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-mmots-kasan-gce-4,10.128.15.196' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   40.675057] 
[   40.675386] =============================
[   40.675939] WARNING: suspicious RCU usage
[   40.676648] 4.15.0-rc1-mm1+ #29 Not tainted
[   40.677247] -----------------------------
[   40.677801] ./include/trace/events/kmem.h:142 suspicious rcu_dereference_check() usage!
[   40.678886] 
[   40.678886] other info that might help us debug this:
[   40.678886] 
[   40.680031] 
[   40.680031] rcu_scheduler_active = 2, debug_locks = 1
[   40.680932] 1 lock held by syzkaller250371/3084:
[   40.681607]  #0:  (sk_lock-AF_ALG){+.+.}, at: [<000000003c6ecc3b>] af_alg_wait_for_data+0x2f2/0x650
[   40.682883] 
[   40.682883] stack backtrace:
[   40.683534] CPU: 1 PID: 3084 Comm: syzkaller250371 Not tainted 4.15.0-rc1-mm1+ #29
[   40.684588] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   40.685807] Call Trace:
[   40.686167]  dump_stack+0x194/0x257
[   40.686676]  ? arch_local_irq_restore+0x53/0x53
[   40.687312]  lockdep_rcu_suspicious+0x123/0x170
[   40.687936]  ? blkcipher_walk_done+0x72b/0xde0
[   40.688572]  kfree+0x20a/0x250
[   40.689008]  blkcipher_walk_done+0x72b/0xde0
[   40.689665]  encrypt+0x50a/0xaf0
[   40.690127]  ? salsa20_encrypt_bytes+0x300/0x300
[   40.690797]  ? salsa20_encrypt_bytes+0x300/0x300
[   40.691431]  skcipher_decrypt_blkcipher+0x213/0x310
[   40.692099]  ? skcipher_decrypt_blkcipher+0x213/0x310
[   40.692802]  ? sock_kmalloc+0x11f/0x190
[   40.693355]  ? skcipher_encrypt_blkcipher+0x310/0x310
[   40.694043]  ? lock_sock_nested+0x91/0x110
[   40.694611]  ? memset+0x31/0x40
[   40.695059]  skcipher_recvmsg+0xa54/0xf20
[   40.698526]  ? skcipher_release+0x50/0x50
[   40.702644]  ? selinux_socket_recvmsg+0x36/0x40
[   40.707284]  ? security_socket_recvmsg+0x91/0xc0
[   40.712011]  ? skcipher_release+0x50/0x50
[   40.716130]  sock_recvmsg+0xc9/0x110
[   40.719816]  ? __sock_recv_wifi_status+0x210/0x210
[   40.724715]  ___sys_recvmsg+0x29b/0x630
[   40.728667]  ? ___sys_sendmsg+0x8a0/0x8a0
[   40.732803]  ? __handle_mm_fault+0x3e60/0x3e60
[   40.737350]  ? vmacache_find+0x5f/0x280
[   40.741300]  ? up_read+0x1a/0x40
[   40.744639]  ? __do_page_fault+0x3d6/0xc90
[   40.748849]  ? fd_install+0x4d/0x60
[   40.752451]  ? __fdget+0x18/0x20
[   40.755791]  __sys_recvmsg+0xe2/0x210
[   40.759556]  ? __sys_recvmsg+0xe2/0x210
[   40.763498]  ? SyS_sendmmsg+0x60/0x60
[   40.767267]  ? __do_page_fault+0xc90/0xc90
[   40.771474]  ? SyS_setsockopt+0x215/0x360
[   40.775688]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   40.780679]  SyS_recvmsg+0x2d/0x50
[   40.784196]  entry_SYSCALL_64_fastpath+0x1f/0x96
[   40.788918] RIP: 0033:0x43fe99
[   40.792076] RSP: 002b:00007ffeb42ebd38 EFLAGS: 00000207 ORIG_RAX: 000000000000002f
[   40.799750] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe99
[   40.806986] RDX: 0000000000000000 RSI: 0000000020d63fc8 RDI: 0000000000000004
[   40.814225] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
[   40.821463] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401800
[   40.828701] R13: 0000000000401890 R14: 0000000000000000 R15: 0000000000000000
[   40.836046] BUG: unable to handle kernel NULL pointer dereference at 000000002fd59d9e
[   40.844000] IP: kfree+0xb2/0x250
[   40.847333] PGD 1cb6a6067 P4D 1cb6a6067 PUD 1cb689067 PMD 0 
[   40.853104] Oops: 0000 [#1] SMP KASAN
[   40.856869] Dumping ftrace buffer:
[   40.860371]    (ftrace buffer empty)
[   40.864062] Modules linked in:
