[ 46.161158] audit: type=1800 audit(1554914083.677:30): pid=7780 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 syzkaller login: [ 62.241966] kauditd_printk_skb: 4 callbacks suppressed [ 62.241982] audit: type=1400 audit(1554914099.797:35): avc: denied { map } for pid=7954 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.184' (ECDSA) to the list of known hosts. executing program [ 69.353661] audit: type=1400 audit(1554914106.907:36): avc: denied { map } for pid=7966 comm="syz-executor004" path="/root/syz-executor004953496" 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 [ 69.360844] netlink: 'syz-executor004': attribute type 3 has an invalid length. [ 69.380533] audit: type=1400 audit(1554914106.907:37): avc: denied { create } for pid=7966 comm="syz-executor004" 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 [ 69.380559] audit: type=1400 audit(1554914106.907:38): avc: denied { write } for pid=7966 comm="syz-executor004" 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 [ 69.440796] netlink: 'syz-executor004': attribute type 2 has an invalid length. [ 69.449459] kasan: CONFIG_KASAN_INLINE enabled [ 69.455471] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 69.463285] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 69.469784] CPU: 0 PID: 7966 Comm: syz-executor004 Not tainted 4.19.34 #2 [ 69.476876] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.486616] RIP: 0010:udp_timeout_obj_to_nlattr+0x77/0x1a0 [ 69.492277] Code: 96 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 30 9a d4 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 [ 69.511713] RSP: 0018:ffff88807eab73d0 EFLAGS: 00010246 [ 69.517182] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8599425b [ 69.524648] RDX: 0000000000000000 RSI: ffffffff85969d10 RDI: ffff888093d7fc00 [ 69.532143] RBP: ffff88807eab7460 R08: ffff888092cf8300 R09: ffff88808e7e6128 [ 69.539571] R10: ffffed1011cfcc24 R11: ffff88808e7e6120 R12: 1ffff1100fd56e7b [ 69.546843] R13: ffff888093d7fc00 R14: ffff88807eab7438 R15: dffffc0000000000 [ 69.554465] FS: 0000000001f23880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 69.563079] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.569198] CR2: 000055a5de61f1b0 CR3: 0000000098f02000 CR4: 00000000001406f0 [ 69.576568] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.584316] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.591731] Call Trace: [ 69.594348] ? memcpy+0x46/0x50 [ 69.598447] ? udp_timeout_nlattr_to_obj+0x240/0x240 [ 69.604368] ? __nla_put+0x37/0x40 [ 69.609148] ? nla_put+0x116/0x150 [ 69.612853] cttimeout_default_get+0x69a/0xa80 [ 69.617842] ? cttimeout_del_timeout+0x1a0/0x1a0 [ 69.625519] ? __lock_is_held+0x81/0x140 [ 69.630781] ? cttimeout_del_timeout+0x1a0/0x1a0 [ 69.635696] nfnetlink_rcv_msg+0xd12/0xfe0 [ 69.640363] ? nfnetlink_bind+0x2d0/0x2d0 [ 69.644696] ? avc_has_extended_perms+0x10f0/0x10f0 [ 69.650046] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.655887] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.661564] ? cred_has_capability+0x193/0x320 [ 69.666407] ? selinux_ipv4_output+0x50/0x50 [ 69.670914] ? sock_sendmsg+0xdd/0x130 [ 69.675247] ? mark_held_locks+0x100/0x100 [ 69.679650] netlink_rcv_skb+0x180/0x460 [ 69.683842] ? nfnetlink_bind+0x2d0/0x2d0 [ 69.688213] ? netlink_ack+0xb60/0xb60 [ 69.692680] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.699244] ? ns_capable+0x23/0x30 [ 69.702976] ? __netlink_ns_capable+0x104/0x140 [ 69.708322] nfnetlink_rcv+0x1c0/0x460 [ 69.713071] ? nfnetlink_rcv_batch+0x1770/0x1770 [ 69.717968] ? netlink_deliver_tap+0x254/0xc20 [ 69.722737] ? kasan_check_write+0x14/0x20 [ 69.727215] netlink_unicast+0x53c/0x720 [ 69.731574] ? netlink_attachskb+0x770/0x770 [ 69.736315] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.742684] netlink_sendmsg+0x8ae/0xd70 [ 69.747269] ? netlink_unicast+0x720/0x720 [ 69.751835] ? selinux_socket_sendmsg+0x36/0x40 [ 69.756645] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.763163] ? security_socket_sendmsg+0x93/0xc0 [ 69.768256] ? netlink_unicast+0x720/0x720 [ 69.772840] sock_sendmsg+0xdd/0x130 [ 69.776760] ___sys_sendmsg+0x806/0x930 [ 69.780742] ? copy_msghdr_from_user+0x430/0x430 [ 69.785537] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.791658] ? __handle_mm_fault+0x7d3/0x3f80 [ 69.796281] ? vmf_insert_mixed_mkwrite+0x90/0x90 [ 69.801128] ? find_held_lock+0x35/0x130 [ 69.805193] ? __do_page_fault+0x676/0xe90 [ 69.809639] ? find_held_lock+0x35/0x130 [ 69.813701] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.819604] ? __fget_light+0x1a9/0x230 [ 69.823626] ? __fdget+0x1b/0x20 [ 69.827119] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 69.833047] __sys_sendmsg+0x105/0x1d0 [ 69.837083] ? __ia32_sys_shutdown+0x80/0x80 [ 69.841593] ? up_read+0x1a/0x110 [ 69.845603] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 69.850612] ? do_syscall_64+0x26/0x610 [ 69.854955] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.860408] ? do_syscall_64+0x26/0x610 [ 69.864555] __x64_sys_sendmsg+0x78/0xb0 [ 69.868621] do_syscall_64+0x103/0x610 [ 69.872506] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.877717] RIP: 0033:0x4401e9 [ 69.880923] 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 [ 69.900260] RSP: 002b:00007ffc4cb06ab8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 69.908064] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401e9 [ 69.915734] RDX: 0000000000000000 RSI: 0000000020dddfc8 RDI: 0000000000000003 [ 69.923051] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 69.930675] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a70 [ 69.937944] R13: 0000000000401b00 R14: 0000000000000000 R15: 0000000000000000 [ 69.945213] Modules linked in: [ 69.948931] ---[ end trace 5fce1ac23dd2ea21 ]--- [ 69.953718] RIP: 0010:udp_timeout_obj_to_nlattr+0x77/0x1a0 [ 69.959428] Code: 96 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 30 9a d4 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 [ 69.978989] RSP: 0018:ffff88807eab73d0 EFLAGS: 00010246 [ 69.984910] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8599425b [ 69.992695] RDX: 0000000000000000 RSI: ffffffff85969d10 RDI: ffff888093d7fc00 [ 70.000806] RBP: ffff88807eab7460 R08: ffff888092cf8300 R09: ffff88808e7e6128 [ 70.008274] R10: ffffed1011cfcc24 R11: ffff88808e7e6120 R12: 1ffff1100fd56e7b [ 70.016351] R13: ffff888093d7fc00 R14: ffff88807eab7438 R15: dffffc0000000000 [ 70.023693] FS: 0000000001f23880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 70.033407] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.039346] CR2: 000055a5de61f1b0 CR3: 0000000098f02000 CR4: 00000000001406f0 [ 70.047360] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.054905] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.071921] Kernel panic - not syncing: Fatal exception [ 70.078380] Kernel Offset: disabled [ 70.082677] Rebooting in 86400 seconds..