[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 63.102148][ T26] audit: type=1800 audit(1582307183.950:25): pid=8830 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.125610][ T26] audit: type=1800 audit(1582307183.950:26): pid=8830 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 63.166377][ T26] audit: type=1800 audit(1582307183.950:27): pid=8830 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?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 '10.128.1.56' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 75.112380][ T8984] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 75.120365][ T8984] #PF: supervisor instruction fetch in kernel mode [ 75.126842][ T8984] #PF: error_code(0x0010) - not-present page [ 75.132795][ T8984] PGD 8e171067 P4D 8e171067 PUD 93fa2067 PMD 0 [ 75.139023][ T8984] Oops: 0010 [#1] PREEMPT SMP KASAN [ 75.144215][ T8984] CPU: 0 PID: 8984 Comm: syz-executor066 Not tainted 5.6.0-rc2-syzkaller #0 [ 75.152873][ T8984] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.162919][ T8984] RIP: 0010:0x0 [ 75.166376][ T8984] Code: Bad RIP value. [ 75.170419][ T8984] RSP: 0018:ffffc900020b7b80 EFLAGS: 00010246 [ 75.176484][ T8984] RAX: 1ffff110124ba600 RBX: 0000000000000000 RCX: ffff88809fefa600 [ 75.185123][ T8984] RDX: ffff8880994cdb18 RSI: 0000000000000000 RDI: ffff8880925d3140 [ 75.193073][ T8984] RBP: ffffc900020b7bd8 R08: ffffffff870225be R09: fffffbfff140652a [ 75.201046][ T8984] R10: fffffbfff140652a R11: 0000000000000000 R12: ffff8880925d35d0 [ 75.209007][ T8984] R13: ffff8880925d3140 R14: dffffc0000000000 R15: 1ffff110124ba6ba [ 75.216960][ T8984] FS: 0000000001a0b880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 75.225861][ T8984] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.232438][ T8984] CR2: ffffffffffffffd6 CR3: 00000000a6d6f000 CR4: 00000000001406f0 [ 75.240520][ T8984] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.248579][ T8984] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.256548][ T8984] Call Trace: [ 75.259819][ T8984] cipso_v4_sock_setattr+0x34b/0x470 [ 75.265190][ T8984] netlbl_sock_setattr+0x2a7/0x310 [ 75.271250][ T8984] smack_inode_setsecurity+0x3da/0x4a0 [ 75.276704][ T8984] security_inode_setsecurity+0xb2/0x140 [ 75.282312][ T8984] __vfs_setxattr_noperm+0x16f/0x3e0 [ 75.287610][ T8984] setxattr+0x335/0x430 [ 75.291874][ T8984] ? preempt_count_add+0x69/0x160 [ 75.297013][ T8984] ? __mnt_want_write+0x207/0x280 [ 75.302208][ T8984] ? mnt_want_write_file+0x1c5/0x260 [ 75.307518][ T8984] __se_sys_fsetxattr+0x130/0x1b0 [ 75.312552][ T8984] __x64_sys_fsetxattr+0xbf/0xd0 [ 75.317484][ T8984] do_syscall_64+0xf7/0x1c0 [ 75.321982][ T8984] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.327920][ T8984] RIP: 0033:0x440199 [ 75.331809][ T8984] 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 [ 75.351775][ T8984] RSP: 002b:00007ffcadc19e48 EFLAGS: 00000246 ORIG_RAX: 00000000000000be [ 75.360393][ T8984] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440199 [ 75.368358][ T8984] RDX: 0000000020000200 RSI: 00000000200001c0 RDI: 0000000000000003 [ 75.376371][ T8984] RBP: 00000000006ca018 R08: 0000000000000003 R09: 00000000004002c8 [ 75.384376][ T8984] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000401a20 [ 75.392448][ T8984] R13: 0000000000401ab0 R14: 0000000000000000 R15: 0000000000000000 [ 75.401011][ T8984] Modules linked in: [ 75.404890][ T8984] CR2: 0000000000000000 [ 75.409073][ T8984] ---[ end trace 9bbc7bb8e1061a42 ]--- [ 75.414519][ T8984] RIP: 0010:0x0 [ 75.417964][ T8984] Code: Bad RIP value. [ 75.422006][ T8984] RSP: 0018:ffffc900020b7b80 EFLAGS: 00010246 [ 75.428100][ T8984] RAX: 1ffff110124ba600 RBX: 0000000000000000 RCX: ffff88809fefa600 [ 75.436101][ T8984] RDX: ffff8880994cdb18 RSI: 0000000000000000 RDI: ffff8880925d3140 [ 75.444059][ T8984] RBP: ffffc900020b7bd8 R08: ffffffff870225be R09: fffffbfff140652a [ 75.452029][ T8984] R10: fffffbfff140652a R11: 0000000000000000 R12: ffff8880925d35d0 [ 75.459989][ T8984] R13: ffff8880925d3140 R14: dffffc0000000000 R15: 1ffff110124ba6ba [ 75.467953][ T8984] FS: 0000000001a0b880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 75.476898][ T8984] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.483579][ T8984] CR2: ffffffffffffffd6 CR3: 00000000a6d6f000 CR4: 00000000001406f0 [ 75.491539][ T8984] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.499581][ T8984] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.507668][ T8984] Kernel panic - not syncing: Fatal exception in interrupt [ 75.516585][ T8984] Kernel Offset: disabled [ 75.521013][ T8984] Rebooting in 86400 seconds..