[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.706444][ T27] audit: type=1800 audit(1580948593.781:25): pid=9589 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 85.726114][ T27] audit: type=1800 audit(1580948593.781:26): pid=9589 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 85.753535][ T27] audit: type=1800 audit(1580948593.781:27): pid=9589 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.0.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 97.153946][ T9740] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready [ 97.175030][ T9740] general protection fault, probably for non-canonical address 0xdffffc0000000056: 0000 [#1] PREEMPT SMP KASAN [ 97.186750][ T9740] KASAN: null-ptr-deref in range [0x00000000000002b0-0x00000000000002b7] [ 97.195166][ T9740] CPU: 1 PID: 9740 Comm: syz-executor052 Not tainted 5.5.0-syzkaller #0 [ 97.203482][ T9740] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.213538][ T9740] RIP: 0010:inet6_set_link_af+0x66e/0xae0 [ 97.219234][ T9740] Code: 38 d0 7f 08 84 c0 0f 85 20 03 00 00 48 8d bb b0 02 00 00 45 0f b6 64 24 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 1a 03 00 00 44 89 a3 b0 02 00 [ 97.238856][ T9740] RSP: 0018:ffffc9000451ed30 EFLAGS: 00010206 [ 97.244900][ T9740] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86df29a6 [ 97.252887][ T9740] RDX: 0000000000000056 RSI: ffffffff86df2e74 RDI: 00000000000002b0 [ 97.260870][ T9740] RBP: ffffc9000451ee60 R08: ffff8880a85263c0 R09: ffffc9000451eda0 [ 97.268840][ T9740] R10: fffff520008a3dbc R11: ffffc9000451ede7 R12: 0000000000000000 [ 97.276800][ T9740] R13: 0000000000000000 R14: ffff888093e82024 R15: dffffc0000000000 [ 97.284752][ T9740] FS: 0000000000000000(0000) GS:ffff8880ae900000(0063) knlGS:00000000087be840 [ 97.293662][ T9740] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 97.300228][ T9740] CR2: 000055ff7c9da0f0 CR3: 0000000090285000 CR4: 00000000001406e0 [ 97.308207][ T9740] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.316172][ T9740] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.324123][ T9740] Call Trace: [ 97.327412][ T9740] ? addrconf_sysctl_disable+0x700/0x700 [ 97.333040][ T9740] ? mark_held_locks+0xf0/0xf0 [ 97.337802][ T9740] ? lock_acquire+0x190/0x410 [ 97.342458][ T9740] ? do_setlink+0x2961/0x3720 [ 97.347115][ T9740] do_setlink+0x2a9f/0x3720 [ 97.351599][ T9740] ? do_setlink+0x2a9f/0x3720 [ 97.356258][ T9740] ? rtnl_getlink+0xb50/0xb50 [ 97.360912][ T9740] ? __kasan_check_read+0x11/0x20 [ 97.365911][ T9740] ? __lock_acquire+0x8a0/0x4a00 [ 97.370822][ T9740] ? mark_lock+0xc2/0x1220 [ 97.375215][ T9740] ? __nla_parse+0x43/0x60 [ 97.379612][ T9740] ? validate_linkmsg+0x4be/0x7d0 [ 97.384622][ T9740] ? find_held_lock+0x35/0x130 [ 97.389374][ T9740] ? validate_linkmsg+0x4be/0x7d0 [ 97.394375][ T9740] ? lock_downgrade+0x920/0x920 [ 97.399201][ T9740] ? __kasan_check_read+0x11/0x20 [ 97.404201][ T9740] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.410415][ T9740] __rtnl_newlink+0xdd1/0x1790 [ 97.415152][ T9740] ? lock_downgrade+0x920/0x920 [ 97.419990][ T9740] ? __check_heap_object+0x93/0xb3 [ 97.425077][ T9740] ? rtnl_link_unregister+0x250/0x250 [ 97.430423][ T9740] ? stack_depot_save+0x25a/0x450 [ 97.435422][ T9740] ? mark_lock+0xc2/0x1220 [ 97.439835][ T9740] ? mark_held_locks+0xa4/0xf0 [ 97.444578][ T9740] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 97.450357][ T9740] ? stack_depot_save+0x25a/0x450 [ 97.455356][ T9740] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 97.461136][ T9740] ? lockdep_hardirqs_on+0x421/0x5e0 [ 97.466411][ T9740] ? trace_hardirqs_on+0x67/0x240 [ 97.471416][ T9740] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 97.477198][ T9740] ? stack_depot_save+0x25a/0x450 [ 97.482212][ T9740] ? save_stack+0x5c/0x90 [ 97.486517][ T9740] ? save_stack+0x23/0x90 [ 97.490820][ T9740] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 97.496621][ T9740] ? rtnl_newlink+0x4b/0xa0 [ 97.501100][ T9740] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 97.506618][ T9740] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 97.512571][ T9740] ? __kasan_kmalloc.constprop.0+0x30/0xe0 [ 97.518353][ T9740] ? kmem_cache_alloc_trace+0x397/0x790 [ 97.523895][ T9740] rtnl_newlink+0x69/0xa0 [ 97.528203][ T9740] ? __rtnl_newlink+0x1790/0x1790 [ 97.533215][ T9740] rtnetlink_rcv_msg+0x45e/0xaf0 [ 97.538131][ T9740] ? rtnl_bridge_getlink+0x910/0x910 [ 97.543393][ T9740] ? lock_downgrade+0x920/0x920 [ 97.548224][ T9740] ? netlink_deliver_tap+0x226/0xbf0 [ 97.553489][ T9740] ? find_held_lock+0x35/0x130 [ 97.558233][ T9740] netlink_rcv_skb+0x177/0x450 [ 97.562974][ T9740] ? rtnl_bridge_getlink+0x910/0x910 [ 97.568234][ T9740] ? netlink_ack+0xb50/0xb50 [ 97.572799][ T9740] ? __kasan_check_read+0x11/0x20 [ 97.577806][ T9740] ? netlink_deliver_tap+0x248/0xbf0 [ 97.583070][ T9740] rtnetlink_rcv+0x1d/0x30 [ 97.587465][ T9740] netlink_unicast+0x59e/0x7e0 [ 97.592226][ T9740] ? netlink_attachskb+0x870/0x870 [ 97.597319][ T9740] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 97.603018][ T9740] ? __check_object_size+0x3d/0x437 [ 97.608208][ T9740] netlink_sendmsg+0x91c/0xea0 [ 97.612952][ T9740] ? netlink_unicast+0x7e0/0x7e0 [ 97.617869][ T9740] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 97.623401][ T9740] ? apparmor_socket_sendmsg+0x2a/0x30 [ 97.628843][ T9740] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.635081][ T9740] ? security_socket_sendmsg+0x8d/0xc0 [ 97.640517][ T9740] ? netlink_unicast+0x7e0/0x7e0 [ 97.645453][ T9740] sock_sendmsg+0xd7/0x130 [ 97.649860][ T9740] ____sys_sendmsg+0x753/0x880 [ 97.654601][ T9740] ? kernel_sendmsg+0x50/0x50 [ 97.659274][ T9740] ___sys_sendmsg+0x100/0x170 [ 97.663931][ T9740] ? sendmsg_copy_msghdr+0x70/0x70 [ 97.669019][ T9740] ? do_huge_pmd_anonymous_page+0xceb/0x1a50 [ 97.674984][ T9740] ? mark_lock+0xc2/0x1220 [ 97.679379][ T9740] ? prep_transhuge_page+0xa0/0xa0 [ 97.684467][ T9740] ? do_page_fault+0x579/0x12e1 [ 97.689300][ T9740] ? find_held_lock+0x35/0x130 [ 97.694042][ T9740] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.700259][ T9740] ? __fget_light+0x1ad/0x270 [ 97.704941][ T9740] ? __fdget+0x1b/0x20 [ 97.708987][ T9740] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 97.715216][ T9740] __sys_sendmsg+0x105/0x1d0 [ 97.719795][ T9740] ? __sys_sendmsg_sock+0xc0/0xc0 [ 97.724809][ T9740] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 97.730290][ T9740] ? do_fast_syscall_32+0xd1/0xe16 [ 97.735378][ T9740] ? entry_SYSENTER_compat+0x70/0x7f [ 97.740640][ T9740] ? do_fast_syscall_32+0xd1/0xe16 [ 97.745736][ T9740] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 97.751171][ T9740] do_fast_syscall_32+0x27b/0xe16 [ 97.756176][ T9740] entry_SYSENTER_compat+0x70/0x7f [ 97.761275][ T9740] RIP: 0023:0xf7f2be39 [ 97.765318][ T9740] Code: 1d 00 00 00 89 d3 5b 5e 5d c3 8b 04 24 c3 8b 1c 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 97.784896][ T9740] RSP: 002b:00000000fff1a5cc EFLAGS: 00000282 ORIG_RAX: 0000000000000172 [ 97.793278][ T9740] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000080 [ 97.801224][ T9740] RDX: 0000000000000000 RSI: 00000000080ea078 RDI: 00000000fff1a620 [ 97.809180][ T9740] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 97.817125][ T9740] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 97.825071][ T9740] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 97.833034][ T9740] Modules linked in: [ 97.856220][ T9740] ---[ end trace 97bd97cbb2d601bd ]--- [ 97.861683][ T9740] RIP: 0010:inet6_set_link_af+0x66e/0xae0 [ 97.867429][ T9740] Code: 38 d0 7f 08 84 c0 0f 85 20 03 00 00 48 8d bb b0 02 00 00 45 0f b6 64 24 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 1a 03 00 00 44 89 a3 b0 02 00 [ 97.887065][ T9740] RSP: 0018:ffffc9000451ed30 EFLAGS: 00010206 [ 97.893108][ T9740] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86df29a6 [ 97.901171][ T9740] RDX: 0000000000000056 RSI: ffffffff86df2e74 RDI: 00000000000002b0 [ 97.909162][ T9740] RBP: ffffc9000451ee60 R08: ffff8880a85263c0 R09: ffffc9000451eda0 [ 97.917167][ T9740] R10: fffff520008a3dbc R11: ffffc9000451ede7 R12: 0000000000000000 [ 97.925207][ T9740] R13: 0000000000000000 R14: ffff888093e82024 R15: dffffc0000000000 [ 97.933167][ T9740] FS: 0000000000000000(0000) GS:ffff8880ae900000(0063) knlGS:00000000087be840 [ 97.942117][ T9740] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 97.948714][ T9740] CR2: 000055ff7c9da0f0 CR3: 0000000090285000 CR4: 00000000001406e0 [ 97.956737][ T9740] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.964730][ T9740] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.972686][ T9740] Kernel panic - not syncing: Fatal exception [ 97.979983][ T9740] Kernel Offset: disabled [ 97.984307][ T9740] Rebooting in 86400 seconds..