[ 43.110947] audit: type=1800 audit(1556023880.823:29): pid=7769 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 43.159580] audit: type=1800 audit(1556023880.823:30): pid=7769 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?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 '10.128.0.88' (ECDSA) to the list of known hosts. syzkaller login: [ 51.643912] kauditd_printk_skb: 5 callbacks suppressed [ 51.643929] audit: type=1400 audit(1556023889.353:36): avc: denied { map } for pid=7951 comm="syz-executor394" path="/root/syz-executor394564011" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 51.670805] IPVS: ftp: loaded support on port[0] = 21 [ 51.742083] chnl_net:caif_netlink_parms(): no params data found [ 51.775537] bridge0: port 1(bridge_slave_0) entered blocking state [ 51.782254] bridge0: port 1(bridge_slave_0) entered disabled state [ 51.789669] device bridge_slave_0 entered promiscuous mode [ 51.797649] bridge0: port 2(bridge_slave_1) entered blocking state [ 51.804232] bridge0: port 2(bridge_slave_1) entered disabled state [ 51.811630] device bridge_slave_1 entered promiscuous mode [ 51.829096] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 51.838357] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 51.854500] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 51.862318] team0: Port device team_slave_0 added [ 51.867837] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 51.875072] team0: Port device team_slave_1 added [ 51.880562] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 51.887956] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 51.967517] device hsr_slave_0 entered promiscuous mode [ 52.036151] device hsr_slave_1 entered promiscuous mode [ 52.106264] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 52.113338] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 52.127862] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.134482] bridge0: port 2(bridge_slave_1) entered forwarding state [ 52.141562] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.147998] bridge0: port 1(bridge_slave_0) entered forwarding state [ 52.180852] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 52.187040] 8021q: adding VLAN 0 to HW filter on device bond0 [ 52.195240] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 52.204090] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 52.223723] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.231860] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.239782] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 52.250196] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 52.256782] 8021q: adding VLAN 0 to HW filter on device team0 [ 52.266649] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 52.274524] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.280969] bridge0: port 1(bridge_slave_0) entered forwarding state [ 52.290280] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 52.298558] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.304940] bridge0: port 2(bridge_slave_1) entered forwarding state [ 52.321023] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 52.329312] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 52.340686] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 52.352050] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 52.362518] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 52.372500] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready executing program [ 52.378689] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 52.392381] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 52.402699] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 52.416620] kasan: CONFIG_KASAN_INLINE enabled [ 52.421311] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 52.428757] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 52.434999] CPU: 0 PID: 7958 Comm: syz-executor394 Not tainted 4.19.36 #4 [ 52.441918] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.451365] RIP: 0010:xfrmi_decode_session+0xeb/0x630 [ 52.456545] Code: 7c e7 10 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 fd 04 00 00 48 b8 00 00 00 00 00 fc ff df 4f 8b 64 e7 10 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 2c 05 00 00 4d 8b 3c 24 e8 72 dc 66 fb e8 7d 33 [ 52.475473] RSP: 0018:ffff8880978cf178 EFLAGS: 00010246 [ 52.480834] RAX: dffffc0000000000 RBX: ffff8880900f0e80 RCX: ffffffff85ed5dbe [ 52.488100] RDX: 0000000000000000 RSI: ffffffff85f21105 RDI: ffff888093aa6788 [ 52.495369] RBP: ffff8880978cf1a0 R08: ffff888096706300 R09: ffffed1015d04733 [ 52.502832] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000000 [ 52.510102] R13: 0000000000000037 R14: ffff8880900f0e90 R15: ffff888093aa6780 [ 52.517366] FS: 00007f8980e29700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 