[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 11.254660] random: sshd: uninitialized urandom read (32 bytes read) [ 11.448948] audit: type=1400 audit(1567644046.652:6): avc: denied { map } for pid=1768 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 [ 11.478905] random: sshd: uninitialized urandom read (32 bytes read) [ 11.965047] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.814782] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.10' (ECDSA) to the list of known hosts. [ 25.278801] random: sshd: uninitialized urandom read (32 bytes read) 2019/09/05 00:41:00 parsed 1 programs [ 25.372344] audit: type=1400 audit(1567644060.582:7): avc: denied { map } for pid=1786 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 25.432238] audit: type=1400 audit(1567644060.642:8): avc: denied { map } for pid=1786 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=5044 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 [ 25.945325] random: cc1: uninitialized urandom read (8 bytes read) 2019/09/05 00:41:02 executed programs: 0 [ 26.917778] audit: type=1400 audit(1567644062.122:9): avc: denied { map } for pid=1786 comm="syz-execprog" path="/root/syzkaller-shm473058180" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 29.300173] ------------[ cut here ]------------ [ 29.305124] kernel BUG at ./include/linux/skbuff.h:1406! [ 29.310665] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 29.316533] Modules linked in: [ 29.319715] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.141+ #0 [ 29.326701] task: (ptrval) task.stack: (ptrval) [ 29.332759] RIP: 0010:tcp_fragment+0x12c6/0x13e0 [ 29.337490] RSP: 0018:ffff8881dba07bf8 EFLAGS: 00010206 [ 29.342835] RAX: ffffffffa2030d40 RBX: ffff8881d3a28a80 RCX: 1ffff1103a745199 [ 29.350092] RDX: 0000000000000100 RSI: ffff8881cfb70280 RDI: ffff8881cfb70288 [ 29.357347] RBP: ffff8881cfb70280 R08: 0000000001080020 R09: ffff88821ffff008 [ 29.364600] R10: ffff88821ffff017 R11: ffff88821ffff010 R12: 0000000000000000 [ 29.372627] R13: 0000000000006800 R14: 0000000001080020 R15: ffff8881d3a28cd0 [ 29.379943] FS: 0000000000000000(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 [ 29.388307] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.394226] CR2: 000000000075c000 CR3: 000000014d826005 CR4: 00000000001606b0 [ 29.401477] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.408726] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.416005] Call Trace: [ 29.418572] [ 29.420718] tcp_write_wakeup+0x32b/0x570 [ 29.424861] ? tcp_write_timer_handler+0x780/0x780 [ 29.429792] ? tcp_write_timer_handler+0x780/0x780 [ 29.434702] tcp_send_probe0+0x46/0x3cc [ 29.438670] ? tcp_write_timer_handler+0x780/0x780 [ 29.443577] tcp_write_timer_handler+0x687/0x780 [ 29.448313] tcp_write_timer+0xc9/0x170 [ 29.452265] call_timer_fn+0x15b/0x6a0 [ 29.456138] ? collect_expired_timers+0x280/0x280 [ 29.461072] ? check_preemption_disabled+0x35/0x1f0 [ 29.466069] ? _raw_spin_unlock_irq+0x24/0x50 [ 29.470855] ? tcp_write_timer_handler+0x780/0x780 [ 29.475801] expire_timers+0x227/0x4c0 [ 29.479683] run_timer_softirq+0x1eb/0x5d0 [ 29.483898] ? expire_timers+0x4c0/0x4c0 [ 29.487942] ? check_preemption_disabled+0x35/0x1f0 [ 29.493114] ? check_preemption_disabled+0x35/0x1f0 [ 29.498115] __do_softirq+0x234/0x9ec [ 29.501901] ? check_preemption_disabled+0x35/0x1f0 [ 29.506960] irq_exit+0x114/0x150 [ 29.510402] smp_apic_timer_interrupt+0x1a7/0x650 [ 29.515228] apic_timer_interrupt+0x8c/0xa0 [ 29.519524] [ 29.521741] RIP: 0010:native_safe_halt+0x13/0x20 [ 29.526482] RSP: 0018:ffffffffa2007d48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 [ 29.534178] RAX: 0000000000000000 RBX: ffffffffa242eba8 RCX: 0000000000000000 [ 29.541436] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffffa203156c [ 29.548681] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 29.555977] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 29.563233] R13: 0000000000000000 R14: ffffffffa2030d40 R15: dffffc0000000000 [ 29.570502] default_idle+0x61/0x3b0 [ 29.574194] do_idle+0x2e6/0x390 [ 29.577543] ? arch_cpu_idle_exit+0x40/0x40 [ 29.582041] ? check_preemption_disabled+0x35/0x1f0 [ 29.587037] cpu_startup_entry+0xc6/0xd0 [ 29.591084] ? cpu_in_idle+0x20/0x20 [ 29.594792] ? preempt_count_add+0xb8/0x180 [ 29.599096] ? trace_event_define_fields_x86_irq_vector+0x28/0x28 [ 29.605308] start_kernel+0x858/0x890 [ 29.609094] ? mem_encrypt_init+0x5/0x5 [ 29.613060] ? memcpy_orig+0x54/0x110 [ 29.616848] secondary_startup_64+0xa5/0xb0 [ 29.621148] Code: ea 03 80 3c 02 00 0f 85 2c 01 00 00 4c 8b bb 58 02 00 00 ba 00 00 00 00 4c 3b 7c 24 18 4c 0f 44 fa e9 bd fc ff ff e8 4a d0 da fe <0f> 0b e8 c3 98 fd fe e9 4d ef ff ff e8 b9 98 fd fe e9 2d f2 ff [ 29.640326] RIP: tcp_fragment+0x12c6/0x13e0 RSP: ffff8881dba07bf8 [ 29.646616] ---[ end trace 71aee728a1403100 ]--- [ 29.651390] Kernel panic - not syncing: Fatal exception in interrupt [ 29.658875] Kernel Offset: 0x1ec00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 29.670010] Rebooting in 86400 seconds..