[[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[ 9.144368] rsyslogd (2922) used greatest stack depth: 15544 bytes left
[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added 'ci-upstream-next-kasan-gce-6,10.128.0.34' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 32.600165]
[ 32.600511] =============================
[ 32.601186] WARNING: suspicious RCU usage
[ 32.601766] 4.14.0-next-20171124+ #51 Not tainted
[ 32.602428] -----------------------------
[ 32.602996] ./include/trace/events/kmem.h:142 suspicious rcu_dereference_check() usage!
[ 32.604150]
[ 32.604150] other info that might help us debug this:
[ 32.604150]
[ 32.605245]
[ 32.605245] rcu_scheduler_active = 2, debug_locks = 1
[ 32.606305] 1 lock held by syzkaller632005/3049:
[ 32.607032] #0: (sk_lock-AF_ALG){+.+.}, at: [<ffffffff823a11f2>] af_alg_wait_for_data+0x2f2/0x650
[ 32.608293]
[ 32.608293] stack backtrace:
[ 32.608894] CPU: 0 PID: 3049 Comm: syzkaller632005 Not tainted 4.14.0-next-20171124+ #51
[ 32.609983] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 32.611218] Call Trace:
[ 32.611574] dump_stack+0x194/0x257
[ 32.612064] ? arch_local_irq_restore+0x53/0x53
[ 32.612718] lockdep_rcu_suspicious+0x123/0x170
[ 32.613340] ? blkcipher_walk_done+0x72b/0xde0
[ 32.613953] kfree+0x20a/0x250
[ 32.614388] blkcipher_walk_done+0x72b/0xde0
[ 32.614986] encrypt+0x20e/0x540
[ 32.615444] ? salsa20_ivsetup+0x40/0x40
[ 32.616005] ? salsa20_ivsetup+0x40/0x40
[ 32.616549] skcipher_decrypt_blkcipher+0x213/0x310
[ 32.617213] ? skcipher_decrypt_blkcipher+0x213/0x310
[ 32.617903] ? sock_kmalloc+0x11f/0x190
[ 32.618438] ? skcipher_encrypt_blkcipher+0x310/0x310
[ 32.619125] ? lock_sock_nested+0x91/0x110
[ 32.619694] ? memset+0x31/0x40
[ 32.620143] skcipher_recvmsg+0xb06/0xf30
[ 32.620713] ? skcipher_sendpage_nokey+0xa0/0xa0
[ 32.625442] ? skcipher_check_key.isra.4+0x61/0x200
[ 32.630428] skcipher_recvmsg_nokey+0x60/0x80
[ 32.634900] ? skcipher_recvmsg+0xf30/0xf30
[ 32.639188] sock_recvmsg+0xc9/0x110
[ 32.642866] ? __sock_recv_wifi_status+0x210/0x210
[ 32.647763] ___sys_recvmsg+0x29b/0x630
[ 32.651710] ? ___sys_sendmsg+0x8a0/0x8a0
[ 32.655843] ? fget_raw+0x20/0x20
[ 32.659264] ? __handle_mm_fault+0x3dd0/0x3dd0
[ 32.663811] ? vmacache_find+0x5f/0x280
[ 32.667757] ? up_read+0x1a/0x40
[ 32.671090] ? __do_page_fault+0x3d6/0xc90
[ 32.675289] ? trace_hardirqs_on+0xd/0x10
[ 32.679410] ? __fdget+0x18/0x20
[ 32.682746] __sys_recvmsg+0xe2/0x210
[ 32.686510] ? __sys_recvmsg+0xe2/0x210
[ 32.690453] ? SyS_sendmmsg+0x60/0x60
[ 32.694224] ? __do_page_fault+0xc90/0xc90
[ 32.698426] ? SyS_setsockopt+0x215/0x360
[ 32.702553] ? trace_hardirqs_on_caller+0x421/0x5c0
[ 32.707541] SyS_recvmsg+0x2d/0x50
[ 32.711055] entry_SYSCALL_64_fastpath+0x1f/0x96
[ 32.715774] RIP: 0033:0x43fe59
[ 32.718929] RSP: 002b:00007fff5248aa88 EFLAGS: 00000217 ORIG_RAX: 000000000000002f
[ 32.726603] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe59
[ 32.733836] RDX: 0000000000002000 RSI: 0000000020222fc8 RDI: 0000000000000004
[ 32.741072] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
[ 32.748307] R10: 0000000000000010 R11: 0000000000000217 R12: 00000000004017c0
[ 32.755545] R13: 0000000000401850 R14: 0000000000000000 R15: 0000000000000000
[ 32.762870] BUG: unable to handle kernel NULL pointer dereference at 0000000000000074
[ 32.770817] IP: kfree+0xb2/0x250
[ 32.774143] PGD 1cddc8067 P4D 1cddc8067 PUD 1ce910067 PMD 0
[ 32.779908] Oops: 0000 [#1] SMP KASAN
[ 32.783674] Dumping ftrace buffer:
[ 32.787174] (ftrace buffer empty)
