[ 40.213307] audit: type=1800 audit(1578734291.854:31): pid=7759 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 40.234802] audit: type=1800 audit(1578734291.864:32): pid=7759 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 Warning: Permanently added '10.128.0.97' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.076459] kauditd_printk_skb: 3 callbacks suppressed [ 48.076475] audit: type=1400 audit(1578734299.774:36): avc: denied { map } for pid=7947 comm="syz-executor699" path="/root/syz-executor699485018" 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 [ 48.079641] kasan: CONFIG_KASAN_INLINE enabled [ 48.112702] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 48.120111] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 48.126413] CPU: 0 PID: 7947 Comm: syz-executor699 Not tainted 4.19.94-syzkaller #0 [ 48.134191] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.143537] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb50 [ 48.149153] Code: 89 79 61 fb 45 84 f6 0f 84 0d 07 00 00 e8 3b 78 61 fb 49 8d bd 48 1b 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f9 08 00 00 4d 8b ad 48 1b 00 00 e8 fd 88 4e fb [ 48.168038] RSP: 0018:ffff888092f777d0 EFLAGS: 00010206 [ 48.173380] RAX: dffffc0000000000 RBX: ffff888092f77b30 RCX: ffffffff8609a493 [ 48.180633] RDX: 0000000000000369 RSI: ffffffff86099d75 RDI: 0000000000001b48 [ 48.187973] RBP: ffff888092f77890 R08: ffff888097466340 R09: ffffed1015d04733 [ 48.195233] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 000000000000002c [ 48.202500] R13: 0000000000000000 R14: 0000000000000001 R15: ffff888092f77868 [ 48.209755] FS: 0000000002449880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 48.217974] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.223836] CR2: 00000000200008e0 CR3: 00000000a02d3000 CR4: 00000000001406f0 [ 48.231089] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.238341] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.245591] Call Trace: [ 48.248180] ? xt_rateest_lookup+0x280/0x280 [ 48.252588] ? kasan_check_write+0x14/0x20 [ 48.256866] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 48.261728] ? mutex_trylock+0x1e0/0x1e0 [ 48.265780] ? xt_rateest_lookup+0x280/0x280 [ 48.270179] xt_check_target+0x283/0x6a0 [ 48.274238] ? textify_hooks.constprop.0+0x1a0/0x1a0 [ 48.279328] ? mutex_unlock+0xd/0x10 [ 48.283027] ? xt_find_target+0x73/0x280 [ 48.287110] ? xt_find_target+0x73/0x280 [ 48.291173] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.296712] translate_table+0x1005/0x1d70 [ 48.300949] ? arpt_alloc_initial_table+0x690/0x690 [ 48.306072] ? lock_downgrade+0x880/0x880 [ 48.310209] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.315782] ? _copy_from_user+0xdd/0x150 [ 48.319923] do_arpt_set_ctl+0x303/0x640 [ 48.323978] ? compat_do_arpt_get_ctl+0x850/0x850 [ 48.328854] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 48.333683] ? wait_for_completion+0x440/0x440 [ 48.338252] ? mutex_unlock+0xd/0x10 [ 48.341949] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 48.347220] nf_setsockopt+0x77/0xd0 [ 48.350920] ip_setsockopt+0xdf/0x100 [ 48.354707] udp_setsockopt+0x68/0xb0 [ 48.358495] sock_common_setsockopt+0x94/0xd0 [ 48.362976] __sys_setsockopt+0x17a/0x280 [ 48.367124] ? kernel_accept+0x310/0x310 [ 48.371266] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 48.376025] ? do_syscall_64+0x26/0x620 [ 48.379985] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.385335] ? do_syscall_64+0x26/0x620 [ 48.389389] __x64_sys_setsockopt+0xbe/0x150 [ 48.393788] do_syscall_64+0xfd/0x620 [ 48.397624] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.402794] RIP: 0033:0x441699 [ 48.405972] 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 [ 48.424867] RSP: 002b:00007ffe2a19ba08 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 48.432555] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 48.439806] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 48.447062] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 48.454314] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 48.461573] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 48.468835] Modules linked in: [ 48.472189] ---[ end trace 39e0b4ccd6146804 ]--- [ 48.476988] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb50 [ 48.484025] Code: 89 79 61 fb 45 84 f6 0f 84 0d 07 00 00 e8 3b 78 61 fb 49 8d bd 48 1b 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f9 08 00 00 4d 8b ad 48 1b 00 00 e8 fd 88 4e fb [ 48.502993] RSP: 0018:ffff888092f777d0 EFLAGS: 00010206 [ 48.508381] RAX: dffffc0000000000 RBX: ffff888092f77b30 RCX: ffffffff8609a493 [ 48.515668] RDX: 0000000000000369 RSI: ffffffff86099d75 RDI: 0000000000001b48 [ 48.522920] RBP: ffff888092f77890 R08: ffff888097466340 R09: ffffed1015d04733 [ 48.530486] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 000000000000002c [ 48.537795] R13: 0000000000000000 R14: 0000000000000001 R15: ffff888092f77868 [ 48.545174] FS: 0000000002449880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 48.553380] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.559275] CR2: 00000000200008e0 CR3: 00000000a02d3000 CR4: 00000000001406f0 [ 48.566557] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.574025] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.581290] Kernel panic - not syncing: Fatal exception [ 48.588076] Kernel Offset: disabled [ 48.591714] Rebooting in 86400 seconds..