52.525583] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.531459] CR2: 00007f8980e28e78 CR3: 000000009e402000 CR4: 00000000001406f0 [ 52.538752] Call Trace: [ 52.541343] __xfrm_policy_check+0x1fa/0x2560 [ 52.545842] ? kasan_check_read+0x11/0x20 [ 52.549984] ? __xfrm_route_forward+0x870/0x870 [ 52.554655] ? nf_ct_deliver_cached_events+0x216/0x6e0 [ 52.559923] ? find_held_lock+0x35/0x130 [ 52.563978] ? __lock_is_held+0xb6/0x140 [ 52.568210] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.573741] ? ip_tunnel_lookup+0xa0f/0xe00 [ 52.578095] vti_input+0x50f/0x790 [ 52.581630] vti_rcv+0x10b/0x140 [ 52.584988] xfrm4_esp_rcv+0xd8/0x240 [ 52.588796] ip_local_deliver_finish+0x284/0xc60 [ 52.593552] ip_local_deliver+0x1e9/0x520 [ 52.597702] ? ip_call_ra_chain+0x5c0/0x5c0 [ 52.602032] ? ip_sublist_rcv_finish+0x320/0x320 [ 52.606819] ? ip_rcv_finish_core.isra.0+0x805/0x1b80 [ 52.612051] ip_rcv_finish+0x1e1/0x300 [ 52.615982] ip_rcv+0xe8/0x3f0 [ 52.619181] ? ip_local_deliver+0x520/0x520 [ 52.623512] ? ip_rcv_finish_core.isra.0+0x1b80/0x1b80 [ 52.628802] ? ip_local_deliver+0x520/0x520 [ 52.633125] __netif_receive_skb_one_core+0x115/0x1a0 [ 52.638327] ? __netif_receive_skb_core+0x2f90/0x2f90 [ 52.643517] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.649052] ? check_preemption_disabled+0x48/0x290 [ 52.654100] ? lock_acquire+0x16f/0x3f0 [ 52.658071] __netif_receive_skb+0x2c/0x1d0 [ 52.662407] netif_receive_skb_internal+0x117/0x520 [ 52.667420] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 52.672984] ? dev_cpu_dead+0x920/0x920 [ 52.677479] ? eth_gro_receive+0x8a0/0x8a0 [ 52.682194] napi_gro_frags+0x623/0xa30 [ 52.693468] tun_get_user+0x2edb/0x4bb0 [ 52.697462] ? mark_held_locks+0x100/0x100 [ 52.701867] ? tun_build_skb.isra.0+0x1900/0x1900 [ 52.706704] ? tun_get+0x171/0x290 [ 52.710386] ? lock_downgrade+0x810/0x810 [ 52.714523] ? kasan_check_read+0x11/0x20 [ 52.718874] tun_chr_write_iter+0xbd/0x156 [ 52.723227] do_iter_readv_writev+0x55d/0x830 [ 52.731405] ? vfs_dedupe_file_range+0x6f0/0x6f0 [ 52.736179] ? security_file_permission+0x8f/0x230 [ 52.741225] ? rw_verify_area+0x118/0x360 [ 52.745389] do_iter_write+0x184/0x600 [ 52.749273] ? dup_iter+0x280/0x280 [ 52.752900] vfs_writev+0x1b3/0x2f0 [ 52.756611] ? vfs_iter_write+0xb0/0xb0 [ 52.760590] ? kasan_check_read+0x11/0x20 [ 52.771184] ? iterate_fd+0x360/0x360 [ 52.775020] ? selinux_file_mprotect+0x620/0x620 [ 52.779809] ? __fget_light+0x1a9/0x230 [ 52.783788] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.789328] do_writev+0xf6/0x290 [ 52.792783] ? vfs_writev+0x2f0/0x2f0 [ 52.796575] ? do_syscall_64+0x26/0x610 [ 52.800543] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.805906] ? do_syscall_64+0x26/0x610 [ 52.810357] __x64_sys_writev+0x75/0xb0 [ 52.814409] do_syscall_64+0x103/0x610 [ 52.818596] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.823783] RIP: 0033:0x4475e1 [ 52.826965] Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 84 0d fc ff c3 48 83 ec 08 e8 fa 2b 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 43 2c 00 00 48 89 d0 48 83 c4 08 48 3d 01 [ 52.845857] RSP: 002b:00007f8980e28d20 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 [ 52.853665] RAX: ffffffffffffffda RBX: 00000000006ddc28 RCX: 00000000004475e1 [ 52.860944] RDX: 0000000000000001 RSI: 00007f8980e28d50 RDI: 00000000000000f0 [ 52.868224] RBP: 00000000006ddc20 R08: 0000000000000000 R09: 0000000000000000 [ 52.875511] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000006ddc2c [ 52.882794] R13: 0000000000000000 R14: 0000000000006f6c R15: 000000000000002d [ 52.890072] Modules linked in: [ 52.893604] ---[ end trace 6c2a3ae3adb7c083 ]--- [ 52.898432] RIP: 0010:xfrmi_decode_session+0xeb/0x630 [ 52.903723] Code: 7c e7 10 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 fd 04 00 00 48 b8 00 00 00 00 00 fc ff df 4f 8b 64 e7 10 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 2c 05 00 00 4d 8b 3c 24 e8 72 dc 66 fb e8 7d 33 [ 52.922682] RSP: 0018:ffff8880978cf178 EFLAGS: 00010246 [ 52.928259] RAX: dffffc0000000000 RBX: ffff8880900f0e80 RCX: ffffffff85ed5dbe [ 52.935574] RDX: 0000000000000000 RSI: ffffffff85f21105 RDI: ffff888093aa6788 [ 52.942849] RBP: ffff8880978cf1a0 R08: ffff888096706300 R09: ffffed1015d04733 [ 52.951151] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000000 [ 52.958487] R13: 0000000000000037 R14: ffff8880900f0e90 R15: ffff888093aa6780 [ 52.965805] FS: 00007f8980e29700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 52.974043] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.979961] CR2: 00007f8980e28e78 CR3: 000000009e402000 CR4: 00000000001406f0 [ 52.987273] Kernel panic - not syncing: Fatal exception in interrupt [ 52.994711] Kernel Offset: disabled [ 52.998776] Rebooting in 86400 seconds..