[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 57.962177][ T26] audit: type=1800 audit(1580974351.629:25): pid=8684 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.982042][ T26] audit: type=1800 audit(1580974351.629:26): pid=8684 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.041640][ T26] audit: type=1800 audit(1580974351.639:27): pid=8684 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] 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 '10.128.0.142' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.558768][ T8836] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready [ 68.580035][ T8836] general protection fault, probably for non-canonical address 0xdffffc0000000056: 0000 [#1] PREEMPT SMP KASAN [ 68.591776][ T8836] KASAN: null-ptr-deref in range [0x00000000000002b0-0x00000000000002b7] [ 68.600172][ T8836] CPU: 1 PID: 8836 Comm: syz-executor016 Not tainted 5.5.0-syzkaller #0 [ 68.608469][ T8836] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.618558][ T8836] RIP: 0010:inet6_set_link_af+0x23c/0xac0 [ 68.624256][ T8836] Code: 64 fa 48 83 c3 04 48 89 d8 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 88 06 00 00 0f b6 1b 49 81 c4 b0 02 00 00 4c 89 e0 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 85 06 00 00 41 89 1c 24 eb 2c 80 3d ce 86 [ 68.643838][ T8836] RSP: 0018:ffffc90002147170 EFLAGS: 00010206 [ 68.649917][ T8836] RAX: 0000000000000056 RBX: 0000000000000000 RCX: ffff8880978f02c0 [ 68.657919][ T8836] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc900021471e0 [ 68.665870][ T8836] RBP: ffffc90002147240 R08: ffffffff8712007f R09: ffffc900021471a0 [ 68.673829][ T8836] R10: fffff52000428e3d R11: 0000000000000000 R12: 00000000000002b0 [ 68.681792][ T8836] R13: dffffc0000000000 R14: ffff8880989d7024 R15: 0000000000000000 [ 68.689750][ T8836] FS: 0000000000ca1880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 68.698700][ T8836] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.705271][ T8836] CR2: 000056328052e0f0 CR3: 00000000a6d8b000 CR4: 00000000001406e0 [ 68.713220][ T8836] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.721169][ T8836] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.729136][ T8836] Call Trace: [ 68.732406][ T8836] ? trace_lock_acquire+0x15b/0x1d0 [ 68.737587][ T8836] ? __kasan_check_read+0x11/0x20 [ 68.742598][ T8836] do_setlink+0x2cbc/0x3880 [ 68.747113][ T8836] ? rcu_lock_release+0x9/0x30 [ 68.751865][ T8836] ? rcu_lock_release+0x21/0x30 [ 68.756693][ T8836] rtnl_newlink+0x10b2/0x1c00 [ 68.761412][ T8836] ? __mutex_lock_common+0x53d/0x2f30 [ 68.766780][ T8836] ? rtnetlink_rcv_msg+0x83c/0xd40 [ 68.771871][ T8836] ? rtnl_setlink+0x490/0x490 [ 68.776532][ T8836] rtnetlink_rcv_msg+0x889/0xd40 [ 68.781474][ T8836] ? rcu_lock_release+0x9/0x30 [ 68.786263][ T8836] netlink_rcv_skb+0x19e/0x3e0 [ 68.791015][ T8836] ? rtnetlink_bind+0x80/0x80 [ 68.795675][ T8836] rtnetlink_rcv+0x1c/0x20 [ 68.800076][ T8836] netlink_unicast+0x766/0x920 [ 68.804842][ T8836] netlink_sendmsg+0xa2b/0xd40 [ 68.809638][ T8836] ? netlink_getsockopt+0x9f0/0x9f0 [ 68.814818][ T8836] ____sys_sendmsg+0x4f7/0x7f0 [ 68.819646][ T8836] __sys_sendmsg+0x1ed/0x290 [ 68.824222][ T8836] ? handle_mm_fault+0x173a/0x2900 [ 68.829319][ T8836] ? __kasan_check_write+0x14/0x20 [ 68.834435][ T8836] ? __up_read+0x231/0x740 [ 68.838837][ T8836] ? check_preemption_disabled+0xb4/0x260 [ 68.844535][ T8836] ? debug_smp_processor_id+0x9/0x20 [ 68.849818][ T8836] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 68.855308][ T8836] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 68.861015][ T8836] ? do_syscall_64+0x1d/0x1c0 [ 68.865673][ T8836] __x64_sys_sendmsg+0x7f/0x90 [ 68.870408][ T8836] do_syscall_64+0xf7/0x1c0 [ 68.874891][ T8836] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.880774][ T8836] RIP: 0033:0x4402e9 [ 68.884718][ T8836] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 68.904400][ T8836] RSP: 002b:00007ffd31ff9958 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 68.912794][ T8836] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402e9 [ 68.920750][ T8836] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 68.928761][ T8836] RBP: 00000000006ca018 R08: 0000000000000008 R09: 00000000004002c8 [ 68.936718][ T8836] R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000401b70 [ 68.944736][ T8836] R13: 0000000000401c00 R14: 0000000000000000 R15: 0000000000000000 [ 68.952722][ T8836] Modules linked in: [ 68.974237][ T8836] ---[ end trace d2f455af5f18d085 ]--- [ 68.979740][ T8836] RIP: 0010:inet6_set_link_af+0x23c/0xac0 [ 68.985440][ T8836] Code: 64 fa 48 83 c3 04 48 89 d8 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 88 06 00 00 0f b6 1b 49 81 c4 b0 02 00 00 4c 89 e0 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 85 06 00 00 41 89 1c 24 eb 2c 80 3d ce 86 [ 69.005099][ T8836] RSP: 0018:ffffc90002147170 EFLAGS: 00010206 [ 69.011253][ T8836] RAX: 0000000000000056 RBX: 0000000000000000 RCX: ffff8880978f02c0 [ 69.019262][ T8836] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc900021471e0 [ 69.027272][ T8836] RBP: ffffc90002147240 R08: ffffffff8712007f R09: ffffc900021471a0 [ 69.035266][ T8836] R10: fffff52000428e3d R11: 0000000000000000 R12: 00000000000002b0 [ 69.043257][ T8836] R13: dffffc0000000000 R14: ffff8880989d7024 R15: 0000000000000000 [ 69.051297][ T8836] FS: 0000000000ca1880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 69.060292][ T8836] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.066848][ T8836] CR2: 000056328052e0f0 CR3: 00000000a6d8b000 CR4: 00000000001406e0 [ 69.074847][ T8836] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.082834][ T8836] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.090825][ T8836] Kernel panic - not syncing: Fatal exception [ 69.098382][ T8836] Kernel Offset: disabled [ 69.102724][ T8836] Rebooting in 86400 seconds..