[ 32.790846] Modules linked in:
[ 32.794007] CPU: 0 PID: 3049 Comm: syzkaller632005 Not tainted 4.14.0-next-20171124+ #51
[ 32.802193] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 32.811510] task: ffff8801cd38e4c0 task.stack: ffff8801cd2a0000
[ 32.817535] RIP: 0010:kfree+0xb2/0x250
[ 32.821382] RSP: 0018:ffff8801cd2a7750 EFLAGS: 00010046
[ 32.826707] RAX: 0000000000000000 RBX: ffff8801cd2a7918 RCX: ffffffffffffffff
[ 32.833940] RDX: ffffea000734a9c0 RSI: 0000000000000000 RDI: ffff8801cd2a7918
[ 32.841177] RBP: ffff8801cd2a7770 R08: 1ffff10039a54e9c R09: 0000000000000000
[ 32.848410] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286
[ 32.855643] R13: 0000000000000000 R14: ffff8801cd2a7918 R15: ffff8801cd2a7880
[ 32.862877] FS: 00000000014e1880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
[ 32.871068] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 32.876913] CR2: 0000000000000074 CR3: 00000001cdd44000 CR4: 00000000001406f0
[ 32.884149] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 32.891385] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 32.898618] Call Trace:
[ 32.901173] blkcipher_walk_done+0x72b/0xde0
[ 32.905551] encrypt+0x20e/0x540
[ 32.908884] ? salsa20_ivsetup+0x40/0x40
[ 32.912921] ? salsa20_ivsetup+0x40/0x40
[ 32.916953] skcipher_decrypt_blkcipher+0x213/0x310
[ 32.921931] ? skcipher_decrypt_blkcipher+0x213/0x310
[ 32.927085] ? sock_kmalloc+0x11f/0x190
[ 32.931023] ? skcipher_encrypt_blkcipher+0x310/0x310
[ 32.936176] ? lock_sock_nested+0x91/0x110
[ 32.940392] ? memset+0x31/0x40
[ 32.943645] skcipher_recvmsg+0xb06/0xf30
[ 32.947770] ? skcipher_sendpage_nokey+0xa0/0xa0
[ 32.952893] ? skcipher_check_key.isra.4+0x61/0x200
[ 32.957874] skcipher_recvmsg_nokey+0x60/0x80
[ 32.962341] ? skcipher_recvmsg+0xf30/0xf30
[ 32.966628] sock_recvmsg+0xc9/0x110
[ 32.970303] ? __sock_recv_wifi_status+0x210/0x210
[ 32.975202] ___sys_recvmsg+0x29b/0x630
[ 32.979143] ? ___sys_sendmsg+0x8a0/0x8a0
[ 32.983264] ? fget_raw+0x20/0x20
[ 32.986681] ? __handle_mm_fault+0x3dd0/0x3dd0
[ 32.991225] ? vmacache_find+0x5f/0x280
[ 32.995166] ? up_read+0x1a/0x40
[ 32.998495] ? __do_page_fault+0x3d6/0xc90
[ 33.002691] ? trace_hardirqs_on+0xd/0x10
[ 33.006803] ? __fdget+0x18/0x20
[ 33.010134] __sys_recvmsg+0xe2/0x210
[ 33.013896] ? __sys_recvmsg+0xe2/0x210
[ 33.017834] ? SyS_sendmmsg+0x60/0x60
[ 33.021599] ? __do_page_fault+0xc90/0xc90
[ 33.025798] ? SyS_setsockopt+0x215/0x360
[ 33.029914] ? trace_hardirqs_on_caller+0x421/0x5c0
[ 33.034900] SyS_recvmsg+0x2d/0x50
[ 33.038404] entry_SYSCALL_64_fastpath+0x1f/0x96
[ 33.043124] RIP: 0033:0x43fe59
[ 33.046277] RSP: 002b:00007fff5248aa88 EFLAGS: 00000217 ORIG_RAX: 000000000000002f
[ 33.053948] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe59
[ 33.061182] RDX: 0000000000002000 RSI: 0000000020222fc8 RDI: 0000000000000004
[ 33.068416] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
[ 33.075650] R10: 0000000000000010 R11: 0000000000000217 R12: 00000000004017c0
[ 33.082883] R13: 0000000000401850 R14: 0000000000000000 R15: 0000000000000000
[ 33.090122] 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 a5 59 af ff 48 89 de 4c 89 ef 4c 8b 75 08 e8 76
[ 33.109184] RIP: kfree+0xb2/0x250 RSP: ffff8801cd2a7750
[ 33.114506] CR2: 0000000000000074
[ 33.117925] ---[ end trace ef5cc6f059e06a5f ]---
[ 33.122647] Kernel panic - not syncing: Fatal exception in interrupt
[ 33.129130] Dumping ftrace buffer:
[ 33.132635] (ftrace buffer empty)
[ 33.136308] Kernel Offset: disabled
[ 33.139899] Rebooting in 86400 seconds..