[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.412077] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.387711] random: sshd: uninitialized urandom read (32 bytes read) [ 21.805647] random: sshd: uninitialized urandom read (32 bytes read) [ 22.523134] random: sshd: uninitialized urandom read (32 bytes read) [ 22.659907] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.202' (ECDSA) to the list of known hosts. [ 28.139216] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 28.223550] WARNING: CPU: 1 PID: 4462 at include/net/sock.h:660 smc_unhash_sk+0x357/0x4b0 [ 28.232152] Kernel panic - not syncing: panic_on_warn set ... [ 28.232152] [ 28.239594] CPU: 1 PID: 4462 Comm: syz-executor879 Not tainted 4.18.0-rc3+ #119 [ 28.247150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.256514] Call Trace: [ 28.259110] dump_stack+0x1c9/0x2b4 [ 28.262726] ? dump_stack_print_info.cold.2+0x52/0x52 [ 28.267904] panic+0x238/0x4e7 [ 28.271086] ? add_taint.cold.5+0x16/0x16 [ 28.275224] ? __warn.cold.8+0x148/0x1ba [ 28.279277] ? __warn.cold.8+0x117/0x1ba [ 28.283338] ? smc_unhash_sk+0x357/0x4b0 [ 28.287386] __warn.cold.8+0x163/0x1ba [ 28.291260] ? smc_unhash_sk+0x357/0x4b0 [ 28.295313] report_bug+0x252/0x2d0 [ 28.298954] do_error_trap+0x1fc/0x4d0 [ 28.302850] ? math_error+0x3e0/0x3e0 [ 28.306645] ? kasan_check_write+0x14/0x20 [ 28.310890] ? do_raw_spin_lock+0xc1/0x200 [ 28.315131] ? lock_acquire+0x1e4/0x540 [ 28.319111] ? smc_unhash_sk+0xd7/0x4b0 [ 28.323081] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.327930] do_invalid_op+0x1b/0x20 [ 28.331632] invalid_op+0x14/0x20 [ 28.335078] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 28.339729] Code: 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 88 00 00 00 48 81 c4 c0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c9 5b 18 fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 a3 34 56 fa [ 28.358882] RSP: 0018:ffff8801ac007480 EFLAGS: 00010293 [ 28.364231] RAX: ffff8801ad9da700 RBX: ffff8801d908f140 RCX: ffffffff8763af46 [ 28.371490] RDX: 0000000000000000 RSI: ffffffff8763b007 RDI: 0000000000000005 [ 28.378749] RBP: ffff8801ac007568 R08: ffff8801ad9da700 R09: ffffed003b211e38 [ 28.386017] R10: ffffed003b211e38 R11: ffff8801d908f1c3 R12: 1ffff10035800e94 [ 28.393544] R13: ffff8801ac007540 R14: ffffffff89938060 R15: ffff8801d908f1c0 [ 28.400927] ? smc_unhash_sk+0x296/0x4b0 [ 28.405014] ? smc_unhash_sk+0x357/0x4b0 [ 28.409088] ? smc_rx_data_available+0x120/0x120 [ 28.413926] ? release_sock+0x1ec/0x2c0 [ 28.417908] ? do_raw_write_trylock+0x1c0/0x1c0 [ 28.422599] ? __release_sock+0x3a0/0x3a0 [ 28.426959] ? smc_release+0x2cb/0x680 [ 28.430896] ? trace_hardirqs_on+0xd/0x10 [ 28.435036] ? __local_bh_enable_ip+0x161/0x230 [ 28.439692] smc_release+0x3d1/0x680 [ 28.443392] __sock_release+0xd7/0x260 [ 28.447275] ? __sock_release+0x260/0x260 [ 28.451428] sock_close+0x19/0x20 [ 28.454880] __fput+0x355/0x8b0 [ 28.458188] ? fput+0x1a0/0x1a0 [ 28.461484] ? kasan_check_write+0x14/0x20 [ 28.465729] ? do_raw_spin_lock+0xc1/0x200 [ 28.470007] ____fput+0x15/0x20 [ 28.473288] task_work_run+0x1ec/0x2a0 [ 28.477763] ? task_work_cancel+0x250/0x250 [ 28.482128] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 28.487662] ? switch_task_namespaces+0xa2/0xd0 [ 28.492327] do_exit+0x1b08/0x2750 [ 28.495875] ? mm_update_next_owner+0x9a0/0x9a0 [ 28.500636] ? trace_hardirqs_on+0x10/0x10 [ 28.504882] ? trace_hardirqs_on+0x10/0x10 [ 28.509205] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 28.513792] ? kasan_check_write+0x14/0x20 [ 28.518204] ? do_raw_spin_lock+0xc1/0x200 [ 28.522434] ? _raw_spin_unlock+0x22/0x30 [ 28.526585] ? tcp_fastopen_reset_cipher+0x2a6/0x570 [ 28.531692] ? tcp_fastopen_ctx_destroy+0x260/0x260 [ 28.536722] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 28.542264] ? _copy_from_user+0xdf/0x150 [ 28.546406] ? do_tcp_setsockopt.isra.41+0x1fe/0x2620 [ 28.551600] ? release_sock+0x1ec/0x2c0 [ 28.555565] ? lock_downgrade+0x8f0/0x8f0 [ 28.559701] ? kasan_check_read+0x11/0x20 [ 28.563836] ? do_raw_spin_unlock+0xa7/0x2f0 [ 28.568238] ? release_sock+0x1ec/0x2c0 [ 28.572207] ? trace_hardirqs_on+0xd/0x10 [ 28.576347] ? __local_bh_enable_ip+0x161/0x230 [ 28.581006] ? _raw_spin_unlock_bh+0x30/0x40 [ 28.585403] ? release_sock+0x1ec/0x2c0 [ 28.589371] ? kasan_check_write+0x14/0x20 [ 28.593648] ? __release_sock+0x3a0/0x3a0 [ 28.597796] ? __local_bh_enable_ip+0x161/0x230 [ 28.602455] ? smc_setsockopt+0x388/0x6e0 [ 28.606605] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 28.612128] ? __sys_setsockopt+0x257/0x3b0 [ 28.616433] do_group_exit+0x177/0x440 [ 28.620317] ? mm_fault_error+0x380/0x380 [ 28.624447] ? __ia32_sys_exit+0x50/0x50 [ 28.628492] __x64_sys_exit_group+0x3e/0x50 [ 28.632801] do_syscall_64+0x1b9/0x820 [ 28.636778] ? syscall_return_slowpath+0x5e0/0x5e0 [ 28.641699] ? syscall_return_slowpath+0x31d/0x5e0 [ 28.646616] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 28.651616] ? prepare_exit_to_usermode+0x291/0x3b0 [ 28.656614] ? perf_trace_sys_enter+0xb10/0xb10 [ 28.661266] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.666096] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.671268] RIP: 0033:0x43ec88 [ 28.674436] Code: Bad RIP value. [ 28.677796] RSP: 002b:00007ffd90eef808 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 28.685487] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 28.692758] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 28.700036] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 28.707300] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 28.714554] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 28.722298] Dumping ftrace buffer: [ 28.725831] (ftrace buffer empty) [ 28.729523] Kernel Offset: disabled [ 28.733137] Rebooting in 86400 seconds..