[ 42.865692] audit: type=1800 audit(1554944033.827:29): pid=7751 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 [ 42.895278] audit: type=1800 audit(1554944033.837:30): pid=7751 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 '10.128.1.44' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.340377] kauditd_printk_skb: 5 callbacks suppressed [ 59.340394] audit: type=1400 audit(1554944050.307:36): avc: denied { map } for pid=7936 comm="syz-executor403" path="/root/syz-executor403748263" 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 [ 59.345040] netlink: 'syz-executor403': attribute type 3 has an invalid length. [ 59.345741] audit: type=1400 audit(1554944050.307:37): avc: denied { create } for pid=7936 comm="syz-executor403" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 59.372888] netlink: 'syz-executor403': attribute type 2 has an invalid length. [ 59.380876] audit: type=1400 audit(1554944050.307:38): avc: denied { write } for pid=7936 comm="syz-executor403" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 59.407665] kasan: CONFIG_KASAN_INLINE enabled [ 59.443470] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 59.450938] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 59.457739] CPU: 1 PID: 7936 Comm: syz-executor403 Not tainted 4.19.34 #2 [ 59.464848] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.474220] RIP: 0010:gre_timeout_obj_to_nlattr+0x77/0x1a0 [ 59.479859] Code: 97 85 c7 00 f1 f1 f1 f1 c7 40 04 04 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 b0 96 d3 fb 48 89 d8 48 c1 e8 03 <42> 0f b6 14 38 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 [ 59.499571] RSP: 0018:ffff8880995573d0 EFLAGS: 00010246 [ 59.505651] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8599425b [ 59.513156] RDX: 0000000000000000 RSI: ffffffff8597a090 RDI: ffff88808bbf22c0 [ 59.520732] RBP: ffff888099557460 R08: ffff888098dc0500 R09: ffff888080872aa8 [ 59.528342] R10: ffffed101010e554 R11: ffff888080872aa0 R12: 1ffff110132aae7b [ 59.535807] R13: ffff88808bbf22c0 R14: ffff888099557438 R15: dffffc0000000000 [ 59.543434] FS: 00000000015e5880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 59.551958] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.558375] CR2: 000055b922d4a190 CR3: 000000009f7ad000 CR4: 00000000001406e0 [ 59.566044] Call Trace: [ 59.568717] ? memcpy+0x46/0x50 [ 59.571997] ? gre_print_conntrack+0xc0/0xc0 [ 59.576845] ? __nla_put+0x37/0x40 [ 59.580523] ? nla_put+0x116/0x150 [ 59.584065] cttimeout_default_get+0x69a/0xa80 [ 59.588735] ? cttimeout_del_timeout+0x1a0/0x1a0 [ 59.594061] ? __lock_is_held+0x9f/0x140 [ 59.598418] ? cttimeout_del_timeout+0x1a0/0x1a0 [ 59.603194] nfnetlink_rcv_msg+0xd12/0xfe0 [ 59.607740] ? nfnetlink_bind+0x2d0/0x2d0 [ 59.611889] ? avc_has_extended_perms+0x10f0/0x10f0 [ 59.617206] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.622782] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.628330] ? cred_has_capability+0x193/0x320 [ 59.633001] ? selinux_ipv4_output+0x50/0x50 [ 59.637407] ? sock_sendmsg+0xdd/0x130 [ 59.641559] ? mark_held_locks+0x100/0x100 [ 59.645807] netlink_rcv_skb+0x180/0x460 [ 59.650038] ? nfnetlink_bind+0x2d0/0x2d0 [ 59.654797] ? netlink_ack+0xb60/0xb60 [ 59.659106] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.664856] ? ns_capable+0x23/0x30 [ 59.668597] ? __netlink_ns_capable+0x104/0x140 [ 59.673262] nfnetlink_rcv+0x1c0/0x460 [ 59.677226] ? nfnetlink_rcv_batch+0x1770/0x1770 [ 59.682111] ? netlink_deliver_tap+0x254/0xc20 [ 59.686787] ? kasan_check_write+0x14/0x20 [ 59.691184] netlink_unicast+0x53c/0x720 [ 59.695364] ? netlink_attachskb+0x770/0x770 [ 59.699795] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.705654] netlink_sendmsg+0x8ae/0xd70 [ 59.709709] ? netlink_unicast+0x720/0x720 [ 59.713987] ? selinux_socket_sendmsg+0x36/0x40 [ 59.718649] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.724291] ? security_socket_sendmsg+0x93/0xc0 [ 59.729137] ? netlink_unicast+0x720/0x720 [ 59.733477] sock_sendmsg+0xdd/0x130 [ 59.737440] ___sys_sendmsg+0x806/0x930 [ 59.741437] ? copy_msghdr_from_user+0x430/0x430 [ 59.746559] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.752367] ? __handle_mm_fault+0x7d3/0x3f80 [ 59.756865] ? vmf_insert_mixed_mkwrite+0x90/0x90 [ 59.761743] ? find_held_lock+0x35/0x130 [ 59.765817] ? __do_page_fault+0x676/0xe90 [ 59.770047] ? find_held_lock+0x35/0x130 [ 59.774145] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.779775] ? __fget_light+0x1a9/0x230 [ 59.783744] ? __fdget+0x1b/0x20 [ 59.787167] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 59.792904] __sys_sendmsg+0x105/0x1d0 [ 59.796999] ? __ia32_sys_shutdown+0x80/0x80 [ 59.801447] ? up_read+0x1a/0x110 [ 59.804899] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 59.809771] ? do_syscall_64+0x26/0x610 [ 59.813765] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 59.819158] ? do_syscall_64+0x26/0x610 [ 59.823142] __x64_sys_sendmsg+0x78/0xb0 [ 59.827194] do_syscall_64+0x103/0x610 [ 59.831076] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 59.836253] RIP: 0033:0x4401e9 [ 59.839430] 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 [ 59.858696] RSP: 002b:00007ffd4cd243b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 59.866486] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401e9 [ 59.873760] RDX: 0000000000000000 RSI: 0000000020dddfc8 RDI: 0000000000000003 [ 59.881018] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 59.888277] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a70 [ 59.895543] R13: 0000000000401b00 R14: 0000000000000000 R15: 0000000000000000 [ 59.902850] Modules linked in: [ 59.906678] ---[ end trace 39d3e32c62d901b2 ]--- [ 59.911461] RIP: 0010:gre_timeout_obj_to_nlattr+0x77/0x1a0 [ 59.917607] Code: 97 85 c7 00 f1 f1 f1 f1 c7 40 04 04 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 b0 96 d3 fb 48 89 d8 48 c1 e8 03 <42> 0f b6 14 38 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 [ 59.936922] RSP: 0018:ffff8880995573d0 EFLAGS: 00010246 [ 59.942305] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8599425b [ 59.949628] RDX: 0000000000000000 RSI: ffffffff8597a090 RDI: ffff88808bbf22c0 [ 59.956932] RBP: ffff888099557460 R08: ffff888098dc0500 R09: ffff888080872aa8 [ 59.964318] R10: ffffed101010e554 R11: ffff888080872aa0 R12: 1ffff110132aae7b [ 59.971650] R13: ffff88808bbf22c0 R14: ffff888099557438 R15: dffffc0000000000 [ 59.978989] FS: 00000000015e5880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 59.987491] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.993386] CR2: 000055b922d4a190 CR3: 000000009f7ad000 CR4: 00000000001406e0 [ 60.000705] Kernel panic - not syncing: Fatal exception [ 60.006908] Kernel Offset: disabled [ 60.010539] Rebooting in 86400 seconds..