[ 42.055060] audit: type=1800 audit(1580384959.511:30): pid=7945 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 46.618692] kauditd_printk_skb: 4 callbacks suppressed [ 46.618707] audit: type=1400 audit(1580384964.111:35): avc: denied { map } for pid=8119 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 '10.128.1.11' (ECDSA) to the list of known hosts. executing program [ 68.193508] audit: type=1400 audit(1580384985.691:36): avc: denied { map } for pid=8131 comm="syz-executor623" path="/root/syz-executor623733009" 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 [ 68.197220] kasan: CONFIG_KASAN_INLINE enabled [ 68.220052] audit: type=1400 audit(1580384985.691:37): avc: denied { create } for pid=8131 comm="syz-executor623" 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 [ 68.220076] audit: type=1400 audit(1580384985.691:38): avc: denied { write } for pid=8131 comm="syz-executor623" 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 [ 68.273143] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 68.280829] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 68.287075] CPU: 0 PID: 8131 Comm: syz-executor623 Not tainted 4.19.100-syzkaller #0 [ 68.295031] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.304506] RIP: 0010:nfnetlink_parse_nat_setup+0x252/0x450 [ 68.310256] Code: 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ed 01 00 00 48 8b b5 e8 fe ff ff 48 8b bd e0 fe ff ff <41> ff 57 38 31 ff 89 c3 89 c6 e8 bf a7 6e fb 85 db 0f 88 44 01 00 [ 68.329163] RSP: 0018:ffff8880a9087148 EFLAGS: 00010246 [ 68.334826] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fc5e08 [ 68.342150] RDX: 1ffffffff0c06da5 RSI: ffff8880a9087180 RDI: ffff8880a90871d0 [ 68.349503] RBP: ffff8880a9087268 R08: ffff8880a9146440 R09: ffff8880a90871d0 [ 68.356773] R10: ffffed1015210e3f R11: ffff8880a90871ff R12: ffff888098f86a80 [ 68.364035] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86036cf0 [ 68.371297] FS: 0000000002205880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 68.379512] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.385379] CR2: 00005640f0d0d180 CR3: 00000000a837f000 CR4: 00000000001406f0 [ 68.392644] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.400065] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.407437] Call Trace: [ 68.410016] ? nf_nat_inet_fn+0x8b0/0x8b0 [ 68.414156] ctnetlink_parse_nat_setup+0xc5/0x660 [ 68.419048] ctnetlink_create_conntrack+0x4ea/0x1300 [ 68.424254] ? ctnetlink_dump_table+0x12e0/0x12e0 [ 68.429185] ? __nf_conntrack_confirm+0x31e0/0x31e0 [ 68.434198] ctnetlink_new_conntrack+0x527/0xe50 [ 68.438997] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 68.444363] ? find_held_lock+0x35/0x130 [ 68.448430] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 68.453638] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 68.458994] nfnetlink_rcv_msg+0xd0d/0xfcf [ 68.463232] ? nfnetlink_bind+0x2c0/0x2c0 [ 68.467419] ? avc_has_extended_perms+0x10f0/0x10f0 [ 68.472474] ? __save_stack_trace+0x99/0x100 [ 68.476896] ? selinux_ipv4_output+0x50/0x50 [ 68.481302] ? netlink_sendmsg+0x97b/0xd70 [ 68.485539] ? mark_held_locks+0x100/0x100 [ 68.489782] netlink_rcv_skb+0x17d/0x460 [ 68.493843] ? nfnetlink_bind+0x2c0/0x2c0 [ 68.497992] ? netlink_ack+0xb30/0xb30 [ 68.501999] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.507535] ? ns_capable_common+0x93/0x100 [ 68.511883] ? ns_capable+0x20/0x30 [ 68.515509] ? __netlink_ns_capable+0x104/0x140 [ 68.520170] nfnetlink_rcv+0x1c0/0x460 [ 68.524045] ? nfnetlink_rcv_batch+0x1750/0x1750 [ 68.528847] ? netlink_deliver_tap+0x254/0xc20 [ 68.533421] ? kasan_check_write+0x14/0x20 [ 68.537656] netlink_unicast+0x53a/0x730 [ 68.541712] ? netlink_attachskb+0x770/0x770 [ 68.546123] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.551664] netlink_sendmsg+0x8ae/0xd70 [ 68.555728] ? netlink_unicast+0x730/0x730 [ 68.559964] ? selinux_socket_sendmsg+0x36/0x40 [ 68.564630] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.570167] ? security_socket_sendmsg+0x8d/0xc0 [ 68.574933] ? netlink_unicast+0x730/0x730 [ 68.579163] sock_sendmsg+0xd7/0x130 [ 68.582865] ___sys_sendmsg+0x803/0x920 [ 68.586844] ? copy_msghdr_from_user+0x430/0x430 [ 68.591591] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.597126] ? __handle_mm_fault+0x7d1/0x3f80 [ 68.601607] ? copy_page_range+0x2030/0x2030 [ 68.606001] ? __do_page_fault+0x676/0xe90 [ 68.610234] ? find_held_lock+0x35/0x130 [ 68.614286] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.619820] ? __fget_light+0x1a9/0x230 [ 68.623793] ? __fdget+0x1b/0x20 [ 68.627149] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 68.632684] __sys_sendmsg+0x105/0x1d0 [ 68.636681] ? __ia32_sys_shutdown+0x80/0x80 [ 68.641087] ? up_read+0x1a/0x110 [ 68.644539] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 68.649417] ? do_syscall_64+0x26/0x620 [ 68.653383] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.658809] ? do_syscall_64+0x26/0x620 [ 68.662825] __x64_sys_sendmsg+0x78/0xb0 [ 68.666886] do_syscall_64+0xfd/0x620 [ 68.670679] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.675866] RIP: 0033:0x4401a9 [ 68.679213] 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 [ 68.698113] RSP: 002b:00007ffc0a295fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 68.705816] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401a9 [ 68.713122] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 68.720387] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 68.727723] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a30 [ 68.734986] R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000 [ 68.742392] Modules linked in: [ 68.746153] ---[ end trace a3bf18d6ee7a267b ]--- [ 68.750940] RIP: 0010:nfnetlink_parse_nat_setup+0x252/0x450 [ 68.756647] Code: 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ed 01 00 00 48 8b b5 e8 fe ff ff 48 8b bd e0 fe ff ff <41> ff 57 38 31 ff 89 c3 89 c6 e8 bf a7 6e fb 85 db 0f 88 44 01 00 [ 68.775630] RSP: 0018:ffff8880a9087148 EFLAGS: 00010246 [ 68.781035] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fc5e08 [ 68.788294] RDX: 1ffffffff0c06da5 RSI: ffff8880a9087180 RDI: ffff8880a90871d0 [ 68.795646] RBP: ffff8880a9087268 R08: ffff8880a9146440 R09: ffff8880a90871d0 [ 68.802933] R10: ffffed1015210e3f R11: ffff8880a90871ff R12: ffff888098f86a80 [ 68.810378] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86036cf0 [ 68.817659] FS: 0000000002205880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 68.825954] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.831905] CR2: 00005640f0d0d180 CR3: 00000000a837f000 CR4: 00000000001406f0 [ 68.839172] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.846490] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.853848] Kernel panic - not syncing: Fatal exception [ 68.860535] Kernel Offset: disabled [ 68.864170] Rebooting in 86400 seconds..