 64.099841][T16575] R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006dbc4c [ 64.108021][T16575] R13: 00007ffc56a17ccf R14: 00007f47500ca9c0 R15: 0000000000000064 [ 64.116080][T16575] irq event stamp: 636 [ 64.120179][T16575] hardirqs last enabled at (635): [] call_rcu+0x511/0x840 [ 64.129293][T16575] hardirqs last disabled at (636): [] kmem_cache_free+0x48/0xf0 [ 64.138596][T16575] softirqs last enabled at (0): [] copy_process+0x1165/0x5200 [ 64.147868][T16575] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 64.155184][T16575] ---[ end trace ac8905cdca2cde0c ]--- [ 64.160653][T16575] ------------[ cut here ]------------ [ 64.166194][T16575] ODEBUG: free active (active state 1) object type: rcu_head hint: 0x0 [ 64.175070][T16575] WARNING: CPU: 1 PID: 16575 at lib/debugobjects.c:488 debug_check_no_obj_freed+0x45c/0x640 [ 64.185489][T16575] Modules linked in: [ 64.189471][T16575] CPU: 1 PID: 16575 Comm: syz-executor566 Tainted: G W 5.9.0-rc2-syzkaller #0 [ 64.199917][T16575] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.210073][T16575] RIP: 0010:debug_check_no_obj_freed+0x45c/0x640 [ 64.216658][T16575] Code: 74 08 4c 89 f7 e8 e4 14 10 fe 4d 8b 06 48 c7 c7 23 9a 15 89 48 c7 c6 46 73 13 89 48 89 da 89 e9 4d 89 f9 31 c0 e8 94 df a1 fd <0f> 0b 48 ba 00 00 00 00 00 fc ff df ff 05 2e 86 ea 05 48 8b 5c 24 [ 64.236447][T16575] RSP: 0018:ffffc9000c8efe10 EFLAGS: 00010046 [ 64.243793][T16575] RAX: 730052c1191c9e00 RBX: ffffffff8919a3af RCX: ffff888097b6e300 [ 64.251844][T16575] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 64.260037][T16575] RBP: 0000000000000001 R08: ffffffff815e2109 R09: ffffed1015d241c3 [ 64.268228][T16575] R10: ffffed1015d241c3 R11: 0000000000000000 R12: ffff8880a778a554 [ 64.276463][T16575] R13: ffffffff8ba91060 R14: ffffffff894fe588 R15: 0000000000000000 [ 64.284514][T16575] FS: 00007f47500ca700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 64.293576][T16575] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.300264][T16575] CR2: 00007ffc56a17d60 CR3: 000000009f7af000 CR4: 00000000001506e0 [ 64.308229][T16575] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.316272][T16575] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.324231][T16575] Call Trace: [ 64.327522][T16575] kmem_cache_free+0x66/0xf0 [ 64.332191][T16575] task_work_run+0x137/0x1c0 [ 64.336947][T16575] exit_to_user_mode_prepare+0xfa/0x1b0 [ 64.342648][T16575] syscall_exit_to_user_mode+0x5e/0x1a0 [ 64.348292][T16575] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.354303][T16575] RIP: 0033:0x446a49 [ 64.358193][T16575] Code: e8 8c 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 7b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 64.378091][T16575] RSP: 002b:00007f47500c9db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 64.386731][T16575] RAX: 0000000000000000 RBX: 00000000006dbc48 RCX: 0000000000446a49 [ 64.394695][T16575] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 [ 64.402831][T16575] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 64.411113][T16575] R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006dbc4c [ 64.415972][T16574] Shutting down cpus with NMI