[ 40.072950] audit: type=1800 audit(1579933957.899:32): pid=7827 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 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: [ 44.755473] kauditd_printk_skb: 2 callbacks suppressed [ 44.755489] audit: type=1400 audit(1579933962.669:35): avc: denied { map } for pid=8001 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 '10.128.0.243' (ECDSA) to the list of known hosts. executing program [ 51.423324] audit: type=1400 audit(1579933969.339:36): avc: denied { map } for pid=8013 comm="syz-executor528" path="/root/syz-executor528425831" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 51.427174] kasan: CONFIG_KASAN_INLINE enabled [ 51.450277] audit: type=1400 audit(1579933969.339:37): avc: denied { create } for pid=8013 comm="syz-executor528" 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 [ 51.454777] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 51.478851] audit: type=1400 audit(1579933969.339:38): avc: denied { write } for pid=8013 comm="syz-executor528" 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 [ 51.488982] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 51.516342] CPU: 0 PID: 8013 Comm: syz-executor528 Not tainted 4.19.98-syzkaller #0 [ 51.524123] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.533480] RIP: 0010:nfnetlink_parse_nat_setup+0x252/0x450 [ 51.539176] 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 af 5c 6d fb 85 db 0f 88 44 01 00 [ 51.558590] RSP: 0018:ffff88808ec9f148 EFLAGS: 00010246 [ 51.563947] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fdb9f8 [ 51.571207] RDX: 1ffffffff0c07d47 RSI: ffff88808ec9f180 RDI: ffff88808ec9f1d0 [ 51.578466] RBP: ffff88808ec9f268 R08: ffff8880a8a8a340 R09: ffff88808ec9f1d0 [ 51.585769] R10: ffffed1011d93e3f R11: ffff88808ec9f1ff R12: ffff8880903bddc0 [ 51.593031] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8603ea00 [ 51.600290] FS: 0000000000762880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 51.608503] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.614418] CR2: 000055794fcdb1b0 CR3: 0000000098804000 CR4: 00000000001406f0 [ 51.621673] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.628933] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.636190] Call Trace: [ 51.638768] ? nf_nat_inet_fn+0x8b0/0x8b0 [ 51.642916] ctnetlink_parse_nat_setup+0xc5/0x660 [ 51.648276] ctnetlink_create_conntrack+0x532/0x1300 [ 51.653409] ? ctnetlink_dump_table+0x12e0/0x12e0 [ 51.658283] ? __nf_conntrack_confirm+0x31e0/0x31e0 [ 51.663341] ctnetlink_new_conntrack+0x527/0xe50 [ 51.668095] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 51.673452] ? find_held_lock+0x35/0x130 [ 51.677508] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 51.682744] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 51.688110] nfnetlink_rcv_msg+0xd0d/0xfcf [ 51.692341] ? nfnetlink_bind+0x2c0/0x2c0 [ 51.696518] ? avc_has_extended_perms+0x10f0/0x10f0 [ 51.701523] ? __save_stack_trace+0x99/0x100 [ 51.705932] ? selinux_ipv4_output+0x50/0x50 [ 51.710330] ? netlink_sendmsg+0x97b/0xd70 [ 51.714562] ? mark_held_locks+0x100/0x100 [ 51.718790] netlink_rcv_skb+0x17d/0x460 [ 51.722856] ? nfnetlink_bind+0x2c0/0x2c0 [ 51.727079] ? netlink_ack+0xb30/0xb30 [ 51.730961] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.736520] ? ns_capable_common+0x93/0x100 [ 51.740933] ? ns_capable+0x20/0x30 [ 51.744554] ? __netlink_ns_capable+0x104/0x140 [ 51.749242] nfnetlink_rcv+0x1c0/0x460 [ 51.753213] ? nfnetlink_rcv_batch+0x1750/0x1750 [ 51.757961] ? netlink_deliver_tap+0x254/0xc20 [ 51.762530] ? kasan_check_write+0x14/0x20 [ 51.766758] netlink_unicast+0x53a/0x730 [ 51.770811] ? netlink_attachskb+0x770/0x770 [ 51.775211] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.780781] netlink_sendmsg+0x8ae/0xd70 [ 51.784834] ? netlink_unicast+0x730/0x730 [ 51.789102] ? selinux_socket_sendmsg+0x36/0x40 [ 51.793761] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.799288] ? security_socket_sendmsg+0x8d/0xc0 [ 51.804036] ? netlink_unicast+0x730/0x730 [ 51.808264] sock_sendmsg+0xd7/0x130 [ 51.812147] ___sys_sendmsg+0x803/0x920 [ 51.816115] ? copy_msghdr_from_user+0x430/0x430 [ 51.820902] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.826463] ? __handle_mm_fault+0x7d1/0x3f80 [ 51.830987] ? copy_page_range+0x2030/0x2030 [ 51.835397] ? __do_page_fault+0x676/0xe90 [ 51.839621] ? find_held_lock+0x35/0x130 [ 51.843668] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.849202] ? __fget_light+0x1a9/0x230 [ 51.853174] ? __fdget+0x1b/0x20 [ 51.856523] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 51.862047] __sys_sendmsg+0x105/0x1d0 [ 51.865950] ? __ia32_sys_shutdown+0x80/0x80 [ 51.870375] ? up_read+0x1a/0x110 [ 51.873818] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 51.878555] ? do_syscall_64+0x26/0x620 [ 51.882521] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.887864] ? do_syscall_64+0x26/0x620 [ 51.891823] __x64_sys_sendmsg+0x78/0xb0 [ 51.895866] do_syscall_64+0xfd/0x620 [ 51.899649] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.904816] RIP: 0033:0x440269 [ 51.907990] 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 [ 51.926872] RSP: 002b:00007fff0f3e59f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 51.934568] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440269 [ 51.941827] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 51.949076] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 51.956336] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401af0 [ 51.963600] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000 [ 51.970860] Modules linked in: [ 51.974561] ---[ end trace 3b4fadb95f4023f4 ]--- [ 51.979328] RIP: 0010:nfnetlink_parse_nat_setup+0x252/0x450 [ 51.985058] 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 af 5c 6d fb 85 db 0f 88 44 01 00 [ 52.003990] RSP: 0018:ffff88808ec9f148 EFLAGS: 00010246 [ 52.009342] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fdb9f8 [ 52.016628] RDX: 1ffffffff0c07d47 RSI: ffff88808ec9f180 RDI: ffff88808ec9f1d0 [ 52.023912] RBP: ffff88808ec9f268 R08: ffff8880a8a8a340 R09: ffff88808ec9f1d0 [ 52.031217] R10: ffffed1011d93e3f R11: ffff88808ec9f1ff R12: ffff8880903bddc0 [ 52.038484] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8603ea00 [ 52.045778] FS: 0000000000762880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 52.054012] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.059918] CR2: 000055794fcdb1b0 CR3: 0000000098804000 CR4: 00000000001406f0 [ 52.067181] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.074476] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.081766] Kernel panic - not syncing: Fatal exception [ 52.088497] Kernel Offset: disabled [ 52.092195] Rebooting in 86400 seconds..