INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added 'ci-upstream-kasan-gce-9,10.128.0.33' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   45.661510] 
[   45.661865] =============================
[   45.662599] WARNING: suspicious RCU usage
[   45.663206] 4.15.0-rc1+ #203 Not tainted
[   45.663749] -----------------------------
[   45.664476] ./include/trace/events/kmem.h:142 suspicious rcu_dereference_check() usage!
[   45.665610] 
[   45.665610] other info that might help us debug this:
[   45.665610] 
[   45.666730] 
[   45.666730] rcu_scheduler_active = 2, debug_locks = 1
[   45.667642] 1 lock held by syzkaller938817/3084:
[   45.668292]  #0:  (sk_lock-AF_ALG){+.+.}, at: [<000000007fde27e4>] af_alg_wait_for_data+0x2f2/0x650
[   45.669552] 
[   45.669552] stack backtrace:
[   45.670172] CPU: 0 PID: 3084 Comm: syzkaller938817 Not tainted 4.15.0-rc1+ #203
[   45.671176] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   45.672396] Call Trace:
[   45.672791]  dump_stack+0x194/0x257
[   45.673284]  ? arch_local_irq_restore+0x53/0x53
[   45.673922]  lockdep_rcu_suspicious+0x123/0x170
[   45.674546]  ? blkcipher_walk_done+0x72b/0xde0
[   45.675185]  kfree+0x20a/0x250
[   45.675623]  blkcipher_walk_done+0x72b/0xde0
[   45.676222]  encrypt+0x50a/0xaf0
[   45.676701]  ? salsa20_encrypt_bytes+0x300/0x300
[   45.677372]  ? salsa20_encrypt_bytes+0x300/0x300
[   45.678011]  skcipher_decrypt_blkcipher+0x213/0x310
[   45.678681]  ? skcipher_decrypt_blkcipher+0x213/0x310
[   45.679373]  ? sock_kmalloc+0x11f/0x190
[   45.679909]  ? skcipher_encrypt_blkcipher+0x310/0x310
[   45.680616]  ? lock_sock_nested+0x91/0x110
[   45.681221]  ? memset+0x31/0x40
[   45.681673]  skcipher_recvmsg+0xa54/0xf20
[   45.685802]  ? skcipher_release+0x50/0x50
[   45.689924]  ? selinux_socket_recvmsg+0x36/0x40
[   45.694561]  ? security_socket_recvmsg+0x91/0xc0
[   45.699289]  ? skcipher_release+0x50/0x50
[   45.703405]  sock_recvmsg+0xc9/0x110
[   45.707086]  ? __sock_recv_wifi_status+0x210/0x210
[   45.711986]  ___sys_recvmsg+0x29b/0x630
[   45.715945]  ? ___sys_sendmsg+0x8a0/0x8a0
[   45.720082]  ? __handle_mm_fault+0x3e20/0x3e20
[   45.724630]  ? vmacache_find+0x5f/0x280
[   45.728578]  ? up_read+0x1a/0x40
[   45.731931]  ? __do_page_fault+0x3d6/0xc90
[   45.736135]  ? fd_install+0x4d/0x60
[   45.739736]  ? __fdget+0x18/0x20
[   45.743076]  __sys_recvmsg+0xe2/0x210
[   45.746843]  ? __sys_recvmsg+0xe2/0x210
[   45.750800]  ? SyS_sendmmsg+0x60/0x60
[   45.754570]  ? __do_page_fault+0xc90/0xc90
[   45.758774]  ? SyS_setsockopt+0x215/0x360
[   45.762900]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   45.767890]  SyS_recvmsg+0x2d/0x50
[   45.771401]  entry_SYSCALL_64_fastpath+0x1f/0x96
[   45.776125] RIP: 0033:0x43fe99
[   45.779280] RSP: 002b:00007ffc46416548 EFLAGS: 00000207 ORIG_RAX: 000000000000002f
[   45.786963] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe99
[   45.794201] RDX: 0000000000000000 RSI: 0000000020d63fc8 RDI: 0000000000000004
[   45.801440] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
[   45.808677] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401800
[   45.815913] R13: 0000000000401890 R14: 0000000000000000 R15: 0000000000000000
[   45.823342] BUG: unable to handle kernel NULL pointer dereference at 0000000084b9663a
[   45.831293] IP: kfree+0xb2/0x250
[   45.834626] PGD 1cb57d067 P4D 1cb57d067 PUD 1cb57c067 PMD 0 
[   45.840411] Oops: 0000 [#1] SMP KASAN
[   45.844182] Dumping ftrace buffer:
[   45.847685]    (ftrace buffer empty)
[   45.851361] Modules linked in:
[   45.854522] CPU: 0 PID: 3084 Comm: syzkaller938817 Not tainted 4.15.0-rc1+ #203
