[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 17.791927] random: sshd: uninitialized urandom read (32 bytes read, 31 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.194201] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 20.472404] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 21.375446] random: sshd: uninitialized urandom read (32 bytes read, 100 bits of entropy available) [ 32.276747] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available) Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts. [ 37.818205] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available) executing program [ 37.900762] kasan: CONFIG_KASAN_INLINE enabled [ 37.905185] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.918027] Dumping ftrace buffer: [ 37.921537] (ftrace buffer empty) [ 37.925220] Modules linked in: [ 37.928500] CPU: 1 PID: 3630 Comm: syzkaller653150 Not tainted 4.4.125-g38f41ec #63 [ 37.936262] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.945586] task: ffff8800b21c6000 task.stack: ffff8801cd480000 [ 37.951611] RIP: 0010:[] [] __list_del_entry+0x86/0x1d0 [ 37.960295] RSP: 0018:ffff8801cd4875a8 EFLAGS: 00010246 [ 37.965713] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff8801cdb89610 [ 37.972958] RDX: 0000000000000000 RSI: ffffffff851beae0 RDI: ffff8801cdb89618 [ 37.980211] RBP: ffff8801cd4875c0 R08: 0000000000000001 R09: 0000000000000000 [ 37.980213] R10: 0000000000000001 R11: 1ffff10039a90e84 R12: 0000000000000000 [ 37.980215] R13: ffff8801cdb895b9 R14: ffff8801cdb89638 R15: 00000000ffffffde [ 37.980219] FS: 0000000000e64880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 37.980221] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.980223] CR2: 00000000200007c0 CR3: 00000001d2176000 CR4: 0000000000160670 [ 37.980229] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.980230] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.980232] Stack: [ 37.980238] ffff8801cdb89638 ffff8801cdb89610 ffffffff846f2b80 ffff8801cd4875d8 [ 37.980242] ffffffff81d66b5d ffff8801cdb89610 ffff8801cd4875f8 ffffffff832b6fde [ 37.980246] ffff8801d3e8b300 ffff8801cdb89610 ffff8801cd487618 ffffffff832d6533 [ 37.980247] Call Trace: [ 37.980259] [] list_del+0xd/0x70 [ 37.980267] [] xfrm_state_walk_done+0x6e/0xa0 [ 37.980272] [] xfrm_dump_sa_done+0x73/0xa0 [ 37.980275] [] ? xfrm_dump_policy_start+0x20/0x20 [ 37.980282] [] netlink_dump+0x871/0xb40 [ 37.980286] [] __netlink_dump_start+0x52e/0x7c0 [ 37.980290] [] ? __netlink_ns_capable+0xe1/0x120 [ 37.980294] [] xfrm_user_rcv_msg+0x5bd/0x6b0 [ 37.980297] [] ? xfrm_user_rcv_msg+0x6b0/0x6b0 [ 37.980301] [] ? xfrm_dump_sa_done+0xa0/0xa0 [ 37.980307] [] ? retint_kernel+0x2d/0x2d [ 37.980311] [] ? xfrm_user_rcv_msg+0x6b0/0x6b0 [ 37.980315] [] ? xfrm_dump_policy_start+0x20/0x20 [ 37.980326] [] ? mark_held_locks+0xaf/0x100 [ 37.980330] [] ? mutex_lock_nested+0x5d4/0x850 [ 37.980334] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 37.980337] [] ? mutex_lock_nested+0x560/0x850 [ 37.980340] [] ? xfrm_netlink_rcv+0x60/0x90 [ 37.980344] [] ? netlink_lookup+0xee/0x740 [ 37.980348] [] netlink_rcv_skb+0x13e/0x370 [ 37.980352] [] ? xfrm_dump_sa_done+0xa0/0xa0 [ 37.980355] [] xfrm_netlink_rcv+0x6f/0x90 [ 37.980359] [] netlink_unicast+0x522/0x760 [ 37.980362] [] ? netlink_unicast+0x44f/0x760 [ 37.980366] [] ? netlink_attachskb+0x6c0/0x6c0 [ 37.980370] [] netlink_sendmsg+0x8e8/0xc50 [ 37.980374] [] ? netlink_unicast+0x760/0x760 [ 37.980380] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 37.980386] [] ? security_socket_sendmsg+0x89/0xb0 [ 37.980389] [] ? netlink_unicast+0x760/0x760 [ 37.980396] [] sock_sendmsg+0xca/0x110 [ 37.980399] [] ___sys_sendmsg+0x6c1/0x7c0 [ 37.980403] [] ? copy_msghdr_from_user+0x550/0x550 [ 37.980407] [] ? check_preemption_disabled+0x3b/0x200 [ 37.980414] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 37.980418] [] ? _raw_spin_unlock+0x2c/0x50 [ 37.980422] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 37.980428] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 37.980434] [] ? __fget_light+0xa3/0x1e0 [ 37.980437] [] ? __fdget+0x18/0x20 [ 37.980441] [] __sys_sendmsg+0xd3/0x190 [ 37.980445] [] ? SyS_shutdown+0x1b0/0x1b0 [ 37.980451] [] ? vmacache_update+0xfe/0x130 [ 37.980456] [] ? __do_page_fault+0x380/0xa00 [ 37.980460] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 37.980464] [] SyS_sendmsg+0x2d/0x50 [ 37.980468] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 37.980516] Code: c4 0f 84 94 00 00 00 48 b8 00 02 00 00 00 00 ad de 48 39 c3 0f 84 a5 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 e8 00 00 00 4c 8b 03 49 39 c8 0f 85 9b 00 00 [ 37.980520] RIP [] __list_del_entry+0x86/0x1d0 [ 37.980521] RSP [ 37.980567] ---[ end trace c23176c930ae3787 ]--- [ 37.980570] Kernel panic - not syncing: Fatal exception in interrupt [ 37.980927] Dumping ftrace buffer: [ 37.980931] (ftrace buffer empty) [ 37.980933] Kernel Offset: disabled [ 38.402011] Rebooting in 86400 seconds..