[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.191' (ECDSA) to the list of known hosts.
syzkaller login: [   91.312297][   T36] audit: type=1400 audit(1608689706.567:8): avc:  denied  { execmem } for  pid=8495 comm="syz-executor152" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[   92.454292][ T8496] IPVS: ftp: loaded support on port[0] = 21
executing program
[   92.574088][ T3193] BUG: kernel NULL pointer dereference, address: 0000000000000008
[   92.582127][ T3193] #PF: supervisor read access in kernel mode
[   92.588289][ T3193] #PF: error_code(0x0000) - not-present page
[   92.594274][ T3193] PGD 0 P4D 0 
[   92.598531][ T3193] Oops: 0000 [#1] PREEMPT SMP KASAN
[   92.603854][ T3193] CPU: 0 PID: 3193 Comm: kworker/0:3 Not tainted 5.10.0-syzkaller #0
[   92.612828][ T3193] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   92.622922][ T3193] Workqueue: events free_ipc
[   92.627568][ T3193] RIP: 0010:kasan_record_aux_stack+0x77/0xb0
[   92.633673][ T3193] Code: 48 f7 fe 8b 47 24 49 89 f0 48 29 d3 8d 70 ff 41 0f af f0 48 01 ce 48 39 f3 48 0f 46 f3 e8 81 e9 ff ff bf 00 08 00 00 48 89 c3 <8b> 40 08 89 43 0c e8 1e e6 ff ff 89 43 08 5b c3 48 8b 50 08 48 c7
[   92.653300][ T3193] RSP: 0018:ffffc90001d37ae8 EFLAGS: 00010046
[   92.659412][ T3193] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888039800000
[   92.667433][ T3193] RDX: 0000000000000078 RSI: ffff888039800000 RDI: 0000000000000800
[   92.675416][ T3193] RBP: ffffffff837ef3a0 R08: 0000000000400000 R09: 000000000000002e
[   92.683419][ T3193] R10: ffffffff8132b7ea R11: 000000000000003f R12: 0000000000035b40
[   92.691524][ T3193] R13: ffff888039800088 R14: ffffc90001d37c08 R15: 0000000000000200
[   92.699502][ T3193] FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
[   92.709556][ T3193] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.718246][ T3193] CR2: 0000000000000008 CR3: 00000000243c1000 CR4: 00000000001506f0
[   92.726677][ T3193] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   92.734958][ T3193] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   92.743021][ T3193] Call Trace:
[   92.746301][ T3193]  call_rcu+0xbb/0x710
[   92.750459][ T3193]  ? sem_more_checks+0xa0/0xa0
[   92.755249][ T3193]  ipc_rcu_putref+0x83/0xb0
[   92.759747][ T3193]  freeary+0x139c/0x1b30
[   92.763973][ T3193]  ? newary+0xc60/0xc60
[   92.768120][ T3193]  ? rwlock_bug.part.0+0x90/0x90
[   92.773387][ T3193]  ? __radix_tree_lookup+0x211/0x2a0
[   92.778741][ T3193]  free_ipcs+0x98/0x1e0
[   92.782878][ T3193]  ? newary+0xc60/0xc60
[   92.787311][ T3193]  sem_exit_ns+0x1b/0x40
[   92.791546][ T3193]  free_ipc+0xf8/0x200
[   92.795665][ T3193]  process_one_work+0x98d/0x1630
[   92.800606][ T3193]  ? pwq_dec_nr_in_flight+0x320/0x320
[   92.805995][ T3193]  ? rwlock_bug.part.0+0x90/0x90
[   92.810932][ T3193]  ? _raw_spin_lock_irq+0x41/0x50
[   92.815956][ T3193]  worker_thread+0x64c/0x1120
[   92.820628][ T3193]  ? __kthread_parkme+0x13f/0x1e0
[   92.825733][ T3193]  ? process_one_work+0x1630/0x1630
[   92.830931][ T3193]  kthread+0x3b1/0x4a0
[   92.835049][ T3193]  ? kthread_create_worker_on_cpu+0xf0/0xf0
[   92.840987][ T3193]  ret_from_fork+0x1f/0x30
[   92.845404][ T3193] Modules linked in:
[   92.849454][ T3193] CR2: 0000000000000008
[   92.853667][ T3193] ---[ end trace 563139c3b9d70176 ]---
[   92.859132][ T3193] RIP: 0010:kasan_record_aux_stack+0x77/0xb0
[   92.865141][ T3193] Code: 48 f7 fe 8b 47 24 49 89 f0 48 29 d3 8d 70 ff 41 0f af f0 48 01 ce 48 39 f3 48 0f 46 f3 e8 81 e9 ff ff bf 00 08 00 00 48 89 c3 <8b> 40 08 89 43 0c e8 1e e6 ff ff 89 43 08 5b c3 48 8b 50 08 48 c7
[   92.885161][ T3193] RSP: 0018:ffffc90001d37ae8 EFLAGS: 00010046
[   92.891357][ T3193] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888039800000
[   92.899610][ T3193] RDX: 0000000000000078 RSI: ffff888039800000 RDI: 0000000000000800
[   92.908468][ T3193] RBP: ffffffff837ef3a0 R08: 0000000000400000 R09: 000000000000002e
[   92.916663][ T3193] R10: ffffffff8132b7ea R11: 000000000000003f R12: 0000000000035b40
[   92.924900][ T3193] R13: ffff888039800088 R14: ffffc90001d37c08 R15: 0000000000000200
[   92.932931][ T3193] FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
[   92.942031][ T3193] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.948617][ T3193] CR2: 0000000000000008 CR3: 00000000243c1000 CR4: 00000000001506f0
[   92.963118][ T3193] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   92.971209][ T3193] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   92.979196][ T3193] Kernel panic - not syncing: Fatal exception
[   92.986021][ T3193] Kernel Offset: disabled
[   92.990341][ T3193] Rebooting in 86400 seconds..