[   45.861930] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   45.871248] task: 000000003b250d90 task.stack: 000000005c2057e6
[   45.877270] RIP: 0010:kfree+0xb2/0x250
[   45.881120] RSP: 0018:ffff8801cb587780 EFLAGS: 00010046
[   45.886448] RAX: 0000000000000000 RBX: ffff8801cb587948 RCX: ffffffffffffffff
[   45.893682] RDX: ffffea00072d61c0 RSI: 0000000000000000 RDI: ffff8801cb587948
[   45.900919] RBP: ffff8801cb5877a0 R08: 1ffff100396b0ea2 R09: 0000000000000000
[   45.908153] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286
[   45.915388] R13: 0000000000000000 R14: ffff8801cb587948 R15: ffff8801cb5878b0
[   45.922625] FS:  000000000091a880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
[   45.930815] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   45.936661] CR2: 0000000000000074 CR3: 00000001cb564000 CR4: 00000000001406f0
[   45.943897] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   45.951133] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   45.958368] Call Trace:
[   45.960925]  blkcipher_walk_done+0x72b/0xde0
[   45.965303]  encrypt+0x50a/0xaf0
[   45.968637]  ? salsa20_encrypt_bytes+0x300/0x300
[   45.973365]  ? salsa20_encrypt_bytes+0x300/0x300
[   45.978090]  skcipher_decrypt_blkcipher+0x213/0x310
[   45.983072]  ? skcipher_decrypt_blkcipher+0x213/0x310
[   45.988228]  ? sock_kmalloc+0x11f/0x190
[   45.992168]  ? skcipher_encrypt_blkcipher+0x310/0x310
[   45.997323]  ? lock_sock_nested+0x91/0x110
[   46.001527]  ? memset+0x31/0x40
[   46.004775]  skcipher_recvmsg+0xa54/0xf20
[   46.008893]  ? skcipher_release+0x50/0x50
[   46.013401]  ? selinux_socket_recvmsg+0x36/0x40
[   46.018039]  ? security_socket_recvmsg+0x91/0xc0
[   46.022763]  ? skcipher_release+0x50/0x50
[   46.026877]  sock_recvmsg+0xc9/0x110
[   46.030556]  ? __sock_recv_wifi_status+0x210/0x210
[   46.035451]  ___sys_recvmsg+0x29b/0x630
[   46.039404]  ? ___sys_sendmsg+0x8a0/0x8a0
[   46.043538]  ? __handle_mm_fault+0x3e20/0x3e20
[   46.048088]  ? vmacache_find+0x5f/0x280
[   46.052040]  ? up_read+0x1a/0x40
[   46.055376]  ? __do_page_fault+0x3d6/0xc90
[   46.059577]  ? fd_install+0x4d/0x60
[   46.063172]  ? __fdget+0x18/0x20
[   46.066506]  __sys_recvmsg+0xe2/0x210
[   46.070280]  ? __sys_recvmsg+0xe2/0x210
[   46.074224]  ? SyS_sendmmsg+0x60/0x60
[   46.078002]  ? __do_page_fault+0xc90/0xc90
[   46.082217]  ? SyS_setsockopt+0x215/0x360
[   46.086349]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   46.091350]  SyS_recvmsg+0x2d/0x50
[   46.094862]  entry_SYSCALL_64_fastpath+0x1f/0x96
[   46.099585] RIP: 0033:0x43fe99
[   46.102742] RSP: 002b:00007ffc46416548 EFLAGS: 00000207 ORIG_RAX: 000000000000002f
[   46.110415] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe99
[   46.117653] RDX: 0000000000000000 RSI: 0000000020d63fc8 RDI: 0000000000000004
[   46.124891] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
[   46.132222] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401800
[   46.139464] R13: 0000000000401890 R14: 0000000000000000 R15: 0000000000000000
[   46.146709] Code: c2 48 b8 00 00 00 00 00 ea ff ff 48 89 df 48 c1 ea 0c 48 c1 e2 06 48 01 c2 48 8b 42 20 48 8d 48 ff a8 01 48 0f 45 d1 4c 8b 6a 30 <49> 63 75 74 e8 f5 76 af ff 48 89 de 4c 89 ef 4c 8b 75 08 e8 06 
[   46.165784] RIP: kfree+0xb2/0x250 RSP: ffff8801cb587780
[   46.171110] CR2: 0000000000000074
[   46.174533] ---[ end trace 52b07bdff7be1a6e ]---
[   46.179252] Kernel panic - not syncing: Fatal exception in interrupt
[   46.186060] Dumping ftrace buffer:
[   46.189570]    (ftrace buffer empty)
[   46.193249] Kernel Offset: disabled
[   46.196842] Rebooting in 86400 seconds..