[ 10.351807] random: sshd: uninitialized urandom read (32 bytes read) [....] 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: [ 26.459446] random: sshd: uninitialized urandom read (32 bytes read) [ 26.751368] audit: type=1400 audit(1568149845.909:6): avc: denied { map } for pid=1773 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 [ 26.796040] random: sshd: uninitialized urandom read (32 bytes read) [ 27.292696] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.161' (ECDSA) to the list of known hosts. [ 32.924355] urandom_read: 1 callbacks suppressed [ 32.924359] random: sshd: uninitialized urandom read (32 bytes read) [ 33.020379] audit: type=1400 audit(1568149852.179:7): avc: denied { map } for pid=1791 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 2019/09/10 21:10:52 parsed 1 programs [ 33.084544] audit: type=1400 audit(1568149852.239:8): avc: denied { map } for pid=1791 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 [ 33.600184] random: cc1: uninitialized urandom read (8 bytes read) 2019/09/10 21:10:53 executed programs: 0 [ 34.473544] audit: type=1400 audit(1568149853.629:9): avc: denied { map } for pid=1791 comm="syz-execprog" path="/root/syzkaller-shm778519116" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 2019/09/10 21:10:58 executed programs: 96 [ 40.403992] ------------[ cut here ]------------ [ 40.408905] WARNING: CPU: 1 PID: 2860 at net/ipv4/tcp_timer.c:429 tcp_retransmit_timer+0x1a66/0x2590 [ 40.418297] Kernel panic - not syncing: panic_on_warn set ... [ 40.418297] [ 40.425654] CPU: 1 PID: 2860 Comm: udevd Not tainted 4.14.143+ #0 [ 40.431875] Call Trace: [ 40.434455] [ 40.436604] dump_stack+0xca/0x134 [ 40.440149] panic+0x1ea/0x3d3 [ 40.443343] ? add_taint.cold+0x16/0x16 [ 40.447320] ? tcp_retransmit_timer+0x1a66/0x2590 [ 40.452163] ? __probe_kernel_read+0x163/0x1c0 [ 40.456740] ? tcp_retransmit_timer+0x1a66/0x2590 [ 40.461690] __warn.cold+0x2f/0x3a [ 40.465246] ? tcp_retransmit_timer+0x1a66/0x2590 [ 40.470079] report_bug+0x20a/0x248 [ 40.473706] do_error_trap+0x1bf/0x2d0 [ 40.477571] ? math_error+0x2d0/0x2d0 [ 40.481785] ? __lock_acquire+0x5d7/0x4320 [ 40.485998] ? __wake_up_common+0x5d0/0x5d0 [ 40.490324] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.496115] invalid_op+0x18/0x40 [ 40.499546] RIP: 0010:tcp_retransmit_timer+0x1a66/0x2590 [ 40.504969] RSP: 0018:ffff8881d7707c78 EFLAGS: 00010206 [ 40.510346] RAX: ffff8881d4d34680 RBX: ffff8881cb0e9d80 RCX: 0000000000000001 [ 40.517598] RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881cff572c8 [ 40.524862] RBP: ffff8881cff56900 R08: ffff88821ffff05c R09: ffff88821ffff048 [ 40.532126] R10: ffff88821ffff057 R11: ffff88821ffff050 R12: ffff8881cff56f9a [ 40.539398] R13: ffff8881cff56930 R14: 0000000000000000 R15: ffff8881cff5710c [ 40.546665] ? tcp_retransmit_timer+0x1a66/0x2590 [ 40.551498] ? sched_clock+0x5/0x10 [ 40.555114] ? sched_clock_cpu+0x31/0x1c0 [ 40.559256] ? tcp_write_timer_handler+0x780/0x780 [ 40.564168] tcp_write_timer_handler+0x43d/0x780 [ 40.568912] tcp_write_timer+0xc9/0x170 [ 40.572867] call_timer_fn+0x15b/0x6a0 [ 40.576748] ? collect_expired_timers+0x280/0x280 [ 40.581613] ? check_preemption_disabled+0x35/0x1f0 [ 