[ OK ] Started Getty on tty3. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.53' (ECDSA) to the list of known hosts. syzkaller login: [ 66.789453][ T27] audit: type=1400 audit(1598873567.548:8): avc: denied { execmem } for pid=6840 comm="syz-executor984" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 66.827758][ T6848] IPVS: ftp: loaded support on port[0] = 21 [ 66.849605][ T6850] IPVS: ftp: loaded support on port[0] = 21 [ 66.849650][ T6849] IPVS: ftp: loaded support on port[0] = 21 [ 66.864367][ T6852] IPVS: ftp: loaded support on port[0] = 21 [ 66.864402][ T6851] IPVS: ftp: loaded support on port[0] = 21 [ 66.876473][ T6847] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 67.052801][ T27] audit: type=1400 audit(1598873567.818:9): avc: denied { block_suspend } for pid=6939 comm="syz-executor984" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 77.419694][T10851] ------------[ cut here ]------------ [ 77.425203][T10851] ODEBUG: free active (active state 1) object type: rcu_head hint: 0x0 [ 77.433664][T10851] WARNING: CPU: 0 PID: 10851 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 77.443204][T10851] Kernel panic - not syncing: panic_on_warn set ... [ 77.449804][T10851] CPU: 0 PID: 10851 Comm: syz-executor984 Not tainted 5.9.0-rc2-syzkaller #0 [ 77.458661][T10851] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.468720][T10851] Call Trace: [ 77.472020][T10851] dump_stack+0x198/0x1fd [ 77.476358][T10851] panic+0x347/0x7c0 [ 77.480262][T10851] ? __warn_printk+0xf3/0xf3 [ 77.484870][T10851] ? _raw_spin_unlock+0x24/0x40 [ 77.489729][T10851] ? __printk_safe_exit+0x5/0x10 [ 77.494676][T10851] ? console_unlock+0x733/0xe60 [ 77.499542][T10851] ? __warn.cold+0x5/0x46 [ 77.503967][T10851] ? __warn+0xd6/0x1f2 [ 77.508048][T10851] ? debug_print_object+0x160/0x250 [ 77.513262][T10851] __warn.cold+0x20/0x46 [ 77.517511][T10851] ? wake_up_klogd.part.0+0x8c/0xc0 [ 77.522838][T10851] ? debug_print_object+0x160/0x250 [ 77.528055][T10851] report_bug+0x1bd/0x210 [ 77.532416][T10851] handle_bug+0x38/0x90 [ 77.536589][T10851] exc_invalid_op+0x14/0x40 [ 77.541115][T10851] asm_exc_invalid_op+0x12/0x20 [ 77.545986][T10851] RIP: 0010:debug_print_object+0x160/0x250 [ 77.551804][T10851] Code: dd e0 27 94 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd e0 27 94 88 48 c7 c7 40 1d 94 88 e8 f2 34 a6 fd <0f> 0b 83 05 43 50 13 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 77.571420][T10851] RSP: 0018:ffffc9000d6dfdc8 EFLAGS: 00010082 [ 77.577500][T10851] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 77.585485][T10851] RDX: ffff8880a80d6340 RSI: ffffffff815db9a7 RDI: fffff52001adbfab [ 77.593468][T10851] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ae620f8b [ 77.601446][T10851] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89bd68c0 [ 77.609455][T10851] R13: 0000000000000000 R14: dead000000000100 R15: dffffc0000000000 [ 77.617458][T10851] ? vprintk_func+0x97/0x1a6 [ 77.622085][T10851] ? debug_print_object+0x160/0x250 [ 77.627298][T10851] ? do_raw_spin_unlock+0x171/0x230 [ 77.632556][T10851] debug_check_no_obj_freed+0x301/0x41c [ 77.638127][T10851] kmem_cache_free.part.0+0x151/0x1e0 [ 77.643516][T10851] task_work_run+0xdd/0x190 [ 77.648049][T10851] exit_to_user_mode_prepare+0x1e1/0x200 [ 77.653700][T10851] syscall_exit_to_user_mode+0x7e/0x2e0 [ 77.659259][T10851] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 77.665159][T10851] RIP: 0033:0x446aa9 [ 77.669060][T10851] 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 [ 77.688690][T10851] RSP: 002b:00007f30d6263d88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 77.697116][T10851] RAX: 0000000000000000 RBX: 00000000006dbc48 RCX: 0000000000446aa9 [ 77.705105][T10851] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 [ 77.713091][T10851] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 77.721073][T10851] R10: 0000000020001100 R11: 0000000000000246 R12: 00000000006dbc4c [ 77.729325][T10851] R13: 0000000000000005 R14: 0000000000000004 R15: 00007f30d62646d0 [ 77.738575][T10851] Kernel Offset: disabled [ 77.743013][T10851] Rebooting in 86400 seconds..