[   40.867228] CPU: 1 PID: 3084 Comm: syzkaller250371 Not tainted 4.15.0-rc1-mm1+ #29
[   40.874895] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   40.884215] task: 00000000b849d719 task.stack: 00000000d989d873
[   40.890239] RIP: 0010:kfree+0xb2/0x250
[   40.894088] RSP: 0018:ffff8801cb587780 EFLAGS: 00010046
[   40.899414] RAX: 0000000000000000 RBX: ffff8801cb587948 RCX: ffffffffffffffff
[   40.906650] RDX: ffffea00072d61c0 RSI: 0000000000000000 RDI: ffff8801cb587948
[   40.913884] RBP: ffff8801cb5877a0 R08: 1ffff100396b0ea2 R09: 0000000000000000
[   40.921121] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000282
[   40.928358] R13: 0000000000000000 R14: ffff8801cb587948 R15: ffff8801cb5878b0
[   40.935593] FS:  0000000001d0a880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
[   40.943782] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   40.949628] CR2: 0000000000000074 CR3: 00000001cc2b6000 CR4: 00000000001406e0
[   40.956868] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   40.964112] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   40.971351] Call Trace:
[   40.973917]  blkcipher_walk_done+0x72b/0xde0
[   40.978297]  encrypt+0x50a/0xaf0
[   40.982418]  ? salsa20_encrypt_bytes+0x300/0x300
[   40.987148]  ? salsa20_encrypt_bytes+0x300/0x300
[   40.991870]  skcipher_decrypt_blkcipher+0x213/0x310
[   40.996852]  ? skcipher_decrypt_blkcipher+0x213/0x310
[   41.002024]  ? sock_kmalloc+0x11f/0x190
[   41.005967]  ? skcipher_encrypt_blkcipher+0x310/0x310
[   41.011122]  ? lock_sock_nested+0x91/0x110
[   41.015322]  ? memset+0x31/0x40
[   41.018569]  skcipher_recvmsg+0xa54/0xf20
[   41.022686]  ? skcipher_release+0x50/0x50
[   41.026800]  ? selinux_socket_recvmsg+0x36/0x40
[   41.031432]  ? security_socket_recvmsg+0x91/0xc0
[   41.036153]  ? skcipher_release+0x50/0x50
[   41.040264]  sock_recvmsg+0xc9/0x110
[   41.043940]  ? __sock_recv_wifi_status+0x210/0x210
[   41.048835]  ___sys_recvmsg+0x29b/0x630
[   41.052778]  ? ___sys_sendmsg+0x8a0/0x8a0
[   41.056900]  ? __handle_mm_fault+0x3e60/0x3e60
[   41.061455]  ? vmacache_find+0x5f/0x280
[   41.065397]  ? up_read+0x1a/0x40
[   41.068728]  ? __do_page_fault+0x3d6/0xc90
[   41.072927]  ? fd_install+0x4d/0x60
[   41.076524]  ? __fdget+0x18/0x20
[   41.079855]  __sys_recvmsg+0xe2/0x210
[   41.083618]  ? __sys_recvmsg+0xe2/0x210
[   41.087559]  ? SyS_sendmmsg+0x60/0x60
[   41.091325]  ? __do_page_fault+0xc90/0xc90
[   41.095533]  ? SyS_setsockopt+0x215/0x360
[   41.099650]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   41.104635]  SyS_recvmsg+0x2d/0x50
[   41.108144]  entry_SYSCALL_64_fastpath+0x1f/0x96
[   41.112865] RIP: 0033:0x43fe99
[   41.116022] RSP: 002b:00007ffeb42ebd38 EFLAGS: 00000207 ORIG_RAX: 000000000000002f
[   41.123696] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe99
[   41.130932] RDX: 0000000000000000 RSI: 0000000020d63fc8 RDI: 0000000000000004
[   41.138166] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
[   41.145402] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401800
[   41.152640] R13: 0000000000401890 R14: 0000000000000000 R15: 0000000000000000
[   41.159884] 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 25 52 af ff 48 89 de 4c 89 ef 4c 8b 75 08 e8 76 
[   41.178951] RIP: kfree+0xb2/0x250 RSP: ffff8801cb587780
[   41.184287] CR2: 0000000000000074
[   41.187708] ---[ end trace fab8f246a3feffa1 ]---
[   41.192428] Kernel panic - not syncing: Fatal exception in interrupt
[   41.198916] Dumping ftrace buffer:
[   41.202421]    (ftrace buffer empty)
[   41.206099] Kernel Offset: disabled
[   41.209694] Rebooting in 86400 seconds..