40.586655] ? _raw_spin_unlock_irq+0x24/0x50 [ 40.591133] ? tcp_write_timer_handler+0x780/0x780 [ 40.596039] expire_timers+0x227/0x4c0 [ 40.599932] run_timer_softirq+0x1eb/0x5d0 [ 40.604158] ? expire_timers+0x4c0/0x4c0 [ 40.608295] ? check_preemption_disabled+0x35/0x1f0 [ 40.613319] ? check_preemption_disabled+0x35/0x1f0 [ 40.618331] __do_softirq+0x234/0x9ec [ 40.622129] ? check_preemption_disabled+0x35/0x1f0 [ 40.627158] irq_exit+0x114/0x150 [ 40.630592] smp_apic_timer_interrupt+0x1a7/0x650 [ 40.635424] ? rcu_dynticks_curr_cpu_in_eqs+0x4c/0xa0 [ 40.640775] apic_timer_interrupt+0x8c/0xa0 [ 40.640785] [ 40.640796] RIP: 0010:__sanitizer_cov_trace_pc+0x23/0x60 [ 40.652766] RSP: 0018:ffff8881c7a07838 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 [ 40.660481] RAX: ffff8881d4d34680 RBX: dffffc0000000000 RCX: ffffffffb4a51a0c [ 40.660486] RDX: 0000000000000000 RSI: 000000000000003d RDI: ffff8881d24eed90 [ 40.660490] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffed103aee44fa [ 40.660494] R10: ffffed103aee44f9 R11: ffff8881d77227cf R12: ffff8881d66f5c58 [ 40.660498] R13: 000000000000003d R14: 0000000000000008 R15: 000000000000003d [ 40.660518] ? rcu_dynticks_curr_cpu_in_eqs+0x4c/0xa0 [ 40.702101] avc_lookup+0xb7/0x190 [ 40.702113] avc_has_perm_noaudit+0xdf/0x2d0 [ 40.710028] ? avc_has_extended_perms+0xc20/0xc20 [ 40.714882] ? lookup_fast+0x453/0xea0 [ 40.718784] selinux_inode_permission+0x2a6/0x4b0 [ 40.723666] ? selinux_inode_link+0x20/0x20 [ 40.727977] ? walk_component+0x407/0xbf0 [ 40.732118] security_inode_permission+0xb4/0xf0 [ 40.736880] __inode_permission2+0x8c/0x2c0 [ 40.741191] inode_permission2+0x2d/0x100 [ 40.745333] link_path_walk+0x19b/0x1110 [ 40.749385] ? walk_component+0xbf0/0xbf0 [ 40.753522] path_parentat.isra.0+0x41/0x150 [ 40.757912] filename_parentat.isra.0+0x18d/0x3e0 [ 40.762738] ? getname+0x20/0x20 [ 40.766091] ? check_stack_object+0x86/0xa0 [ 40.770402] ? __check_object_size+0x233/0x35c [ 40.774987] ? strncpy_from_user+0x18e/0x230 [ 40.779380] ? getname_flags+0x22e/0x550 [ 40.783440] SyS_renameat2+0x1b9/0xa00 [ 40.787313] ? task_work_run+0xfe/0x1a0 [ 40.791264] ? SyS_link+0x30/0x30 [ 40.794699] ? lock_downgrade+0x5d0/0x5d0 [ 40.798847] ? task_work_run+0x6d/0x1a0 [ 40.802811] ? _raw_spin_unlock_irq+0x24/0x50 [ 40.807287] ? trace_hardirqs_on_caller+0x37b/0x540 [ 40.812284] ? _raw_spin_unlock_irq+0x35/0x50 [ 40.816868] ? do_syscall_64+0x43/0x520 [ 40.820834] ? SyS_renameat+0x30/0x30 [ 40.824627] do_syscall_64+0x19b/0x520 [ 40.828503] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 40.833705] RIP: 0033:0x7ff31e609527 [ 40.837405] RSP: 002b:00007ffcb9e02f78 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 [ 40.845149] RAX: ffffffffffffffda RBX: 00000000015eb470 RCX: 00007ff31e609527 [ 40.852401] RDX: 00007ff31e93ae98 RSI: 00007ffcb9e02fb0 RDI: 00007ffcb9e033b0 [ 40.859651] RBP: 000000000161dc70 R08: 00007ff31ef7c7a0 R09: 0000000000000001 [ 40.866939] R10: 0000000000000001 R11: 0000000000000246 R12: 00000000015d8c70 [ 40.874189] R13: 00000000015ce030 R14: 00007ffcb9e02fb0 R15: 0000000000000000 [ 40.881944] Kernel Offset: 0x33800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 40.892880] Rebooting in 86400 seconds..